Refactor OptimizationLevel.

src/api/compile.rs

@@ -1,7 +1,7 @@
 //! Module that defines the public compilation API of [`Engine`].
 
 use crate::parser::{ParseResult, ParseState};
-use crate::{Engine, Scope, AST};
+use crate::{Engine, OptimizationLevel, Scope, AST};
 #[cfg(feature = "no_std")]
 use std::prelude::v1::*;
 
@@ -196,12 +196,7 @@ impl Engine {
         scope: &Scope,
         scripts: impl AsRef<[S]>,
     ) -> ParseResult<AST> {
-        self.compile_with_scope_and_optimization_level(
-            scope,
-            scripts,
-            #[cfg(not(feature = "no_optimize"))]
-            self.optimization_level,
-        )
+        self.compile_with_scope_and_optimization_level(scope, scripts, self.optimization_level)
     }
     /// Join a list of strings and compile into an [`AST`] using own scope at a specific optimization level.
     ///
@@ -215,7 +210,7 @@ impl Engine {
         &self,
         scope: &Scope,
         scripts: impl AsRef<[S]>,
-        #[cfg(not(feature = "no_optimize"))] optimization_level: crate::OptimizationLevel,
+        optimization_level: OptimizationLevel,
     ) -> ParseResult<AST> {
         let (stream, tokenizer_control) = self.lex_raw(
             scripts.as_ref(),
@@ -226,7 +221,6 @@ impl Engine {
             &mut stream.peekable(),
             &mut state,
             scope,
-            #[cfg(not(feature = "no_optimize"))]
             optimization_level,
         )
     }
@@ -298,13 +292,7 @@ impl Engine {
 
         let mut peekable = stream.peekable();
         let mut state = ParseState::new(self, tokenizer_control);
-        self.parse_global_expr(
-            &mut peekable,
-            &mut state,
-            scope,
-            #[cfg(not(feature = "no_optimize"))]
-            self.optimization_level,
-        )
+        self.parse_global_expr(&mut peekable, &mut state, scope, self.optimization_level)
     }
     /// Parse a JSON string into an [object map][crate::Map].
     /// This is a light-weight alternative to using, say,
@@ -400,7 +388,9 @@ impl Engine {
                 &mut state,
                 &scope,
                 #[cfg(not(feature = "no_optimize"))]
-                crate::OptimizationLevel::None,
+                OptimizationLevel::None,
+                #[cfg(feature = "no_optimize")]
+                OptimizationLevel::default(),
             )?;
             if has_null {
                 scope.push_constant("null", ());

src/api/eval.rs

@@ -3,7 +3,9 @@
 use crate::eval::{EvalState, GlobalRuntimeState};
 use crate::parser::ParseState;
 use crate::types::dynamic::Variant;
-use crate::{Dynamic, Engine, Module, Position, RhaiResult, RhaiResultOf, Scope, AST, ERR};
+use crate::{
+    Dynamic, Engine, Module, OptimizationLevel, Position, RhaiResult, RhaiResultOf, Scope, AST, ERR,
+};
 use std::any::type_name;
 #[cfg(feature = "no_std")]
 use std::prelude::v1::*;
@@ -64,7 +66,6 @@ impl Engine {
         let ast = self.compile_with_scope_and_optimization_level(
             scope,
             &[script],
-            #[cfg(not(feature = "no_optimize"))]
             self.optimization_level,
         )?;
         self.eval_ast_with_scope(scope, &ast)
@@ -122,7 +123,9 @@ impl Engine {
             &mut state,
             scope,
             #[cfg(not(feature = "no_optimize"))]
-            crate::OptimizationLevel::None,
+            OptimizationLevel::None,
+            #[cfg(feature = "no_optimize")]
+            OptimizationLevel::default(),
         )?;
 
         self.eval_ast_with_scope(scope, &ast)

src/api/run.rs

@@ -30,7 +30,6 @@ impl Engine {
             &mut stream.peekable(),
             &mut state,
             scope,
-            #[cfg(not(feature = "no_optimize"))]
             self.optimization_level,
         )?;
 

src/bin/rhai-run.rs

@@ -1,8 +1,5 @@
 use rhai::{Engine, EvalAltResult, Position};
 
-#[cfg(not(feature = "no_optimize"))]
-use rhai::OptimizationLevel;
-
 use std::{env, fs::File, io::Read, path::Path, process::exit};
 
 fn eprint_error(input: &str, mut err: EvalAltResult) {
@@ -53,7 +50,7 @@ fn main() {
         let mut engine = Engine::new();
 
         #[cfg(not(feature = "no_optimize"))]
-        engine.set_optimization_level(OptimizationLevel::Full);
+        engine.set_optimization_level(rhai::OptimizationLevel::Full);
 
         let mut f = match File::open(&filename) {
             Err(err) => {

src/engine.rs

@@ -8,7 +8,8 @@ use crate::packages::{Package, StandardPackage};
 use crate::tokenizer::Token;
 use crate::types::dynamic::Union;
 use crate::{
-    Dynamic, Identifier, ImmutableString, Module, Position, RhaiResult, Shared, StaticVec,
+    Dynamic, Identifier, ImmutableString, Module, OptimizationLevel, Position, RhaiResult, Shared,
+    StaticVec,
 };
 #[cfg(feature = "no_std")]
 use std::prelude::v1::*;
@@ -131,8 +132,7 @@ pub struct Engine {
     pub(crate) progress: Option<Box<crate::func::native::OnProgressCallback>>,
 
     /// Optimize the [`AST`][crate::AST] after compilation.
-    #[cfg(not(feature = "no_optimize"))]
-    pub(crate) optimization_level: crate::OptimizationLevel,
+    pub(crate) optimization_level: OptimizationLevel,
 
     /// Language options.
     pub(crate) options: crate::api::options::LanguageOptions,
@@ -287,8 +287,7 @@ impl Engine {
             #[cfg(not(feature = "unchecked"))]
             progress: None,
 
-            #[cfg(not(feature = "no_optimize"))]
-            optimization_level: crate::OptimizationLevel::default(),
+            optimization_level: OptimizationLevel::default(),
 
             options: crate::api::options::LanguageOptions::new(),
 

src/eval/data_check.rs

@@ -10,7 +10,7 @@ use std::prelude::v1::*;
 impl Engine {
     /// Recursively calculate the sizes of a value.
     ///
-    /// Sizes returned are `(`[`Array`][crate::Array], [`Map`][crate::Map] and `String)`.
+    /// Sizes returned are `(` [`Array`][crate::Array], [`Map`][crate::Map] and [`String`] `)`.
     ///
     /// # Panics
     ///

src/func/call.rs

@@ -12,7 +12,8 @@ use crate::engine::{
 use crate::eval::{EvalState, GlobalRuntimeState};
 use crate::{
     calc_fn_hash, calc_fn_params_hash, combine_hashes, Dynamic, Engine, FnArgsVec, FnPtr,
-    Identifier, ImmutableString, Module, Position, RhaiResult, RhaiResultOf, Scope, ERR,
+    Identifier, ImmutableString, Module, OptimizationLevel, Position, RhaiResult, RhaiResultOf,
+    Scope, ERR,
 };
 #[cfg(feature = "no_std")]
 use std::prelude::v1::*;
@@ -1450,7 +1451,9 @@ impl Engine {
             &Scope::new(),
             &[script],
             #[cfg(not(feature = "no_optimize"))]
-            crate::OptimizationLevel::None,
+            OptimizationLevel::None,
+            #[cfg(feature = "no_optimize")]
+            OptimizationLevel::default(),
         )?;
 
         // If new functions are defined within the eval string, it is an error

src/lib.rs

@@ -233,6 +233,10 @@ pub mod serde;
 #[cfg(not(feature = "no_optimize"))]
 pub use optimizer::OptimizationLevel;
 
+/// Placeholder for the optimization level.
+#[cfg(feature = "no_optimize")]
+pub type OptimizationLevel = ();
+
 // Expose internal data structures.
 
 #[cfg(feature = "internals")]

src/parser.rs

@@ -16,7 +16,7 @@ use crate::types::dynamic::AccessMode;
 use crate::types::StringsInterner;
 use crate::{
     calc_fn_hash, Dynamic, Engine, ExclusiveRange, Identifier, ImmutableString, InclusiveRange,
-    LexError, ParseError, Position, Scope, Shared, StaticVec, AST, INT, PERR,
+    LexError, OptimizationLevel, ParseError, Position, Scope, Shared, StaticVec, AST, INT, PERR,
 };
 #[cfg(feature = "no_std")]
 use std::prelude::v1::*;
@@ -3387,9 +3387,10 @@ impl Engine {
         input: &mut TokenStream,
         state: &mut ParseState,
         scope: &Scope,
-        #[cfg(not(feature = "no_optimize"))] optimization_level: crate::OptimizationLevel,
+        optimization_level: OptimizationLevel,
     ) -> ParseResult<AST> {
         let _scope = scope;
+        let _optimization_level = optimization_level;
         let mut functions = BTreeMap::new();
 
         let settings = ParseSettings {
@@ -3517,9 +3518,11 @@ impl Engine {
         input: &mut TokenStream,
         state: &mut ParseState,
         scope: &Scope,
-        #[cfg(not(feature = "no_optimize"))] optimization_level: crate::OptimizationLevel,
+        optimization_level: OptimizationLevel,
     ) -> ParseResult<AST> {
         let _scope = scope;
+        let _optimization_level = optimization_level;
+
         let (statements, _lib) = self.parse_global_level(input, state)?;
 
         #[cfg(not(feature = "no_optimize"))]