Refactor to do more pre-calculation work.

src/optimizer.rs

@@ -5,7 +5,9 @@ use crate::ast::{
     ASTFlags, Expr, FlowControl, OpAssignment, Stmt, StmtBlock, StmtBlockContainer,
     SwitchCasesCollection,
 };
-use crate::engine::{KEYWORD_DEBUG, KEYWORD_EVAL, KEYWORD_FN_PTR, KEYWORD_PRINT, KEYWORD_TYPE_OF};
+use crate::engine::{
+    KEYWORD_DEBUG, KEYWORD_EVAL, KEYWORD_FN_PTR, KEYWORD_PRINT, KEYWORD_TYPE_OF, OP_NOT,
+};
 use crate::eval::{Caches, GlobalRuntimeState};
 use crate::func::builtin::get_builtin_binary_op_fn;
 use crate::func::hashing::get_hasher;
@@ -25,9 +27,6 @@ use std::{
     mem,
 };
 
-/// Standard not operator.
-const OP_NOT: &str = Token::Bang.literal_syntax();
-
 /// Level of optimization performed.
 #[derive(Debug, Eq, PartialEq, Hash, Clone, Copy)]
 #[non_exhaustive]