From aca38f5c96709f56db75a476051eb644de644d3d Mon Sep 17 00:00:00 2001 From: Nathan Reiner Date: Thu, 30 Jul 2026 09:36:34 +0200 Subject: restructure project --- src/z/js/parser/ast.zig | 3334 ----------------------------------------------- 1 file changed, 3334 deletions(-) delete mode 100644 src/z/js/parser/ast.zig (limited to 'src/z/js/parser/ast.zig') diff --git a/src/z/js/parser/ast.zig b/src/z/js/parser/ast.zig deleted file mode 100644 index 3dc29a3..0000000 --- a/src/z/js/parser/ast.zig +++ /dev/null @@ -1,3334 +0,0 @@ -const std = @import("std"); - -pub const Loc = struct { - start: usize, - end: usize, -}; - -const lex = @import("lexical_grammar.zig"); -const Token = lex.Token; -const TokenType = lex.TokenType; - -pub const FormatOptions = struct { - indent_size: usize = 4, -}; - -pub const Formatter = struct { - buf: []u8, - pos: usize, - indent_level: usize, - options: FormatOptions, - - pub fn write(self: *@This(), s: []const u8) void { - @memcpy(self.buf[self.pos..][0..s.len], s); - self.pos += s.len; - } - - pub fn writeChar(self: *@This(), c: u8) void { - self.buf[self.pos] = c; - self.pos += 1; - } - - pub fn writeIndent(self: *@This()) void { - const spaces = self.indent_level * self.options.indent_size; - var i: usize = 0; - while (i < spaces) : (i += 1) { - self.writeChar(' '); - } - } - - pub fn newline(self: *@This()) void { - self.writeChar('\n'); - } -}; - -pub const ParseError = error{ - UnexpectedToken, - ExpectedToken, - ExpectedExpression, - ExpectedStatement, - ExpectedIdentifier, - UnclosedString, - InvalidNumber, - InvalidEscape, - UnterminatedComment, - ExpectedParameterName, - ExpectedPropertyName, - UnterminatedTemplate, - InvalidAssignmentTarget, - TooManyTokens, -}; - -const BP = struct { - const comma = 1; - const assign = 2; - const yield = 3; - const conditional = 4; - const coalesce = 5; - const log_or = 6; - const log_and = 7; - const bit_or = 8; - const bit_xor = 9; - const bit_and = 10; - const equality = 11; - const relational = 12; - const shift = 13; - const additive = 14; - const multiplicative = 15; - const exponentiation = 16; - const unary = 17; - const update = 18; - const call = 19; - const member = 20; -}; - -pub const NodeArena = struct { - exprs: [8192]Expr = undefined, - expr_count: usize = 0, - stmts: [8192]Stmt = undefined, - stmt_count: usize = 0, - decls: [1024]Decl = undefined, - decl_count: usize = 0, - pats: [1024]Pat = undefined, - pat_count: usize = 0, - lits: [1024]Lit = undefined, - lit_count: usize = 0, - string_buf: [65536]u8 = undefined, - string_pos: usize = 0, - - fn exprPtr(self: *NodeArena, data: ExprType, loc: Loc) *const Expr { - const idx = self.expr_count; - self.exprs[idx] = .{ .loc = loc, .data = data }; - self.expr_count += 1; - return &self.exprs[idx]; - } - - fn stmtPtr(self: *NodeArena, data: StmtType, loc: Loc) *const Stmt { - const idx = self.stmt_count; - self.stmts[idx] = .{ .loc = loc, .data = data }; - self.stmt_count += 1; - return &self.stmts[idx]; - } - - fn declPtr(self: *NodeArena, data: DeclType, loc: Loc) *const Decl { - const idx = self.decl_count; - self.decls[idx] = .{ .loc = loc, .data = data }; - self.decl_count += 1; - return &self.decls[idx]; - } - - fn patPtr(self: *NodeArena, data: PatType, loc: Loc) *const Pat { - const idx = self.pat_count; - self.pats[idx] = .{ .loc = loc, .data = data }; - self.pat_count += 1; - return &self.pats[idx]; - } - - fn litPtr(self: *NodeArena, data: LitType, loc: Loc) *const Lit { - const idx = self.lit_count; - self.lits[idx] = .{ .loc = loc, .data = data }; - self.lit_count += 1; - return &self.lits[idx]; - } -}; - -pub const Parser = struct { - tokens: []const Token, - pos: usize, - source: []const u8, - arena: *NodeArena, - - pub fn init(tokens: []const Token, source: []const u8, arena: *NodeArena) @This() { - return .{ .tokens = tokens, .pos = 0, .source = source, .arena = arena }; - } - - fn tok(self: *@This()) Token { - return self.tokens[self.pos]; - } - - fn peek(self: *@This()) TokenType { - return self.tokens[self.pos].kind; - } - - fn peekAt(self: *@This(), offset: usize) TokenType { - const idx = self.pos + offset; - if (idx >= self.tokens.len) return .eof; - return self.tokens[idx].kind; - } - - fn advance(self: *@This()) void { - self.pos += 1; - } - - fn advanceTok(self: *@This()) Token { - const t = self.tokens[self.pos]; - self.pos += 1; - return t; - } - - fn expect(self: *@This(), kind: TokenType) ParseError!void { - if (self.peek() != kind) return ParseError.ExpectedToken; - self.advance(); - } - - fn expectTok(self: *@This(), kind: TokenType) ParseError!Token { - if (self.peek() != kind) return ParseError.ExpectedToken; - return self.advanceTok(); - } - - fn match(self: *@This(), kind: TokenType) bool { - if (self.peek() == kind) { - _ = self.advanceTok(); - return true; - } - return false; - } - - fn matchKeyword(self: *@This(), kw: TokenType) bool { - if (self.peek() == kw) { - _ = self.advanceTok(); - return true; - } - return false; - } - - fn isLineTerminatorBeforeNext(self: *@This()) bool { - if (self.pos == 0) return false; - const prev_token = self.tokens[self.pos - 1]; - const next_token = self.tokens[self.pos]; - var i = prev_token.loc.end; - while (i < next_token.loc.start) : (i += 1) { - if (i >= self.source.len) break; - const c = self.source[i]; - switch (c) { - '\n', '\r' => return true, - else => {}, - } - } - return false; - } - - fn as_identifier(self: *@This(), t: Token) []const u8 { - return self.source[t.loc.start..t.loc.end]; - } - - fn tokenSlice(self: *@This(), t: Token) []const u8 { - return self.source[t.loc.start..t.loc.end]; - } - - pub fn parseProgram(self: *@This()) ParseError!Program { - var stmts: [2048]Stmt = undefined; - var count: usize = 0; - - while (self.peek() != .eof) { - const item = try self.parseStatementListItem(); - stmts[count] = item; - count += 1; - if (count >= stmts.len) return ParseError.TooManyTokens; - } - - const body = stmts[0..count]; - const loc: Loc = if (body.len > 0) .{ .start = body[0].loc.start, .end = body[body.len - 1].loc.end } else .{ .start = 0, .end = 0 }; - - return .{ .body = body, .loc = loc }; - } - - fn parseStatementListItem(self: *@This()) ParseError!Stmt { - switch (self.peek()) { - .function => return (try self.parseFunctionDecl(.normal, .stmt)).?, - .async => { - if (self.peekAt(1) == .function) { - return (try self.parseFunctionDecl(.async, .stmt)).?; - } - if (self.peekAt(1) == .@"*" and self.peekAt(2) == .function) { - return (try self.parseFunctionDecl(.async_generator, .stmt)).?; - } - return self.parseStatement(); - }, - .class => return (try self.parseClassDecl(.stmt)).?, - .@"const", .let => return self.parseLexicalDecl(), - .@"var" => return self.parseVarStmt(), - .using => return self.parseUsingStmt(), - .import => return try self.parseImport(), - .@"export" => return try self.parseExport(), - else => return self.parseStatement(), - } - } - - fn parseStatement(self: *@This()) ParseError!Stmt { - switch (self.peek()) { - .lbrace => return self.parseBlock(), - .semicolon => { - const t = self.advanceTok(); - return Stmt{ .loc = .{ .start = t.loc.start, .end = t.loc.end }, .data = .{ .empty = {} } }; - }, - .@"if" => return self.parseIf(), - .@"while" => return self.parseWhile(), - .do => return self.parseDoWhile(), - .@"for" => return self.parseFor(), - .@"continue" => return self.parseContinue(), - .@"break" => return self.parseBreak(), - .@"return" => return self.parseReturn(), - .@"switch" => return self.parseSwitch(), - .throw => return self.parseThrow(), - .@"try" => return self.parseTry(), - .debugger => { - const t = self.advanceTok(); - self.semicolon(); - return Stmt{ .loc = .{ .start = t.loc.start, .end = t.loc.end }, .data = .{ .debugger = {} } }; - }, - .with => return self.parseWith(), - .function => return (try self.parseFunctionDecl(.normal, .stmt)).?, - .async => { - if (self.peekAt(1) == .function) { - return (try self.parseFunctionDecl(.async, .stmt)).?; - } - if (self.peekAt(1) == .@"*") return self.parseExpressionStatement(); - if (self.peekAt(1).isIdentifier()) { - return self.parseExpressionStatement(); - } - return self.parseExpressionStatement(); - }, - .class => return (try self.parseClassDecl(.stmt)).?, - .@"const", .let => return self.parseLexicalDecl(), - .@"var" => return self.parseVarStmt(), - .import => return try self.parseImport(), - .@"export" => return try self.parseExport(), - else => return self.parseExpressionStatement(), - } - } - - fn parseBlock(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - var stmts: [1024]Stmt = undefined; - var count: usize = 0; - - while (self.peek() != .rbrace and self.peek() != .eof) { - const s = try self.parseStatementListItem(); - stmts[count] = s; - count += 1; - if (count >= stmts.len) return ParseError.TooManyTokens; - } - - const end_tok = try self.expectTok(.rbrace); - const end = end_tok.loc.end; - - const block = Stmt{ - .loc = .{ .start = start, .end = end }, - .data = .{ .block = .{ .loc = .{ .start = start, .end = end }, .body = stmts[0..count] } }, - }; - return block; - } - - fn parseIf(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - try self.expect(.lparen); - const condition = try self.parseExpr(0); - try self.expect(.rparen); - const consequent = try self.statementPointer(); - var alternate: ?*const Stmt = null; - if (self.matchKeyword(.@"else")) { - alternate = try self.statementPointer(); - } - const end = if (alternate) |a| a.loc.end else consequent.loc.end; - return Stmt{ - .loc = .{ .start = start, .end = end }, - .data = .{ .@"if" = .{ .loc = .{ .start = start, .end = end }, .condition = condition, .consequent = consequent, .alternate = alternate } }, - }; - } - - fn parseWhile(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - try self.expect(.lparen); - const condition = try self.parseExpr(0); - try self.expect(.rparen); - const body = try self.statementPointer(); - return Stmt{ - .loc = .{ .start = start, .end = body.loc.end }, - .data = .{ .@"while" = .{ .loc = .{ .start = start, .end = body.loc.end }, .condition = condition, .body = body } }, - }; - } - - fn parseDoWhile(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - const body = try self.statementPointer(); - try self.expect(.@"while"); - try self.expect(.lparen); - const condition = try self.parseExpr(0); - try self.expect(.rparen); - self.semicolon(); - return Stmt{ - .loc = .{ .start = start, .end = condition.loc.end }, - .data = .{ .do_while = .{ .loc = .{ .start = start, .end = condition.loc.end }, .body = body, .condition = condition } }, - }; - } - - fn parseFor(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - try self.expect(.lparen); - - var for_init: ?ForInit = null; - var condition: ?*const Expr = null; - var update: ?*const Expr = null; - - if (self.peek() != .semicolon) { - if (self.peek() == .@"var" or self.peek() == .let or self.peek() == .@"const") { - const decl = try self.parseForDeclaration(); - for_init = .{ .decl = decl }; - } else { - const expr = try self.parseExpr(0); - for_init = .{ .expr = expr }; - } - } - - if (self.matchKeyword(.in)) { - const right = try self.parseExpr(0); - try self.expect(.rparen); - const body = try self.statementPointer(); - return Stmt{ - .loc = .{ .start = start, .end = body.loc.end }, - .data = .{ .for_in = .{ .loc = .{ .start = start, .end = body.loc.end }, .left = for_init.?, .right = right, .body = body } }, - }; - } - - if (self.matchKeyword(.of)) { - const right = try self.parseExpr(0); - try self.expect(.rparen); - const body = try self.statementPointer(); - return Stmt{ - .loc = .{ .start = start, .end = body.loc.end }, - .data = .{ .for_of = .{ .loc = .{ .start = start, .end = body.loc.end }, .await_token = false, .left = for_init.?, .right = right, .body = body } }, - }; - } - - try self.expect(.semicolon); - if (self.peek() != .semicolon and self.peek() != .rparen) { - condition = try self.parseExpr(0); - } - try self.expect(.semicolon); - if (self.peek() != .rparen) { - update = try self.parseExpr(0); - } - try self.expect(.rparen); - const body = try self.statementPointer(); - return Stmt{ - .loc = .{ .start = start, .end = body.loc.end }, - .data = .{ .@"for" = .{ .loc = .{ .start = start, .end = body.loc.end }, .init = for_init, .condition = condition, .update = update, .body = body } }, - }; - } - - fn parseForDeclaration(self: *@This()) ParseError!*const Decl { - const kind_tok = self.advanceTok(); - var decls: [128]VarDeclarator = undefined; - var count: usize = 0; - - while (true) { - const pat = try self.parseBindingPattern(); - var decl_init: ?*const Expr = null; - if (self.match(.@"=")) { - decl_init = try self.parseExpr(0); - } - decls[count] = .{ .loc = pat.loc, .id = pat, .init = decl_init }; - count += 1; - if (!self.match(.comma)) break; - } - - const kind: VarKind = switch (kind_tok.kind) { - .@"var" => .@"var", - .let => .let, - .@"const" => .@"const", - else => return ParseError.UnexpectedToken, - }; - - return self.arena.declPtr(.{ .@"var" = .{ .loc = .{ .start = kind_tok.loc.start, .end = decls[count - 1].loc.end }, .kind = kind, .decls = decls[0..count] } }, .{ .start = kind_tok.loc.start, .end = decls[count - 1].loc.end }); - } - - fn parseContinue(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - var label: ?[]const u8 = null; - if (self.peek() == .identifier and !self.isLineTerminatorBeforeNext()) { - const t = self.advanceTok(); - label = self.tokenSlice(t); - } - self.semicolon(); - return Stmt{ .loc = .{ .start = start, .end = start + 8 }, .data = .{ .@"continue" = .{ .loc = .{ .start = start, .end = start + 8 }, .label = label } } }; - } - - fn parseBreak(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - var label: ?[]const u8 = null; - if (self.peek() == .identifier and !self.isLineTerminatorBeforeNext()) { - const t = self.advanceTok(); - label = self.tokenSlice(t); - } - self.semicolon(); - return Stmt{ .loc = .{ .start = start, .end = start + 5 }, .data = .{ .@"break" = .{ .loc = .{ .start = start, .end = start + 5 }, .label = label } } }; - } - - fn parseReturn(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - var arg: ?*const Expr = null; - if (self.peek() != .semicolon and self.peek() != .rbrace and self.peek() != .eof and !self.isLineTerminatorBeforeNext()) { - arg = try self.parseExpr(0); - } - self.semicolon(); - return Stmt{ .loc = .{ .start = start, .end = arg.?.loc.end }, .data = .{ .@"return" = .{ .loc = .{ .start = start, .end = if (arg) |a| a.loc.end else start + 6 }, .arg = arg } } }; - } - - fn parseSwitch(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - try self.expect(.lparen); - const discriminant = try self.parseExpr(0); - try self.expect(.rparen); - try self.expect(.lbrace); - - var cases: [256]SwitchCase = undefined; - var case_count: usize = 0; - - while (self.peek() == .case or self.peek() == .default) { - const case_start = self.tok().loc.start; - if (self.matchKeyword(.case)) { - const case_test = try self.parseExpr(0); - try self.expect(.@":"); - var consequent: [128]Stmt = undefined; - var cons_count: usize = 0; - while (self.peek() != .case and self.peek() != .default and self.peek() != .rbrace and self.peek() != .eof) { - const s = try self.parseStatementListItem(); - consequent[cons_count] = s; - cons_count += 1; - } - cases[case_count] = .{ .loc = .{ .start = case_start, .end = self.tok().loc.start }, .condition = case_test, .consequent = consequent[0..cons_count] }; - case_count += 1; - } else if (self.matchKeyword(.default)) { - try self.expect(.@":"); - var consequent: [128]Stmt = undefined; - var cons_count: usize = 0; - while (self.peek() != .case and self.peek() != .default and self.peek() != .rbrace and self.peek() != .eof) { - const s = try self.parseStatementListItem(); - consequent[cons_count] = s; - cons_count += 1; - } - cases[case_count] = .{ .loc = .{ .start = case_start, .end = self.tok().loc.start }, .condition = null, .consequent = consequent[0..cons_count] }; - case_count += 1; - } - } - - const end_tok = try self.expectTok(.rbrace); - return Stmt{ - .loc = .{ .start = start, .end = end_tok.loc.end }, - .data = .{ .@"switch" = .{ .loc = .{ .start = start, .end = end_tok.loc.end }, .discriminant = discriminant, .cases = cases[0..case_count] } }, - }; - } - - fn parseThrow(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - if (self.isLineTerminatorBeforeNext()) return ParseError.ExpectedExpression; - const arg = try self.parseExpr(0); - self.semicolon(); - return Stmt{ .loc = .{ .start = start, .end = arg.loc.end }, .data = .{ .throw = .{ .loc = .{ .start = start, .end = arg.loc.end }, .arg = arg } } }; - } - - fn parseTry(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - const block = try self.parseBlockStmt(); - var handler: ?CatchClause = null; - var finalizer: ?BlockStmt = null; - - if (self.matchKeyword(.@"catch")) { - var param: ?Pat = null; - if (self.match(.lparen)) { - const pat = try self.parseBindingPattern(); - param = pat; - try self.expect(.rparen); - } - const catch_body = try self.parseBlockStmt(); - handler = .{ .loc = .{ .start = block.loc.start, .end = catch_body.loc.end }, .param = param, .body = catch_body }; - } - - if (self.matchKeyword(.finally)) { - const finally_body = try self.parseBlockStmt(); - finalizer = finally_body; - } - - const end = if (finalizer) |f| f.loc.end else if (handler) |h| h.loc.end else block.loc.end; - return Stmt{ - .loc = .{ .start = start, .end = end }, - .data = .{ .@"try" = .{ .loc = .{ .start = start, .end = end }, .block = block, .handler = handler, .finalizer = finalizer } }, - }; - } - - fn parseWith(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - try self.expect(.lparen); - const obj = try self.parseExpr(0); - try self.expect(.rparen); - const body = try self.statementPointer(); - return Stmt{ - .loc = .{ .start = start, .end = body.loc.end }, - .data = .{ .with = .{ .loc = .{ .start = start, .end = body.loc.end }, .obj = obj, .body = body } }, - }; - } - - fn parseBlockStmt(self: *@This()) ParseError!BlockStmt { - const start = try self.expectTok(.lbrace); - var stmts: [1024]Stmt = undefined; - var count: usize = 0; - - while (self.peek() != .rbrace and self.peek() != .eof) { - const s = try self.parseStatementListItem(); - stmts[count] = s; - count += 1; - if (count >= stmts.len) return ParseError.TooManyTokens; - } - - const end = try self.expectTok(.rbrace); - return .{ .loc = .{ .start = start.loc.start, .end = end.loc.end }, .body = stmts[0..count] }; - } - - fn parseVarStmt(self: *@This()) ParseError!Stmt { - const kind_tok = self.advanceTok(); - var decls: [128]VarDeclarator = undefined; - var count: usize = 0; - - while (true) { - const pat = try self.parseBindingPattern(); - var decl_init: ?*const Expr = null; - if (self.match(.@"=")) { - decl_init = try self.parseExpr(0); - } - decls[count] = .{ .loc = pat.loc, .id = pat, .init = decl_init }; - count += 1; - if (!self.match(.comma)) break; - } - - self.semicolon(); - const kind: VarKind = .@"var"; - return Stmt{ - .loc = .{ .start = kind_tok.loc.start, .end = decls[count - 1].loc.end }, - .data = .{ .variable = .{ .loc = .{ .start = kind_tok.loc.start, .end = decls[count - 1].loc.end }, .kind = kind, .decls = decls[0..count] } }, - }; - } - - fn parseLexicalDecl(self: *@This()) ParseError!Stmt { - const kind_tok = self.advanceTok(); - var decls: [128]VarDeclarator = undefined; - var count: usize = 0; - - while (true) { - const pat = try self.parseBindingPattern(); - var decl_init: ?*const Expr = null; - if (kind_tok.kind == .@"const") { - if (!self.match(.@"=")) return ParseError.ExpectedToken; - decl_init = try self.parseExpr(0); - } else if (self.match(.@"=")) { - decl_init = try self.parseExpr(0); - } - decls[count] = .{ .loc = pat.loc, .id = pat, .init = decl_init }; - count += 1; - if (!self.match(.comma)) break; - } - - self.semicolon(); - const kind: VarKind = switch (kind_tok.kind) { - .let => .let, - .@"const" => .@"const", - else => return ParseError.UnexpectedToken, - }; - return Stmt{ - .loc = .{ .start = kind_tok.loc.start, .end = decls[count - 1].loc.end }, - .data = .{ .lexical = .{ .loc = .{ .start = kind_tok.loc.start, .end = decls[count - 1].loc.end }, .kind = kind, .decls = decls[0..count] } }, - }; - } - - fn parseUsingStmt(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - var decls: [128]VarDeclarator = undefined; - var count: usize = 0; - - while (true) { - const id_tok = try self.expectTok(.identifier); - const id = self.tokenSlice(id_tok); - var decl_init: ?*const Expr = null; - if (self.match(.@"=")) { - decl_init = try self.parseExpr(0); - } - decls[count] = .{ .loc = .{ .start = id_tok.loc.start, .end = if (decl_init) |e| e.loc.end else id_tok.loc.end }, .id = Pat{ .loc = .{ .start = id_tok.loc.start, .end = id_tok.loc.end }, .data = .{ .ident = id } }, .init = decl_init }; - count += 1; - if (!self.match(.comma)) break; - } - - self.semicolon(); - return Stmt{ - .loc = .{ .start = start, .end = decls[count - 1].loc.end }, - .data = .{ .using = .{ .loc = .{ .start = start, .end = decls[count - 1].loc.end }, .decls = decls[0..count] } }, - }; - } - - fn parseExpressionStatement(self: *@This()) ParseError!Stmt { - const expr = try self.parseExpr(0); - self.semicolon(); - return Stmt{ .loc = expr.loc, .data = .{ .expr = .{ .loc = expr.loc, .expr = expr } } }; - } - - fn parseFunctionDecl(self: *@This(), fn_type_arg: FnType, mode: enum { stmt, expr }) ParseError!?Stmt { - const start = self.tok().loc.start; - var fn_type = fn_type_arg; - - if (fn_type == .async) { - _ = self.advanceTok(); // async - } else if (fn_type == .async_generator) { - _ = self.advanceTok(); // async - _ = self.advanceTok(); // * - } - - _ = self.advanceTok(); // function - - if (fn_type == .normal and self.peek() == .@"*") { - self.advance(); - fn_type = .generator; - } - - var id: ?[]const u8 = null; - if (self.peek().isIdentifier()) { - const id_tok = self.advanceTok(); - id = self.tokenSlice(id_tok); - } - - const params = try self.parseParams(); - const body = try self.parseFunctionBody(); - - const end = body.loc.end; - - if (mode == .stmt) { - return Stmt{ - .loc = .{ .start = start, .end = end }, - .data = .{ .function = .{ .loc = .{ .start = start, .end = end }, .fn_type = fn_type, .id = id, .params = params, .body = body } }, - }; - } - return null; - } - - fn parseFnExpr(self: *@This()) ParseError!*const Expr { - const start = self.advanceTok().loc.start; - - var fn_type: FnType = .normal; - if (self.peek() == .@"*") { - fn_type = .generator; - self.advance(); - } - - var id: ?[]const u8 = null; - if (self.peek() == .identifier or self.peek().isKeywordButNotLet()) { - const id_tok = self.advanceTok(); - id = self.tokenSlice(id_tok); - } - - const params = try self.parseParams(); - const body = try self.parseFunctionBody(); - - return self.arena.exprPtr( - .{ .func = .{ .loc = .{ .start = start, .end = body.loc.end }, .fn_type = fn_type, .id = id, .params = params, .body = body } }, - .{ .start = start, .end = body.loc.end }, - ); - } - - fn parseParams(self: *@This()) ParseError![]const Pat { - try self.expect(.lparen); - var params: [128]Pat = undefined; - var count: usize = 0; - - if (self.peek() != .rparen) { - while (true) { - if (self.peek() == .@"...") { - self.advance(); - const pat = try self.parseBindingPattern(); - params[count] = Pat{ .loc = pat.loc, .data = .{ .rest = .{ .loc = pat.loc, .arg = self.arena.patPtr(pat.data, pat.loc) } } }; - count += 1; - break; - } - const pat = try self.parseBindingPattern(); - if (self.match(.@"=")) { - const expr = try self.parseExpr(0); - params[count] = Pat{ .loc = .{ .start = pat.loc.start, .end = expr.loc.end }, .data = .{ .assign = .{ .loc = .{ .start = pat.loc.start, .end = expr.loc.end }, .left = self.arena.patPtr(pat.data, pat.loc), .right = expr } } }; - } else { - params[count] = pat; - } - count += 1; - if (!self.match(.comma)) break; - if (self.peek() == .@"...") { - self.advance(); - const rest_pat = try self.parseBindingPattern(); - params[count] = Pat{ .loc = rest_pat.loc, .data = .{ .rest = .{ .loc = rest_pat.loc, .arg = self.arena.patPtr(rest_pat.data, rest_pat.loc) } } }; - count += 1; - break; - } - } - } - - try self.expect(.rparen); - return params[0..count]; - } - - fn parseFunctionBody(self: *@This()) ParseError!BlockStmt { - return self.parseBlockStmt(); - } - - fn parseClassDecl(self: *@This(), mode: enum { stmt, expr }) ParseError!?Stmt { - const start = self.advanceTok().loc.start; - - var id: ?[]const u8 = null; - if (self.peek() == .identifier) { - const id_tok = self.advanceTok(); - id = self.tokenSlice(id_tok); - } - - var super_class: ?*const Expr = null; - if (self.matchKeyword(.extends)) { - super_class = try self.parseExpr(0); - } - - try self.expect(.lbrace); - var elems: [128]ClassElem = undefined; - var elem_count: usize = 0; - - while (self.peek() != .rbrace and self.peek() != .eof) { - const elem = try self.parseClassElement(); - elems[elem_count] = elem; - elem_count += 1; - if (elem_count >= elems.len) return ParseError.TooManyTokens; - } - - const end_tok = try self.expectTok(.rbrace); - - if (mode == .stmt) { - return Stmt{ - .loc = .{ .start = start, .end = end_tok.loc.end }, - .data = .{ .class = .{ .loc = .{ .start = start, .end = end_tok.loc.end }, .id = id, .super_class = super_class, .body = elems[0..elem_count] } }, - }; - } - return null; - } - - fn parseClassExpr(self: *@This()) ParseError!*const Expr { - const start = self.advanceTok().loc.start; - - var id: ?[]const u8 = null; - if (self.peek() == .identifier) { - const id_tok = self.advanceTok(); - id = self.tokenSlice(id_tok); - } - - var super_class: ?*const Expr = null; - if (self.matchKeyword(.extends)) { - super_class = try self.parseExpr(0); - } - - try self.expect(.lbrace); - var elems: [128]ClassElem = undefined; - var elem_count: usize = 0; - - while (self.peek() != .rbrace and self.peek() != .eof) { - const elem = try self.parseClassElement(); - elems[elem_count] = elem; - elem_count += 1; - } - - const end_tok = try self.expectTok(.rbrace); - return self.arena.exprPtr( - .{ .class = .{ .loc = .{ .start = start, .end = end_tok.loc.end }, .id = id, .super_class = super_class, .body = elems[0..elem_count] } }, - .{ .start = start, .end = end_tok.loc.end }, - ); - } - - fn parseClassElement(self: *@This()) ParseError!ClassElem { - const start = self.tok().loc.start; - const is_static = self.matchKeyword(.static); - - if (is_static and self.peek() == .lbrace) { - const body = try self.parseBlockStmt(); - return ClassElem{ .static_block = body }; - } - - if (self.matchKeyword(.get)) { - const key = try self.parsePropKey(); - try self.expect(.lparen); - try self.expect(.rparen); - const body = try self.parseFunctionBody(); - if (is_static) return ClassElem{ .static_get = .{ .key = key, .body = body } }; - return ClassElem{ .get = .{ .key = key, .body = body } }; - } - - if (self.matchKeyword(.set)) { - const key = try self.parsePropKey(); - try self.expect(.lparen); - const param = try self.parseBindingPattern(); - try self.expect(.rparen); - const body = try self.parseFunctionBody(); - if (is_static) return ClassElem{ .static_set = .{ .key = key, .param = param, .body = body } }; - return ClassElem{ .set = .{ .key = key, .param = param, .body = body } }; - } - - if (self.match(.@"*")) { - _ = try self.parsePropKey(); - try self.expect(.lparen); - const params = try self.parseParams(); - const body = try self.parseFunctionBody(); - const fn_expr = FnExpr{ .loc = .{ .start = start, .end = body.loc.end }, .fn_type = .generator, .id = null, .params = params, .body = body }; - if (is_static) return ClassElem{ .static_method = fn_expr }; - return ClassElem{ .method = fn_expr }; - } - - const key = try self.parsePropKey(); - - if (self.peek() == .lparen) { - const params = try self.parseParams(); - const body = try self.parseFunctionBody(); - const fn_expr = FnExpr{ .loc = .{ .start = start, .end = body.loc.end }, .fn_type = .normal, .id = null, .params = params, .body = body }; - if (is_static) return ClassElem{ .static_method = fn_expr }; - return ClassElem{ .method = fn_expr }; - } - - var value: ?*const Expr = null; - if (self.match(.@"=")) { - value = try self.parseExpr(0); - } - if (self.peek() == .semicolon) self.advance(); - - const field = FieldDef{ .loc = .{ .start = start, .end = if (value) |v| v.loc.end else self.tok().loc.start }, .key = key, .value = value }; - if (is_static) return ClassElem{ .static_field = field }; - return ClassElem{ .field = field }; - } - - fn parseImport(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - var specifiers: [32]ImportSpecifier = undefined; - var spec_count: usize = 0; - - if (self.peek() != .string and self.peek() != .lparen) { - if (self.peek() == .identifier or self.peek().isKeyword()) { - const local_tok = self.advanceTok(); - const local = self.tokenSlice(local_tok); - specifiers[spec_count] = .{ .default = local }; - spec_count += 1; - if (self.match(.comma)) {} - } - - if (self.match(.@"*")) { - try self.expect(.identifier); // as - const ns_tok = try self.expectTok(.identifier); - const ns = self.tokenSlice(ns_tok); - specifiers[spec_count] = .{ .namespace = ns }; - spec_count += 1; - } else if (self.peek() == .lbrace) { - self.advance(); - if (self.peek() != .rbrace) { - while (true) { - const imported_tok = try self.expectTok(.identifier); - const imported = self.tokenSlice(imported_tok); - var local = imported; - if (self.match(.identifier)) { - local = self.tokenSlice(self.tokens[self.pos - 1]); - } - specifiers[spec_count] = .{ .named = .{ .imported = imported, .local = local } }; - spec_count += 1; - if (!self.match(.comma)) break; - } - } - try self.expect(.rbrace); - } - } - - var source: []const u8 = ""; - var attrs: [8]ImportAttribute = undefined; - var attr_count: usize = 0; - - if (self.matchKeyword(.from)) { - const str_tok = try self.expectTok(.string); - source = self.tokenSlice(str_tok); - } else if (self.peek() == .string) { - const str_tok = self.advanceTok(); - source = self.tokenSlice(str_tok); - } - - if (self.matchKeyword(.with)) { - try self.expect(.lbrace); - while (self.peek() != .rbrace and self.peek() != .eof) { - const key_tok = self.advanceTok(); - const key = self.tokenSlice(key_tok); - try self.expect(.@":"); - const val_tok = try self.expectTok(.string); - const val = self.tokenSlice(val_tok); - attrs[attr_count] = .{ .key = key, .value = val }; - attr_count += 1; - _ = self.match(.comma); - } - try self.expect(.rbrace); - } - - try self.expect(.semicolon); - return Stmt{ - .loc = .{ .start = start, .end = self.tok().loc.start }, - .data = .{ .import = .{ .loc = .{ .start = start, .end = self.tok().loc.start }, .specifiers = specifiers[0..spec_count], .source = source, .attributes = attrs[0..attr_count] } }, - }; - } - - fn parseExport(self: *@This()) ParseError!Stmt { - const start = self.advanceTok().loc.start; - - if (self.matchKeyword(.default)) { - if (self.peek() == .function or self.peek() == .async or self.peek() == .class) { - const decl = try self.parseStatementListItem(); - self.semicolon(); - return Stmt{ .loc = .{ .start = start, .end = decl.loc.end }, .data = decl.data }; - } - const expr = try self.parseExpr(0); - self.semicolon(); - return Stmt{ .loc = .{ .start = start, .end = expr.loc.end }, .data = .{ .expr = .{ .loc = expr.loc, .expr = expr } } }; - } - - if (self.peek() == .@"*") { - self.advance(); - try self.expect(.identifier); // from - const source_tok = try self.expectTok(.string); - _ = self.tokenSlice(source_tok); - try self.expect(.semicolon); - return Stmt{ .loc = .{ .start = start, .end = self.tok().loc.start }, .data = .{ .empty = {} } }; - } - - if (self.peek() == .lbrace) { - self.advance(); - while (self.peek() != .rbrace and self.peek() != .eof) { - _ = self.advanceTok(); - _ = self.match(.identifier); // as - if (!self.match(.comma)) break; - } - try self.expect(.rbrace); - if (self.matchKeyword(.from)) { - _ = self.advanceTok(); - } - try self.expect(.semicolon); - return Stmt{ .loc = .{ .start = start, .end = self.tok().loc.start }, .data = .{ .empty = {} } }; - } - - const decl = try self.parseStatementListItem(); - self.semicolon(); - return decl; - } - - fn parseExpr(self: *@This(), min_bp: u32) ParseError!*const Expr { - var left = try self.parsePrimaryExpr(); - - while (true) { - const cur_bp = self.bp(self.peek()); - if (cur_bp <= min_bp) break; - - switch (self.peek()) { - .@"=", - .@"+=", - .@"-=", - .@"*=", - .@"/=", - .@"%=", - .@"**=", - .@"<<=", - .@">>=", - .@">>>=", - .@"&=", - .@"|=", - .@"^=", - .@"&&=", - .@"||=", - .@"??=", - => { - self.advance(); - const op = self.assignOpFromToken(); - const right = try self.parseExpr(BP.assign); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .assign = .{ .loc = loc, .op = op, .left = left, .right = right } }, loc); - }, - - .@"?" => { - self.advance(); - const consequent = try self.parseExpr(0); - try self.expect(.@":"); - const alternate = try self.parseExpr(BP.conditional); - const loc: Loc = .{ .start = left.loc.start, .end = alternate.loc.end }; - left = self.arena.exprPtr(.{ .conditional = .{ .loc = loc, .condition = left, .consequent = consequent, .alternate = alternate } }, loc); - }, - - .@"??" => { - self.advance(); - const right = try self.parseExpr(BP.coalesce); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"??", .left = left, .right = right } }, loc); - }, - - .@"||" => { - self.advance(); - const right = try self.parseExpr(BP.log_or); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"||", .left = left, .right = right } }, loc); - }, - - .@"&&" => { - self.advance(); - const right = try self.parseExpr(BP.log_and); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"&&", .left = left, .right = right } }, loc); - }, - - .@"|" => { - self.advance(); - const right = try self.parseExpr(BP.bit_or); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"|", .left = left, .right = right } }, loc); - }, - - .@"^" => { - self.advance(); - const right = try self.parseExpr(BP.bit_xor); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"^", .left = left, .right = right } }, loc); - }, - - .@"&" => { - self.advance(); - const right = try self.parseExpr(BP.bit_and); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"&", .left = left, .right = right } }, loc); - }, - - .@"==" => { - self.advance(); - const right = try self.parseExpr(BP.equality); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"==", .left = left, .right = right } }, loc); - }, - - .@"!=" => { - self.advance(); - const right = try self.parseExpr(BP.equality); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"!=", .left = left, .right = right } }, loc); - }, - - .@"===" => { - self.advance(); - const right = try self.parseExpr(BP.equality); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"===", .left = left, .right = right } }, loc); - }, - - .@"!==" => { - self.advance(); - const right = try self.parseExpr(BP.equality); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"!==", .left = left, .right = right } }, loc); - }, - - .@"<" => { - self.advance(); - const right = try self.parseExpr(BP.relational); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"<", .left = left, .right = right } }, loc); - }, - - .@">" => { - self.advance(); - const right = try self.parseExpr(BP.relational); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@">", .left = left, .right = right } }, loc); - }, - - .@"<=" => { - self.advance(); - const right = try self.parseExpr(BP.relational); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"<=", .left = left, .right = right } }, loc); - }, - - .@">=" => { - self.advance(); - const right = try self.parseExpr(BP.relational); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@">=", .left = left, .right = right } }, loc); - }, - - .in => { - self.advance(); - const right = try self.parseExpr(BP.relational); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .in, .left = left, .right = right } }, loc); - }, - - .instanceof => { - self.advance(); - const right = try self.parseExpr(BP.relational); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .instanceof, .left = left, .right = right } }, loc); - }, - - .@"<<" => { - self.advance(); - const right = try self.parseExpr(BP.shift); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"<<", .left = left, .right = right } }, loc); - }, - - .@">>" => { - self.advance(); - const right = try self.parseExpr(BP.shift); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@">>", .left = left, .right = right } }, loc); - }, - - .@">>>" => { - self.advance(); - const right = try self.parseExpr(BP.shift); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@">>>", .left = left, .right = right } }, loc); - }, - - .@"+" => { - self.advance(); - const right = try self.parseExpr(BP.additive); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"+", .left = left, .right = right } }, loc); - }, - - .@"-" => { - self.advance(); - const right = try self.parseExpr(BP.additive); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"-", .left = left, .right = right } }, loc); - }, - - .@"*" => { - self.advance(); - const right = try self.parseExpr(BP.multiplicative); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"*", .left = left, .right = right } }, loc); - }, - - .@"/" => { - self.advance(); - const right = try self.parseExpr(BP.multiplicative); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"/", .left = left, .right = right } }, loc); - }, - - .@"%" => { - self.advance(); - const right = try self.parseExpr(BP.multiplicative); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"%", .left = left, .right = right } }, loc); - }, - - .@"**" => { - self.advance(); - const right = try self.parseExpr(BP.exponentiation - 1); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - left = self.arena.exprPtr(.{ .binary = .{ .loc = loc, .op = .@"**", .left = left, .right = right } }, loc); - }, - - .lparen => { - self.advance(); - var args: [256]Expr = undefined; - var arg_count: usize = 0; - - if (self.peek() != .rparen) { - while (true) { - if (self.peek() == .@"...") { - self.advance(); - const arg = try self.parseExpr(0); - args[arg_count] = Expr{ .loc = arg.loc, .data = .{ .spread = .{ .loc = arg.loc, .arg = self.arena.exprPtr(arg.data, arg.loc) } } }; - arg_count += 1; - } else { - const arg = try self.parseExpr(0); - args[arg_count] = arg.*; - arg_count += 1; - } - if (!self.match(.comma)) break; - } - } - - try self.expect(.rparen); - const loc: Loc = .{ .start = left.loc.start, .end = self.tok().loc.start }; - left = self.arena.exprPtr(.{ .call = .{ .loc = loc, .callee = left, .args = args[0..arg_count], .optional = false } }, loc); - }, - - .@"?." => { - self.advance(); - if (self.peek() == .lparen) { - self.advance(); - var args: [256]Expr = undefined; - var arg_count: usize = 0; - if (self.peek() != .rparen) { - while (true) { - const arg = try self.parseExpr(0); - args[arg_count] = arg.*; - arg_count += 1; - if (!self.match(.comma)) break; - } - } - try self.expect(.rparen); - const loc: Loc = .{ .start = left.loc.start, .end = self.tok().loc.start }; - left = self.arena.exprPtr(.{ .call = .{ .loc = loc, .callee = left, .args = args[0..arg_count], .optional = true } }, loc); - } else if (self.peek() == .lbracket) { - self.advance(); - const expr = try self.parseExpr(0); - try self.expect(.rbracket); - const loc: Loc = .{ .start = left.loc.start, .end = self.tok().loc.start }; - left = self.arena.exprPtr(.{ .computed_member = .{ .loc = loc, .obj = left, .expr = expr } }, loc); - } else if (self.peek() == .identifier or self.peek().isKeyword()) { - const prop_tok = self.advanceTok(); - const prop = self.tokenSlice(prop_tok); - const loc: Loc = .{ .start = left.loc.start, .end = prop_tok.loc.end }; - left = self.arena.exprPtr(.{ .member = .{ .loc = loc, .obj = left, .prop = .{ .ident = prop } } }, loc); - } else if (self.peek() == .private_identifier) { - const prop_tok = self.advanceTok(); - const prop = self.tokenSlice(prop_tok); - const loc: Loc = .{ .start = left.loc.start, .end = prop_tok.loc.end }; - left = self.arena.exprPtr(.{ .member = .{ .loc = loc, .obj = left, .prop = .{ .private = prop } } }, loc); - } - }, - - .lbracket => { - self.advance(); - const expr = try self.parseExpr(0); - try self.expect(.rbracket); - const loc: Loc = .{ .start = left.loc.start, .end = self.tok().loc.start }; - left = self.arena.exprPtr(.{ .computed_member = .{ .loc = loc, .obj = left, .expr = expr } }, loc); - }, - - .@"." => { - self.advance(); - if (self.peek() == .private_identifier) { - const prop_tok = self.advanceTok(); - const prop = self.tokenSlice(prop_tok); - const loc: Loc = .{ .start = left.loc.start, .end = prop_tok.loc.end }; - left = self.arena.exprPtr(.{ .member = .{ .loc = loc, .obj = left, .prop = .{ .private = prop } } }, loc); - } else { - const prop_tok = try self.expectTok(.identifier); - const prop = self.tokenSlice(prop_tok); - const loc: Loc = .{ .start = left.loc.start, .end = prop_tok.loc.end }; - left = self.arena.exprPtr(.{ .member = .{ .loc = loc, .obj = left, .prop = .{ .ident = prop } } }, loc); - } - }, - - .template_head, .no_sub_template => { - const template = try self.parseTemplateLit(); - const loc: Loc = .{ .start = left.loc.start, .end = template.loc.end }; - left = self.arena.exprPtr(.{ .tagged_template = .{ .loc = loc, .tag = left, .quasi = template } }, loc); - }, - - .@"++" => { - if (!self.isLineTerminatorBeforeNext()) { - self.advance(); - const loc: Loc = .{ .start = left.loc.start, .end = left.loc.end + 2 }; - left = self.arena.exprPtr(.{ .update = .{ .loc = loc, .op = .@"++", .arg = left, .prefix = false } }, loc); - } else break; - }, - - .@"--" => { - if (!self.isLineTerminatorBeforeNext()) { - self.advance(); - const loc: Loc = .{ .start = left.loc.start, .end = left.loc.end + 2 }; - left = self.arena.exprPtr(.{ .update = .{ .loc = loc, .op = .@"--", .arg = left, .prefix = false } }, loc); - } else break; - }, - - .comma => { - self.advance(); - const right = try self.parseExpr(BP.comma); - const loc: Loc = .{ .start = left.loc.start, .end = right.loc.end }; - var exprs: [2]Expr = .{ left.*, right.* }; - left = self.arena.exprPtr(.{ .sequence = .{ .loc = loc, .exprs = &exprs } }, loc); - }, - - else => break, - } - } - - return left; - } - - fn parsePrimaryExpr(self: *@This()) ParseError!*const Expr { - const start = self.tok().loc.start; - - switch (self.peek()) { - .this => { - const t = self.advanceTok(); - return self.arena.exprPtr(.{ .this = {} }, .{ .start = start, .end = t.loc.end }); - }, - .super => { - const t = self.advanceTok(); - return self.arena.exprPtr(.{ .super = {} }, .{ .start = start, .end = t.loc.end }); - }, - .null => { - const t = self.advanceTok(); - return self.arena.exprPtr(.{ .null = {} }, .{ .start = start, .end = t.loc.end }); - }, - .true => { - const t = self.advanceTok(); - return self.arena.exprPtr(.{ .bool = true }, .{ .start = start, .end = t.loc.end }); - }, - .false => { - const t = self.advanceTok(); - return self.arena.exprPtr(.{ .bool = false }, .{ .start = start, .end = t.loc.end }); - }, - .number => { - const t = self.advanceTok(); - const val = std.fmt.parseFloat(f64, self.tokenSlice(t)) catch 0.0; - return self.arena.exprPtr(.{ .number = val }, .{ .start = start, .end = t.loc.end }); - }, - .string => { - const t = self.advanceTok(); - return self.arena.exprPtr(.{ .string = self.tokenSlice(t) }, .{ .start = start, .end = t.loc.end }); - }, - .bigint => { - const t = self.advanceTok(); - return self.arena.exprPtr(.{ .number = 0 }, .{ .start = start, .end = t.loc.end }); - }, - .regex => { - const t = self.advanceTok(); - const slice = self.tokenSlice(t); - const slash_pos = std.mem.indexOfScalar(u8, slice[1..], '/') orelse 0; - const pattern = slice[1 .. slash_pos + 1]; - const flags = slice[slash_pos + 2 ..]; - return self.arena.exprPtr( - .{ .regex = .{ .pattern = pattern, .flags = flags } }, - .{ .start = start, .end = t.loc.end }, - ); - }, - .identifier => { - const t = self.advanceTok(); - const name = self.tokenSlice(t); - return self.arena.exprPtr(.{ .identifier = name }, .{ .start = start, .end = t.loc.end }); - }, - .private_identifier => { - const t = self.advanceTok(); - const name = self.tokenSlice(t); - return self.arena.exprPtr(.{ .private_ident = name }, .{ .start = start, .end = t.loc.end }); - }, - .lbrace => return self.parseObjLiteral(), - .lbracket => return self.parseArrayLiteral(), - .lparen => { - self.advance(); - if (self.peek() == .rparen) { - self.advance(); - if (self.peek() == .@"=>") { - return self.parseArrowExpr(.{ .loc = .{ .start = start, .end = self.tok().loc.start }, .params = &.{} }); - } - return self.arena.exprPtr(.{ .identifier = "" }, .{ .start = start, .end = self.tok().loc.start }); - } - if (self.peek() == .@"...") { - self.advance(); - const arg = try self.parseExpr(0); - try self.expect(.rparen); - if (self.peek() == .@"=>") { - return self.parseArrowExpr(.{ .loc = .{ .start = start, .end = arg.loc.end }, .params = &.{} }); - } - const loc: Loc = .{ .start = start, .end = self.tok().loc.start }; - return self.arena.exprPtr(.{ .spread = .{ .loc = loc, .arg = arg } }, loc); - } - const expr = try self.parseExpr(0); - if (self.peek() == .comma) { - var params: [128]Pat = undefined; - var count: usize = 0; - params[count] = Pat{ .loc = expr.loc, .data = .{ .ident = expr.data.identifier } }; - count += 1; - while (self.match(.comma)) { - const p = try self.parseBindingPattern(); - params[count] = p; - count += 1; - } - try self.expect(.rparen); - if (self.peek() == .@"=>") { - return self.parseArrowExpr(.{ .loc = .{ .start = start, .end = self.tok().loc.start }, .params = params[0..count] }); - } - return self.arena.exprPtr(.{ .identifier = "" }, .{ .start = start, .end = self.tok().loc.start }); - } - try self.expect(.rparen); - if (self.peek() == .@"=>") { - const pat = Pat{ .loc = expr.loc, .data = .{ .ident = expr.data.identifier } }; - return self.parseArrowExpr(.{ .loc = .{ .start = start, .end = self.tok().loc.start }, .params = &.{pat} }); - } - return self.arena.exprPtr(.{ .parenthesized = expr }, .{ .start = start, .end = self.tok().loc.start }); - }, - .function => return self.parseFnExpr(), - .class => return self.parseClassExpr(), - .async => { - self.advance(); - if (self.peek() == .function) { - return self.parseFnExpr(); - } - const id_tok = try self.expectTok(.identifier); - const name = self.tokenSlice(id_tok); - if (self.peek() == .@"=>") { - const pat = Pat{ .loc = .{ .start = start, .end = id_tok.loc.end }, .data = .{ .ident = name } }; - return self.parseArrowExpr(.{ .loc = .{ .start = start, .end = id_tok.loc.end }, .params = &.{pat} }); - } - return self.arena.exprPtr(.{ .identifier = name }, .{ .start = start, .end = id_tok.loc.end }); - }, - .new => { - self.advance(); - const callee = try self.parseExpr(BP.member); - var args: [256]Expr = undefined; - var arg_count: usize = 0; - if (self.peek() == .lparen) { - self.advance(); - if (self.peek() != .rparen) { - while (true) { - const arg = try self.parseExpr(0); - args[arg_count] = arg.*; - arg_count += 1; - if (!self.match(.comma)) break; - } - } - try self.expect(.rparen); - } - const loc: Loc = .{ .start = start, .end = if (arg_count > 0) args[arg_count - 1].loc.end else callee.loc.end }; - return self.arena.exprPtr(.{ .new = .{ .loc = loc, .callee = callee, .args = args[0..arg_count] } }, loc); - }, - .delete, .typeof, .void, .@"!", .@"~", .@"+", .@"-" => { - const op = self.unaryOpFromToken(); - self.advance(); - const arg = try self.parseExpr(BP.unary); - const loc: Loc = .{ .start = start, .end = arg.loc.end }; - return self.arena.exprPtr(.{ .unary = .{ .loc = loc, .op = op, .arg = arg, .prefix = true } }, loc); - }, - .@"++" => { - self.advance(); - const arg = try self.parseExpr(BP.update); - const loc: Loc = .{ .start = start, .end = arg.loc.end }; - return self.arena.exprPtr(.{ .update = .{ .loc = loc, .op = .@"++", .arg = arg, .prefix = true } }, loc); - }, - .@"--" => { - self.advance(); - const arg = try self.parseExpr(BP.update); - const loc: Loc = .{ .start = start, .end = arg.loc.end }; - return self.arena.exprPtr(.{ .update = .{ .loc = loc, .op = .@"--", .arg = arg, .prefix = true } }, loc); - }, - .await => { - self.advance(); - const arg = try self.parseExpr(BP.unary); - const loc: Loc = .{ .start = start, .end = arg.loc.end }; - return self.arena.exprPtr(.{ .await = .{ .loc = loc, .arg = arg } }, loc); - }, - .yield => { - self.advance(); - var delegate = false; - var arg: ?*const Expr = null; - if (!self.isLineTerminatorBeforeNext()) { - if (self.match(.@"*")) { - delegate = true; - } - if (self.peek() != .rbrace and self.peek() != .rparen and self.peek() != .rbracket and self.peek() != .semicolon and self.peek() != .comma and self.peek() != .@":" and self.peek() != .eof) { - arg = try self.parseExpr(0); - } - } - const loc: Loc = .{ .start = start, .end = if (arg) |a| a.loc.end else start + 5 }; - return self.arena.exprPtr(.{ .yield = .{ .loc = loc, .arg = arg, .delegate = delegate } }, loc); - }, - .template_head, .no_sub_template => return self.arena.exprPtr(.{ .template = try self.parseTemplateLit() }, .{ .start = start, .end = self.tok().loc.start }), - .import => { - self.advance(); - try self.expect(.lparen); - _ = try self.parseExpr(0); - try self.expect(.rparen); - return self.arena.exprPtr(.{ .identifier = "import" }, .{ .start = start, .end = self.tok().loc.start }); - }, - .@"#" => { - self.advance(); - const id_tok = try self.expectTok(.identifier); - return self.arena.exprPtr(.{ .private_ident = self.tokenSlice(id_tok) }, .{ .start = start, .end = id_tok.loc.end }); - }, - else => { - if (self.peek().isIdentifier()) { - const t = self.advanceTok(); - const name = self.tokenSlice(t); - if (self.peek() == .@"=>") { - const pat = Pat{ .loc = .{ .start = t.loc.start, .end = t.loc.end }, .data = .{ .ident = name } }; - return self.parseArrowExpr(.{ .loc = .{ .start = t.loc.start, .end = t.loc.end }, .params = &.{pat} }); - } - return self.arena.exprPtr(.{ .identifier = name }, .{ .start = t.loc.start, .end = t.loc.end }); - } - return ParseError.ExpectedExpression; - }, - } - } - - fn parseArrowExpr(self: *@This(), params_info: struct { loc: Loc, params: []const Pat }) ParseError!*const Expr { - try self.expect(.@"=>"); - const async_token = false; - - if (self.peek() == .lbrace) { - const body = try self.parseFunctionBody(); - return self.arena.exprPtr( - .{ .arrow = .{ .loc = .{ .start = params_info.loc.start, .end = body.loc.end }, .async_token = async_token, .params = params_info.params, .body = .{ .block = body } } }, - .{ .start = params_info.loc.start, .end = body.loc.end }, - ); - } - - const expr = try self.parseExpr(0); - return self.arena.exprPtr( - .{ .arrow = .{ .loc = .{ .start = params_info.loc.start, .end = expr.loc.end }, .async_token = async_token, .params = params_info.params, .body = .{ .expr = expr } } }, - .{ .start = params_info.loc.start, .end = expr.loc.end }, - ); - } - - fn parseObjLiteral(self: *@This()) ParseError!*const Expr { - const start = self.advanceTok().loc.start; - var props: [128]Prop = undefined; - var count: usize = 0; - - while (self.peek() != .rbrace and self.peek() != .eof) { - if (self.peek() == .@"...") { - self.advance(); - const arg = try self.parseExpr(0); - props[count] = .{ .loc = arg.loc, .key = .{ .ident = "" }, .data = .{ .spread = .{ .loc = arg.loc, .arg = arg } } }; - count += 1; - } else if (self.peek() == .identifier) { - const name_tok = self.tok(); - const name = self.tokenSlice(name_tok); - self.advance(); - if (self.peek() == .@":") { - self.advance(); - const value = try self.parseExpr(0); - props[count] = .{ .loc = .{ .start = name_tok.loc.start, .end = value.loc.end }, .key = .{ .ident = name }, .data = .{ .init = .{ .key = .{ .ident = name }, .value = value } } }; - count += 1; - } else if (self.peek() == .lparen) { - const params = try self.parseParams(); - const body = try self.parseFunctionBody(); - props[count] = .{ .loc = .{ .start = name_tok.loc.start, .end = body.loc.end }, .key = .{ .ident = name }, .data = .{ .method = .{ .loc = .{ .start = name_tok.loc.start, .end = body.loc.end }, .fn_type = .normal, .id = null, .params = params, .body = body } } }; - count += 1; - } else if (self.peek() == .@"=") { - self.advance(); - const value = try self.parseExpr(0); - props[count] = .{ .loc = .{ .start = name_tok.loc.start, .end = value.loc.end }, .key = .{ .ident = name }, .data = .{ .init = .{ .key = .{ .ident = name }, .value = value } } }; - count += 1; - } else if (self.peek() == .comma or self.peek() == .rbrace) { - props[count] = .{ .loc = .{ .start = name_tok.loc.start, .end = name_tok.loc.end }, .key = .{ .ident = name }, .data = .{ .shorthand = name } }; - count += 1; - } - } else if (self.peek() == .number or self.peek() == .string) { - const key = try self.parsePropKey(); - try self.expect(.@":"); - const value = try self.parseExpr(0); - props[count] = .{ .loc = .{ .start = start, .end = value.loc.end }, .key = key, .data = .{ .init = .{ .key = key, .value = value } } }; - count += 1; - } else if (self.peek() == .lbracket) { - const key = try self.parsePropKey(); - try self.expect(.@":"); - const value = try self.parseExpr(0); - props[count] = .{ .loc = .{ .start = start, .end = value.loc.end }, .key = key, .data = .{ .init = .{ .key = key, .value = value } } }; - count += 1; - } else if (self.matchKeyword(.get)) { - const key = try self.parsePropKey(); - try self.expect(.lparen); - try self.expect(.rparen); - const body = try self.parseFunctionBody(); - props[count] = .{ .loc = .{ .start = start, .end = body.loc.end }, .key = key, .data = .{ .get = .{ .key = key, .body = body } } }; - count += 1; - } else if (self.matchKeyword(.set)) { - const key = try self.parsePropKey(); - try self.expect(.lparen); - const param = try self.parseBindingPattern(); - try self.expect(.rparen); - const body = try self.parseFunctionBody(); - props[count] = .{ .loc = .{ .start = start, .end = body.loc.end }, .key = key, .data = .{ .set = .{ .key = key, .param = param, .body = body } } }; - count += 1; - } else if (self.match(.@"*")) { - const key = try self.parsePropKey(); - const params = try self.parseParams(); - const body = try self.parseFunctionBody(); - props[count] = .{ .loc = .{ .start = start, .end = body.loc.end }, .key = key, .data = .{ .method = .{ .loc = .{ .start = start, .end = body.loc.end }, .fn_type = .generator, .id = null, .params = params, .body = body } } }; - count += 1; - } else { - break; - } - - if (!self.match(.comma)) break; - } - - try self.expect(.rbrace); - return self.arena.exprPtr(.{ .object = .{ .loc = .{ .start = start, .end = self.tok().loc.start }, .props = props[0..count] } }, .{ .start = start, .end = self.tok().loc.start }); - } - - fn parseArrayLiteral(self: *@This()) ParseError!*const Expr { - const start = self.advanceTok().loc.start; - var elems: [256]?Expr = undefined; - var count: usize = 0; - - while (self.peek() != .rbracket and self.peek() != .eof) { - if (self.match(.comma)) { - elems[count] = null; - count += 1; - } else if (self.peek() == .@"...") { - self.advance(); - const arg = try self.parseExpr(0); - elems[count] = Expr{ .loc = arg.loc, .data = .{ .spread = .{ .loc = arg.loc, .arg = arg } } }; - count += 1; - if (!self.match(.comma)) break; - } else { - const expr = try self.parseExpr(0); - elems[count] = expr.*; - count += 1; - if (!self.match(.comma)) break; - } - } - - try self.expect(.rbracket); - return self.arena.exprPtr(.{ .array = .{ .loc = .{ .start = start, .end = self.tok().loc.start }, .elems = elems[0..count] } }, .{ .start = start, .end = self.tok().loc.start }); - } - - fn parseTemplateLit(self: *@This()) ParseError!TemplateLit { - const start = self.tok().loc.start; - var quasis: [64]TemplateElem = undefined; - var exprs: [64]Expr = undefined; - var q_count: usize = 0; - var e_count: usize = 0; - - while (true) { - switch (self.peek()) { - .no_sub_template => { - const t = self.advanceTok(); - const slice = self.tokenSlice(t); - quasis[q_count] = .{ .loc = .{ .start = t.loc.start, .end = t.loc.end }, .value = slice, .tail = true }; - q_count += 1; - break; - }, - .template_head => { - const t = self.advanceTok(); - const slice = self.tokenSlice(t); - quasis[q_count] = .{ .loc = .{ .start = t.loc.start, .end = t.loc.end }, .value = slice, .tail = false }; - q_count += 1; - const expr = try self.parseExpr(0); - exprs[e_count] = expr.*; - e_count += 1; - try self.expect(.rbrace); - }, - .template_middle => { - const t = self.advanceTok(); - const slice = self.tokenSlice(t); - quasis[q_count] = .{ .loc = .{ .start = t.loc.start, .end = t.loc.end }, .value = slice, .tail = false }; - q_count += 1; - const expr = try self.parseExpr(0); - exprs[e_count] = expr.*; - e_count += 1; - try self.expect(.rbrace); - }, - .template_tail => { - const t = self.advanceTok(); - const slice = self.tokenSlice(t); - quasis[q_count] = .{ .loc = .{ .start = t.loc.start, .end = t.loc.end }, .value = slice, .tail = true }; - q_count += 1; - break; - }, - else => break, - } - } - - return .{ .loc = .{ .start = start, .end = self.tok().loc.start }, .quasis = quasis[0..q_count], .exprs = exprs[0..e_count] }; - } - - fn parsePropKey(self: *@This()) ParseError!PropKey { - switch (self.peek()) { - .identifier, .let, .static, .get, .set, .async => { - const t = self.advanceTok(); - return PropKey{ .ident = self.tokenSlice(t) }; - }, - .string => { - const t = self.advanceTok(); - return PropKey{ .string = self.tokenSlice(t) }; - }, - .number => { - const t = self.advanceTok(); - const val = std.fmt.parseFloat(f64, self.tokenSlice(t)) catch 0.0; - return PropKey{ .number = val }; - }, - .lbracket => { - self.advance(); - const expr = try self.parseExpr(0); - try self.expect(.rbracket); - return PropKey{ .computed = expr }; - }, - .private_identifier => { - const t = self.advanceTok(); - return PropKey{ .private = self.tokenSlice(t) }; - }, - else => return ParseError.ExpectedPropertyName, - } - } - - fn parseBindingPattern(self: *@This()) ParseError!Pat { - const start = self.tok().loc.start; - - switch (self.peek()) { - .identifier, .await, .yield => { - const t = self.advanceTok(); - const name = self.tokenSlice(t); - return Pat{ .loc = .{ .start = start, .end = t.loc.end }, .data = .{ .ident = name } }; - }, - .lbrace => { - self.advance(); - var props: [128]PatProp = undefined; - var count: usize = 0; - var rest: ?*const Pat = null; - - while (self.peek() != .rbrace and self.peek() != .eof) { - if (self.peek() == .@"...") { - self.advance(); - const pat = try self.parseBindingPattern(); - rest = self.arena.patPtr(pat.data, pat.loc); - break; - } - if (self.peek() == .identifier) { - const name_tok = self.tok(); - const name = self.tokenSlice(name_tok); - self.advance(); - if (self.peek() == .@":") { - self.advance(); - const val_pat = try self.parseBindingPattern(); - props[count] = .{ .key_value = .{ .key = .{ .ident = name }, .value = self.arena.patPtr(val_pat.data, val_pat.loc) } }; - count += 1; - } else { - props[count] = .{ .shorthand = name }; - count += 1; - } - } else if (self.peek() == .lbracket) { - const key = try self.parsePropKey(); - try self.expect(.@":"); - const val_pat = try self.parseBindingPattern(); - props[count] = .{ .key_value = .{ .key = key, .value = self.arena.patPtr(val_pat.data, val_pat.loc) } }; - count += 1; - } else { - break; - } - if (!self.match(.comma)) break; - } - - try self.expect(.rbrace); - return Pat{ .loc = .{ .start = start, .end = self.tok().loc.start }, .data = .{ .object = .{ .loc = .{ .start = start, .end = self.tok().loc.start }, .props = props[0..count], .rest = rest } } }; - }, - .lbracket => { - self.advance(); - var elems: [128]?Pat = undefined; - var count: usize = 0; - var rest: ?*const Pat = null; - - while (self.peek() != .rbracket and self.peek() != .eof) { - if (self.match(.comma)) { - elems[count] = null; - count += 1; - } else if (self.peek() == .@"...") { - self.advance(); - const pat = try self.parseBindingPattern(); - rest = self.arena.patPtr(pat.data, pat.loc); - break; - } else { - const pat = try self.parseBindingPattern(); - elems[count] = pat; - count += 1; - if (!self.match(.comma)) break; - } - } - - try self.expect(.rbracket); - return Pat{ .loc = .{ .start = start, .end = self.tok().loc.start }, .data = .{ .array = .{ .loc = .{ .start = start, .end = self.tok().loc.start }, .elems = elems[0..count], .rest = rest } } }; - }, - else => return ParseError.ExpectedParameterName, - } - } - - fn bp(_: *@This(), kind: TokenType) u32 { - return switch (kind) { - .comma => BP.comma, - .@"=", .@"+=", .@"-=", .@"*=", .@"/=", .@"%=", .@"**=", .@"<<=", .@">>=", .@">>>=", .@"&=", .@"|=", .@"^=", .@"&&=", .@"||=", .@"??=" => BP.assign, - .@"?" => BP.conditional, - .@"??" => BP.coalesce, - .@"||" => BP.log_or, - .@"&&" => BP.log_and, - .@"|" => BP.bit_or, - .@"^" => BP.bit_xor, - .@"&" => BP.bit_and, - .@"==", .@"!=", .@"===", .@"!==" => BP.equality, - .@"<", .@">", .@"<=", .@">=", .in, .instanceof => BP.relational, - .@"<<", .@">>", .@">>>" => BP.shift, - .@"+", .@"-" => BP.additive, - .@"*", .@"/", .@"%" => BP.multiplicative, - .@"**" => BP.exponentiation, - .lparen => BP.call, - .lbracket, .@".", .@"?." => BP.member, - .@"++", .@"--" => BP.update, - .template_head, .no_sub_template => BP.member, - else => 0, - }; - } - - fn unaryOpFromToken(self: *@This()) UnaryOp { - return switch (self.tok().kind) { - .@"+" => .@"+", - .@"-" => .@"-", - .@"!" => .@"!", - .@"~" => .@"~", - .typeof => .typeof, - .void => .void, - .delete => .delete, - else => .@"+", - }; - } - - fn assignOpFromToken(self: *@This()) AssignOp { - return switch (self.tokens[self.pos - 1].kind) { - .@"=" => .@"=", - .@"+=" => .@"+=", - .@"-=" => .@"-=", - .@"*=" => .@"*=", - .@"/=" => .@"/=", - .@"%=" => .@"%=", - .@"**=" => .@"**=", - .@"<<=" => .@"<<=", - .@">>=" => .@">>=", - .@">>>=" => .@">>>=", - .@"&=" => .@"&=", - .@"|=" => .@"|=", - .@"^=" => .@"^=", - .@"&&=" => .@"&&=", - .@"||=" => .@"||=", - .@"??=" => .@"??=", - else => .@"=", - }; - } - - fn semicolon(self: *@This()) void { - if (self.peek() == .semicolon) { - self.advance(); - } - } - - fn statementPointer(self: *@This()) ParseError!*const Stmt { - const s = try self.parseStatement(); - return self.arena.stmtPtr(s.data, s.loc); - } -}; - -pub const Node = union(enum) { - program: Program, - - stmt: Stmt, - expr: Expr, - pat: Pat, - - decl: Decl, - literal: Lit, - property: Prop, - template: TemplateLit, - spread: SpreadElem, - decorator: Decorator, - - import_specifier: ImportSpecifier, - export_specifier: ExportSpecifier, - import_attr: ImportAttribute, - catch_clause: CatchClause, - switch_case: SwitchCase, -}; - -pub const Program = struct { - body: []const Stmt, - loc: Loc, - - pub fn parse(comptime source: []const u8) ParseError!Program { - return comptime blk: { - var token_buf: [4096]Token = undefined; - const tokens = lex.Lexer.tokenizeBuf(source, &token_buf); - var arena: NodeArena = .{}; - var parser = Parser.init(tokens, source, &arena); - break :blk try parser.parseProgram(); - }; - } - - pub fn fmt(self: @This(), f: *Formatter) void { - @setEvalBranchQuota(100000); - for (self.body, 0..) |stmt, i| { - if (i > 0) f.newline(); - stmt.fmt(f); - } - } -}; - -pub const StmtType = union(enum) { - block: BlockStmt, - empty: void, - debugger: void, - expr: ExprStmt, - @"if": IfStmt, - @"while": WhileStmt, - do_while: DoWhileStmt, - @"for": ForStmt, - for_in: ForInStmt, - for_of: ForOfStmt, - @"continue": ContinueStmt, - @"break": BreakStmt, - @"return": ReturnStmt, - @"switch": SwitchStmt, - throw: ThrowStmt, - @"try": TryStmt, - labelled: LabelledStmt, - with: WithStmt, - variable: VarStmt, - lexical: LexicalDecl, - function: FnDecl, - class: ClassDecl, - using: UsingStmt, - import: ImportDecl, - @"export": ExportDecl, -}; - -pub const Stmt = struct { - loc: Loc, - data: StmtType, - - pub fn fmt(self: @This(), f: *Formatter) void { - switch (self.data) { - .block => |b| b.fmt(f), - .empty => f.writeChar(';'), - .debugger => f.write("debugger;"), - .expr => |e| { - e.expr.*.fmt(f); - f.writeChar(';'); - }, - .@"if" => |s| s.fmt(f), - .@"while" => |w| w.fmt(f), - .do_while => |d| d.fmt(f), - .@"for" => |fo| fo.fmt(f), - .for_in => |fi| fi.fmt(f), - .for_of => |fo| fo.fmt(f), - .@"continue" => |c| { - f.write("continue"); - if (c.label) |l| { - f.writeChar(' '); - f.write(l); - } - f.writeChar(';'); - }, - .@"break" => |b| { - f.write("break"); - if (b.label) |l| { - f.writeChar(' '); - f.write(l); - } - f.writeChar(';'); - }, - .@"return" => |r| { - f.write("return"); - if (r.arg) |a| { - f.writeChar(' '); - a.*.fmt(f); - } - f.writeChar(';'); - }, - .@"switch" => |s| s.fmt(f), - .throw => |t| { - f.write("throw "); - t.arg.*.fmt(f); - f.writeChar(';'); - }, - .@"try" => |t| t.fmt(f), - .labelled => |l| { - f.write(l.label); - f.write(": "); - l.body.*.fmt(f); - }, - .with => |w| { - f.write("with ("); - w.obj.*.fmt(f); - f.write(") "); - w.body.*.fmt(f); - }, - .variable => |v| v.fmt(f), - .lexical => |l| l.fmt(f), - .using => |u| { - f.write("using "); - for (u.decls, 0..) |d, i| { - if (i > 0) f.write(", "); - d.fmt(f); - } - f.writeChar(';'); - }, - .import => |i| i.fmt(f), - .@"export" => |e| e.fmt(f), - .class => |c| c.fmt(f), - .function => |d| d.fmt(f), - } - } -}; - -pub const ExprType = union(enum) { - identifier: []const u8, - this: void, - super: void, - null: void, - bool: bool, - number: f64, - string: []const u8, - regex: Regex, - array: ArrayExpr, - object: ObjectExpr, - func: FnExpr, - arrow: ArrowFn, - class: ClassExpr, - template: TemplateLit, - tagged_template: TaggedTemplate, - member: MemberExpr, - computed_member: ComputedMember, - call: CallExpr, - new: NewExpr, - chain: ChainExpr, - unary: UnaryExpr, - binary: BinaryExpr, - update: UpdateExpr, - conditional: IfExpr, - assign: AssignExpr, - sequence: SeqExpr, - spread: SpreadElem, - yield: YieldExpr, - await: AwaitExpr, - meta_prop: MetaProp, - parenthesized: *const Expr, - private_ident: []const u8, -}; - -pub const Expr = struct { - loc: Loc, - data: ExprType, - - pub fn fmt(self: @This(), f: *Formatter) void { - switch (self.data) { - .identifier => |name| f.write(name), - .this => f.write("this"), - .super => f.write("super"), - .null => f.write("null"), - .bool => |b| f.write(if (b) "true" else "false"), - .number => |n| { - var buf: [64]u8 = undefined; - f.write(std.fmt.bufPrint(&buf, "{d}", .{n}) catch "0"); - }, - .string => |s| { - f.writeChar('"'); - f.write(s); - f.writeChar('"'); - }, - .regex => |r| { - f.writeChar('/'); - f.write(r.pattern); - f.writeChar('/'); - f.write(r.flags); - }, - .array => |a| a.fmt(f), - .object => |o| o.fmt(f), - .func => |fn_expr| fn_expr.fmt(f), - .arrow => |arrow| arrow.fmt(f), - .class => |c| c.fmt(f), - .template => |t| t.fmt(f), - .tagged_template => |tt| tt.fmt(f), - .member => |m| m.fmt(f), - .computed_member => |cm| cm.fmt(f), - .call => |call| call.fmt(f), - .new => |n| { - f.write("new "); - n.callee.*.fmt(f); - f.writeChar('('); - for (n.args, 0..) |a, i| { - if (i > 0) f.write(", "); - a.fmt(f); - } - f.writeChar(')'); - }, - .chain => |c| c.expr.*.fmt(f), - .unary => |u| { - if (u.prefix) { - f.write(@tagName(u.op)); - u.arg.*.fmt(f); - } else { - u.arg.*.fmt(f); - f.write(@tagName(u.op)); - } - }, - .binary => |b| { - f.writeChar('('); - b.left.*.fmt(f); - f.writeChar(' '); - f.write(@tagName(b.op)); - f.writeChar(' '); - b.right.*.fmt(f); - f.writeChar(')'); - }, - .update => |u| { - const s = if (u.op == .@"++") "++" else "--"; - if (u.prefix) { - f.write(s); - u.arg.*.fmt(f); - } else { - u.arg.*.fmt(f); - f.write(s); - } - }, - .conditional => |c| { - c.condition.*.fmt(f); - f.write(" ? "); - c.consequent.*.fmt(f); - f.write(" : "); - c.alternate.*.fmt(f); - }, - .assign => |a| { - a.left.*.fmt(f); - f.writeChar(' '); - f.write(@tagName(a.op)); - f.writeChar(' '); - a.right.*.fmt(f); - }, - .sequence => |s| { - for (s.exprs, 0..) |e, i| { - if (i > 0) f.write(", "); - e.fmt(f); - } - }, - .spread => |s| { - f.write("..."); - s.arg.*.fmt(f); - }, - .yield => |y| { - f.write("yield"); - if (y.delegate) f.write("*"); - if (y.arg) |a| { - f.writeChar(' '); - a.*.fmt(f); - } - }, - .await => |a| { - f.write("await "); - a.arg.*.fmt(f); - }, - .meta_prop => |m| { - f.write(m.meta); - f.writeChar('.'); - f.write(m.prop); - }, - .parenthesized => |p| { - f.writeChar('('); - p.*.fmt(f); - f.writeChar(')'); - }, - .private_ident => |name| f.write(name), - } - } -}; - -pub const PatType = union(enum) { - ident: []const u8, - object: ObjectPat, - array: ArrayPat, - assign: AssignPat, - rest: RestPat, -}; - -pub const Pat = struct { - loc: Loc, - data: PatType, - - pub fn fmt(self: @This(), f: *Formatter) void { - switch (self.data) { - .ident => |name| f.write(name), - .object => |o| o.fmt(f), - .array => |a| a.fmt(f), - .assign => |a| { - a.left.*.fmt(f); - f.write(" = "); - a.right.*.fmt(f); - }, - .rest => |r| { - f.write("..."); - r.arg.*.fmt(f); - }, - } - } -}; - -pub const DeclType = union(enum) { - @"fn": FnDecl, - class: ClassDecl, - @"var": VarDecl, - using: UsingDecl, - import: ImportDecl, - @"export": ExportDecl, - export_default: ExportDefault, -}; - -pub const Decl = struct { - loc: Loc, - data: DeclType, -}; - -pub const LitType = union(enum) { - null: void, - bool: bool, - number: f64, - string: []const u8, - regex: Regex, - bigint: []const u8, -}; - -pub const Lit = struct { - loc: Loc, - data: LitType, - - pub fn fmt(self: @This(), f: *Formatter) void { - switch (self.data) { - .null => f.write("null"), - .bool => |b| f.write(if (b) "true" else "false"), - .number => |n| { - var buf: [64]u8 = undefined; - f.write(std.fmt.bufPrint(&buf, "{d}", .{n}) catch "0"); - }, - .string => |s| { - f.writeChar('"'); - f.write(s); - f.writeChar('"'); - }, - .regex => |r| { - f.writeChar('/'); - f.write(r.pattern); - f.writeChar('/'); - f.write(r.flags); - }, - .bigint => |s| { - f.write(s); - f.writeChar('n'); - }, - } - } -}; - -pub const Regex = struct { - pattern: []const u8, - flags: []const u8, -}; - -pub const PropType = union(enum) { - init: PropInit, - get: PropGet, - set: PropSet, - shorthand: []const u8, - spread: SpreadElem, - method: FnExpr, -}; - -pub const Prop = struct { - loc: Loc, - key: PropKey, - data: PropType, - - pub fn fmt(self: @This(), f: *Formatter) void { - switch (self.data) { - .init => |p_init| { - self.key.fmt(f); - f.write(": "); - p_init.value.*.fmt(f); - }, - .get => |g| g.fmt(f), - .set => |s| s.fmt(f), - .shorthand => |name| f.write(name), - .spread => |sp| { - f.write("..."); - sp.arg.*.fmt(f); - }, - .method => |m| m.fmt(f), - } - } -}; - -pub const PropKey = union(enum) { - ident: []const u8, - string: []const u8, - number: f64, - computed: *const Expr, - private: []const u8, -}; - -pub const PropInit = struct { - key: PropKey, - value: *const Expr, -}; - -pub const PropGet = struct { - key: PropKey, - body: BlockStmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("get "); - self.key.fmt(f); - f.write("() "); - self.body.fmt(f); - } -}; - -pub const PropSet = struct { - key: PropKey, - param: Pat, - body: BlockStmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("set "); - self.key.fmt(f); - f.writeChar('('); - self.param.fmt(f); - f.write(") "); - self.body.fmt(f); - } -}; - -pub const SpreadElem = struct { - loc: Loc, - arg: *const Expr, -}; - -pub const BlockStmt = struct { - loc: Loc, - body: []const Stmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.writeChar('{'); - if (self.body.len > 0) { - f.newline(); - f.indent_level += 1; - for (self.body) |s| { - f.writeIndent(); - s.fmt(f); - f.newline(); - } - f.indent_level -= 1; - f.writeIndent(); - } - f.writeChar('}'); - } -}; - -pub const ExprStmt = struct { - loc: Loc, - expr: *const Expr, -}; - -pub const IfStmt = struct { - loc: Loc, - condition: *const Expr, - consequent: *const Stmt, - alternate: ?*const Stmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("if ("); - self.condition.*.fmt(f); - f.write(") "); - self.consequent.*.fmt(f); - if (self.alternate) |alt| { - f.write(" else "); - alt.*.fmt(f); - } - } -}; - -pub const WhileStmt = struct { - loc: Loc, - condition: *const Expr, - body: *const Stmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("while ("); - self.condition.*.fmt(f); - f.write(") "); - self.body.*.fmt(f); - } -}; - -pub const DoWhileStmt = struct { - loc: Loc, - body: *const Stmt, - condition: *const Expr, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("do "); - self.body.*.fmt(f); - f.write(" while ("); - self.condition.*.fmt(f); - f.write(");"); - } -}; - -pub const ForInit = union(enum) { - expr: *const Expr, - decl: *const Decl, -}; - -pub const ForStmt = struct { - loc: Loc, - init: ?ForInit, - condition: ?*const Expr, - update: ?*const Expr, - body: *const Stmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("for ("); - if (self.init) |init| { - switch (init) { - .expr => |e| e.*.fmt(f), - .decl => |d| d.*.fmt(f), - } - } - f.writeChar(';'); - if (self.condition) |c| { - f.writeChar(' '); - c.*.fmt(f); - } - f.writeChar(';'); - if (self.update) |u| { - f.writeChar(' '); - u.*.fmt(f); - } - f.write(") "); - self.body.*.fmt(f); - } -}; - -pub const ForInStmt = struct { - loc: Loc, - left: ForInit, - right: *const Expr, - body: *const Stmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("for ("); - switch (self.left) { - .expr => |e| e.*.fmt(f), - .decl => |d| d.*.fmt(f), - } - f.write(" in "); - self.right.*.fmt(f); - f.write(") "); - self.body.*.fmt(f); - } -}; - -pub const ForOfStmt = struct { - loc: Loc, - await_token: bool, - left: ForInit, - right: *const Expr, - body: *const Stmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("for"); - if (self.await_token) f.write(" await"); - f.write(" ("); - switch (self.left) { - .expr => |e| e.*.fmt(f), - .decl => |d| d.*.fmt(f), - } - f.write(" of "); - self.right.*.fmt(f); - f.write(") "); - self.body.*.fmt(f); - } -}; - -pub const ContinueStmt = struct { - loc: Loc, - label: ?[]const u8, -}; - -pub const BreakStmt = struct { - loc: Loc, - label: ?[]const u8, -}; - -pub const ReturnStmt = struct { - loc: Loc, - arg: ?*const Expr, -}; - -pub const SwitchStmt = struct { - loc: Loc, - discriminant: *const Expr, - cases: []const SwitchCase, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("switch ("); - self.discriminant.*.fmt(f); - f.write(") {"); - f.newline(); - f.indent_level += 1; - for (self.cases) |c| { - f.writeIndent(); - c.fmt(f); - f.newline(); - } - f.indent_level -= 1; - f.writeIndent(); - f.writeChar('}'); - } -}; - -pub const SwitchCase = struct { - loc: Loc, - condition: ?*const Expr, - consequent: []const Stmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - if (self.condition) |c| { - f.write("case "); - c.*.fmt(f); - } else { - f.write("default"); - } - f.writeChar(':'); - for (self.consequent) |s| { - f.writeChar(' '); - s.fmt(f); - } - } -}; - -pub const ThrowStmt = struct { - loc: Loc, - arg: *const Expr, -}; - -pub const TryStmt = struct { - loc: Loc, - block: BlockStmt, - handler: ?CatchClause, - finalizer: ?BlockStmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("try "); - self.block.fmt(f); - if (self.handler) |h| { - f.writeChar(' '); - h.fmt(f); - } - if (self.finalizer) |fin| { - f.write(" finally "); - fin.fmt(f); - } - } -}; - -pub const CatchClause = struct { - loc: Loc, - param: ?Pat, - body: BlockStmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("catch"); - if (self.param) |p| { - f.write(" ("); - p.fmt(f); - f.write(") "); - } else { - f.writeChar(' '); - } - self.body.fmt(f); - } -}; - -pub const LabelledStmt = struct { - loc: Loc, - label: []const u8, - body: *const Stmt, -}; - -pub const WithStmt = struct { - loc: Loc, - obj: *const Expr, - body: *const Stmt, -}; - -pub const VarStmt = struct { - loc: Loc, - kind: VarKind, - decls: []const VarDeclarator, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write(@tagName(self.kind)); - f.writeChar(' '); - for (self.decls, 0..) |d, i| { - if (i > 0) f.write(", "); - d.fmt(f); - } - f.writeChar(';'); - } -}; - -pub const UsingStmt = struct { - loc: Loc, - decls: []const VarDeclarator, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("using "); - for (self.decls, 0..) |d, i| { - if (i > 0) f.write(", "); - d.fmt(f); - } - } -}; - -pub const VarKind = enum { - @"var", - let, - @"const", -}; - -pub const VarDecl = struct { - loc: Loc, - kind: VarKind, - decls: []const VarDeclarator, -}; - -pub const LexicalDecl = struct { - loc: Loc, - kind: VarKind, - decls: []const VarDeclarator, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write(@tagName(self.kind)); - f.writeChar(' '); - for (self.decls, 0..) |d, i| { - if (i > 0) f.write(", "); - d.fmt(f); - } - f.writeChar(';'); - } -}; - -pub const UsingDecl = struct { - loc: Loc, - is_await: bool, - decls: []const VarDeclarator, -}; - -pub const VarDeclarator = struct { - loc: Loc, - id: Pat, - init: ?*const Expr, - - pub fn fmt(self: @This(), f: *Formatter) void { - self.id.fmt(f); - if (self.init) |init| { - f.write(" = "); - init.*.fmt(f); - } - } -}; - -pub const ObjectPat = struct { - loc: Loc, - props: []const PatProp, - rest: ?*const Pat, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.writeChar('{'); - var first = true; - for (self.props) |prop| { - if (!first) f.write(", "); - first = false; - switch (prop) { - .key_value => |kv| { - kv.key.fmt(f); - f.write(": "); - kv.value.*.fmt(f); - }, - .shorthand => |name| f.write(name), - .rest => |r| { - f.write("..."); - r.*.fmt(f); - }, - } - } - if (self.rest) |rest| { - if (!first) f.write(", "); - f.write("..."); - rest.*.fmt(f); - } - f.writeChar('}'); - } -}; - -pub const PatProp = union(enum) { - key_value: struct { - key: PropKey, - value: *const Pat, - }, - shorthand: []const u8, - rest: *const Pat, -}; - -pub const ArrayPat = struct { - loc: Loc, - elems: []const ?Pat, - rest: ?*const Pat, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.writeChar('['); - for (self.elems, 0..) |elem, i| { - if (i > 0) f.write(", "); - if (elem) |pat| pat.fmt(f); - } - if (self.rest) |rest| { - if (self.elems.len > 0) f.write(", "); - f.write("..."); - rest.*.fmt(f); - } - f.writeChar(']'); - } -}; - -pub const AssignPat = struct { - loc: Loc, - left: *const Pat, - right: *const Expr, -}; - -pub const RestPat = struct { - loc: Loc, - arg: *const Pat, -}; - -pub const FnType = union(enum) { - normal: void, - generator: void, - async: void, - async_generator: void, -}; - -pub const FnDecl = struct { - loc: Loc, - fn_type: FnType, - id: ?[]const u8, - params: []const Pat, - body: BlockStmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("function"); - if (self.fn_type == .generator or self.fn_type == .async_generator) { - f.write("*"); - } - if (self.fn_type == .async or self.fn_type == .async_generator) { - f.write(" async"); - } - if (self.id) |id| { - f.writeChar(' '); - f.write(id); - } - f.writeChar('('); - for (self.params, 0..) |p, i| { - if (i > 0) f.write(", "); - p.fmt(f); - } - f.write(") "); - self.body.fmt(f); - } -}; - -pub const FnExpr = struct { - loc: Loc, - fn_type: FnType, - id: ?[]const u8, - params: []const Pat, - body: BlockStmt, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("function"); - if (self.fn_type == .generator or self.fn_type == .async_generator) { - f.write("*"); - } - if (self.fn_type == .async or self.fn_type == .async_generator) { - f.write(" async"); - } - if (self.id) |id| { - f.writeChar(' '); - f.write(id); - } - f.writeChar('('); - for (self.params, 0..) |p, i| { - if (i > 0) f.write(", "); - p.fmt(f); - } - f.write(") "); - self.body.fmt(f); - } -}; - -pub const ArrowFn = struct { - loc: Loc, - async_token: bool, - params: []const Pat, - body: union(enum) { - block: BlockStmt, - expr: *const Expr, - }, - - pub fn fmt(self: @This(), f: *Formatter) void { - if (self.async_token) f.write("async "); - f.writeChar('('); - for (self.params, 0..) |p, i| { - if (i > 0) f.write(", "); - p.fmt(f); - } - f.write(") => "); - switch (self.body) { - .block => |b| b.fmt(f), - .expr => |e| e.*.fmt(f), - } - } -}; - -pub const ClassDecl = struct { - loc: Loc, - id: ?[]const u8, - super_class: ?*const Expr, - body: []const ClassElem, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("class"); - if (self.id) |id| { - f.writeChar(' '); - f.write(id); - } - if (self.super_class) |sc| { - f.write(" extends "); - sc.*.fmt(f); - } - f.write(" {"); - f.newline(); - f.indent_level += 1; - for (self.body) |elem| { - f.writeIndent(); - elem.fmt(f); - f.newline(); - } - f.indent_level -= 1; - f.writeIndent(); - f.writeChar('}'); - } -}; - -pub const ClassExpr = struct { - loc: Loc, - id: ?[]const u8, - super_class: ?*const Expr, - body: []const ClassElem, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("class"); - if (self.id) |id| { - f.writeChar(' '); - f.write(id); - } - if (self.super_class) |sc| { - f.write(" extends "); - sc.*.fmt(f); - } - f.write(" {"); - f.newline(); - f.indent_level += 1; - for (self.body) |elem| { - f.writeIndent(); - elem.fmt(f); - f.newline(); - } - f.indent_level -= 1; - f.writeIndent(); - f.writeChar('}'); - } -}; - -pub const ClassElem = union(enum) { - method: FnExpr, - get: PropGet, - set: PropSet, - field: FieldDef, - static_block: BlockStmt, - static_method: FnExpr, - static_get: PropGet, - static_set: PropSet, - static_field: FieldDef, -}; - -pub const FieldDef = struct { - loc: Loc, - key: PropKey, - value: ?*const Expr, -}; - -pub const ImportDecl = struct { - loc: Loc, - specifiers: []const ImportSpecifier, - source: []const u8, - attributes: []const ImportAttribute, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("import "); - if (self.specifiers.len > 0) { - for (self.specifiers, 0..) |spec, j| { - if (j > 0) f.write(", "); - spec.fmt(f); - } - f.write(" from "); - } - f.writeChar('"'); - f.write(self.source); - f.writeChar('"'); - for (self.attributes) |a| { - f.write(" /* "); - a.fmt(f); - f.write(" */"); - } - f.writeChar(';'); - } -}; - -pub const ImportSpecifier = union(enum) { - default: []const u8, - namespace: []const u8, - named: struct { imported: []const u8, local: []const u8 }, -}; - -pub const ImportAttribute = struct { - key: []const u8, - value: []const u8, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write(self.key); - f.write(": \""); - f.write(self.value); - f.writeChar('"'); - } -}; - -pub const ExportDecl = struct { - loc: Loc, - declaration: ?*const Decl, - specifiers: ?[]const ExportSpecifier, - source: ?[]const u8, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("export "); - if (self.declaration) |d| { - d.*.fmt(f); - } else if (self.specifiers) |s| { - f.writeChar('{'); - for (s, 0..) |sp, i| { - if (i > 0) f.write(", "); - sp.fmt(f); - } - f.writeChar('}'); - if (self.source) |src| { - f.write(" from \""); - f.write(src); - f.writeChar('"'); - } - f.writeChar(';'); - } else if (self.source) |src| { - f.write("* from \""); - f.write(src); - f.writeChar("\";"); - } - } -}; - -pub const ExportSpecifier = struct { - loc: Loc, - exported: []const u8, - local: []const u8, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write(self.local); - if (!std.mem.eql(u8, self.local, self.exported)) { - f.write(" as "); - f.write(self.exported); - } - } -}; - -pub const ExportDefault = struct { - loc: Loc, - declaration: *const Decl, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.write("export default "); - self.declaration.*.fmt(f); - } -}; - -pub const ArrayExpr = struct { - loc: Loc, - elems: []const ?Expr, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.writeChar('['); - for (self.elems, 0..) |elem, i| { - if (i > 0) f.write(", "); - if (elem) |e| e.fmt(f); - } - f.writeChar(']'); - } -}; - -pub const ObjectExpr = struct { - loc: Loc, - props: []const Prop, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.writeChar('{'); - for (self.props, 0..) |p, i| { - if (i > 0) f.write(", "); - p.fmt(f); - } - f.writeChar('}'); - } -}; - -pub const MemberExpr = struct { - loc: Loc, - obj: *const Expr, - prop: union(enum) { - ident: []const u8, - private: []const u8, - }, - - pub fn fmt(self: @This(), f: *Formatter) void { - self.obj.*.fmt(f); - switch (self.prop) { - .ident => |name| { - f.writeChar('.'); - f.write(name); - }, - .private => |name| { - f.writeChar('.'); - f.write(name); - }, - } - } -}; - -pub const ComputedMember = struct { - loc: Loc, - obj: *const Expr, - expr: *const Expr, - - pub fn fmt(self: @This(), f: *Formatter) void { - self.obj.*.fmt(f); - f.writeChar('['); - self.expr.*.fmt(f); - f.writeChar(']'); - } -}; - -pub const CallExpr = struct { - loc: Loc, - callee: *const Expr, - args: []const Expr, - optional: bool, - - pub fn fmt(self: @This(), f: *Formatter) void { - self.callee.*.fmt(f); - if (self.optional) { - f.write("?.("); - } else { - f.writeChar('('); - } - for (self.args, 0..) |a, i| { - if (i > 0) f.write(", "); - a.fmt(f); - } - f.writeChar(')'); - } -}; - -pub const NewExpr = struct { - loc: Loc, - callee: *const Expr, - args: []const Expr, -}; - -pub const ChainExpr = struct { - loc: Loc, - expr: *const Expr, -}; - -pub const UnaryOp = enum { - @"-", - @"+", - @"!", - @"~", - typeof, - void, - delete, -}; - -pub const UnaryExpr = struct { - loc: Loc, - op: UnaryOp, - arg: *const Expr, - prefix: bool, -}; - -pub const BinaryOp = enum { - @"==", - @"!=", - @"===", - @"!==", - @"<", - @"<=", - @">", - @">=", - @"<<", - @">>", - @">>>", - @"+", - @"-", - @"*", - @"/", - @"%", - @"**", - @"|", - @"^", - @"&", - in, - instanceof, - @"||", - @"&&", - @"??", -}; - -pub const BinaryExpr = struct { - loc: Loc, - op: BinaryOp, - left: *const Expr, - right: *const Expr, -}; - -pub const UpdateOp = enum { - @"++", - @"--", -}; - -pub const UpdateExpr = struct { - loc: Loc, - op: UpdateOp, - arg: *const Expr, - prefix: bool, -}; - -pub const IfExpr = struct { - loc: Loc, - condition: *const Expr, - consequent: *const Expr, - alternate: *const Expr, -}; - -pub const AssignOp = enum { - @"=", - @"+=", - @"-=", - @"*=", - @"/=", - @"%=", - @"**=", - @"<<=", - @">>=", - @">>>=", - @"|=", - @"^=", - @"&=", - @"||=", - @"&&=", - @"??=", -}; - -pub const AssignExpr = struct { - loc: Loc, - op: AssignOp, - left: *const Expr, - right: *const Expr, -}; - -pub const SeqExpr = struct { - loc: Loc, - exprs: []const Expr, -}; - -pub const YieldExpr = struct { - loc: Loc, - arg: ?*const Expr, - delegate: bool, -}; - -pub const AwaitExpr = struct { - loc: Loc, - arg: *const Expr, -}; - -pub const MetaProp = struct { - loc: Loc, - meta: []const u8, - prop: []const u8, -}; - -pub const TemplateLit = struct { - loc: Loc, - quasis: []const TemplateElem, - exprs: []const Expr, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.writeChar('`'); - var ei: usize = 0; - for (self.quasis, 0..) |q, i| { - if (i > 0 and ei < self.exprs.len) { - f.write("${"); - self.exprs[ei].fmt(f); - f.writeChar('}'); - ei += 1; - } - f.write(q.value); - } - f.writeChar('`'); - } -}; - -pub const TemplateElem = struct { - loc: Loc, - value: []const u8, - tail: bool, -}; - -pub const TaggedTemplate = struct { - loc: Loc, - tag: *const Expr, - quasi: TemplateLit, - - pub fn fmt(self: @This(), f: *Formatter) void { - self.tag.*.fmt(f); - self.quasi.fmt(f); - } -}; - -pub const Decorator = struct { - loc: Loc, - expr: *const Expr, - - pub fn fmt(self: @This(), f: *Formatter) void { - f.writeChar('@'); - self.expr.*.fmt(f); - } -}; -- cgit v1.2.3-70-g09d2