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const std = @import("std");
pub const Grammar = @import("grammar.zig");
pub const recognizer = @import("recognizer.zig");
fn help() !noreturn {
const stderr = std.io.getStdErr().writer();
try stderr.print("gll [grammar] [input]\n", .{});
std.process.exit(1);
}
fn read_whole_file(path: []const u8, allocator: std.mem.Allocator) ![]const u8 {
const file = try std.fs.cwd().openFile(path, .{});
defer file.close();
const stat = try file.stat();
return file.readToEndAlloc(allocator, stat.size);
}
pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
const allocator = gpa.allocator();
defer {
if (gpa.deinit() == .leak) {
@panic("memory leak detected");
}
}
var args = std.process.args();
_ = args.next();
const grammar_path = args.next() orelse try help();
const input_path = args.next() orelse try help();
const grammar_text = try read_whole_file(grammar_path, allocator);
defer allocator.free(grammar_text);
const input = try read_whole_file(input_path, allocator);
defer allocator.free(input);
var grammar = try Grammar.parse(grammar_text, allocator);
defer grammar.deinit(allocator);
}
test {
std.testing.refAllDecls(@This());
}
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