From 77cf9aa7535a1d9481f0bd3caeea26e2b85c5019 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Wed, 17 Jan 2024 22:30:02 +0100
Subject: migrate from f64 to own complex

---
 src/main.rs | 65 ++++++++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 45 insertions(+), 20 deletions(-)

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
index 313769f..d1e914d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,4 @@
+pub mod complex;
 pub mod context;
 pub mod expression;
 pub mod function;
@@ -6,51 +7,75 @@ pub mod string;
 
 use std::collections::HashMap;
 
+use complex::Complex;
+use context::Context;
 use expression::Expression;
 use function::Function;
 use operation::Operation;
 
-use crate::context::Context;
-
-fn add(a: f64, b: f64) -> f64 {
+fn add(a: Complex, b: Complex) -> Complex {
     a + b
 }
 
-fn mul(a: f64, b: f64) -> f64 {
+fn sub(a: Complex, b: Complex) -> Complex {
+    a - b
+}
+
+fn mul(a: Complex, b: Complex) -> Complex {
     a * b
 }
 
-fn div(a: f64, b: f64) -> f64 {
+fn div(a: Complex, b: Complex) -> Complex {
     a / b
 }
 
-fn pow(a: f64, b: f64) -> f64 {
-    a.powf(b)
+fn pow(a: Complex, b: Complex) -> Complex {
+    a.pow(b)
 }
 
-fn sqrt(a: f64) -> f64 {
+fn sqrt(a: Complex) -> Complex {
     a.sqrt()
 }
 
-impl<T> Function for T
-where
-    T: Fn(f64) -> f64,
-{
-    fn eval(&self, args: function::FunctionArgument) -> f64 {
-        self(args.get(0))
-    }
+fn sin(a: Complex) -> Complex {
+    a.sin()
+}
+
+fn cos(a: Complex) -> Complex {
+    a.cos()
+}
+
+fn tan(a: Complex) -> Complex {
+    a.tan()
 }
 
 fn main() {
-    let expr = "(2 + (3 + 10) * (3 + 10)) * 2";
+    let expr = "cos(3)";
 
-    let mut funcs : HashMap<String, Box<dyn Function>> = HashMap::new();
-    funcs.insert("sqrt".to_string(), Box::new(&sqrt));
     let ctx: Context = Context::new()
-        .with_operations(opvec![('+', &add), ('*', &mul), ('/', &div), ('^', &pow)])
-        .with_functions(funcs);
+        .with_operations(operations![{
+            '+' => &add,
+            '-' => &sub,
+            '*' => &mul,
+            '/' => &div,
+            '^' => &pow
+        }])
+        .with_functions(functions!({"sqrt" => &sqrt, "sin" => &sin, "cos" => &cos, "tan" => &tan}))
+        .with_variables(variables!({"x" => Complex::new(5.0, 0.0)}));
+
     let value = Expression::from_string(expr);
+    match value.evaluate(&ctx) {
+        Ok(res) => println!("{} = {}", expr, res),
+        Err(err) => println!("Error: {}", err),
+    }
+
+    let value = Expression::from_string("sin(3)");
+    match value.evaluate(&ctx) {
+        Ok(res) => println!("{} = {}", expr, res),
+        Err(err) => println!("Error: {}", err),
+    }
 
+    let value = Expression::from_string("tan(3)");
     match value.evaluate(&ctx) {
         Ok(res) => println!("{} = {}", expr, res),
         Err(err) => println!("Error: {}", err),
-- 
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