Started implementing an operation queue.

src/codegen/fasm.rs

@@ -1,16 +1,19 @@
+use std::rc::Rc;
 use crate::parse::ast::*;
 use skylang::temp;
 
 const REGISTERS: [&str; 9] = ["r10", "r11", "r12", "r13", "r14", "r15", "rax", "rdi", "rsi"];
 
 pub struct FasmCodegen {
-    register_counter: usize
+    register_counter: usize,
+    operation_queue: Vec<String>
 }
 
 impl FasmCodegen {
     pub fn new() -> Self {
 	FasmCodegen {
 	    register_counter: 0,
+	    operation_queue: Vec::new()
 	}
     }
 
@@ -54,6 +57,10 @@ impl FasmCodegen {
 	    match expr {
 		// If the expression is a math expression.
 		Expr::MathExpr(e) => {
+		    if let Expr::MathExpr(m) = e.right.as_ref() {
+			let codegen = fasm_codegen!(fun: &vec![Expr::MathExpr(m.clone())]);
+			self.operation_queue.push(codegen);
+		    }
 		    unwrap!(e.left);
 		    self.register_counter += 1;
 		    asm_start.push_str(format!("\tmov {}, rax\n", REGISTERS[self.register_counter]).as_str());