New CI test.

.github/workflows/build.yml

@@ -32,6 +32,7 @@ jobs:
           - "--features no_module"
           - "--features no_closure"
           - "--features unicode-xid-ident"
+          - "--features sync,only_i32,no_function,no_float,no_optimize,no_module,no_closure,serde,unchecked"
         toolchain: [stable]
         experimental: [false]
         include:

src/optimize.rs

@@ -33,18 +33,19 @@ pub enum OptimizationLevel {
 
 impl OptimizationLevel {
     /// Is the `OptimizationLevel` [`None`][OptimizationLevel::None]?
+    #[allow(dead_code)]
     #[inline(always)]
     pub fn is_none(self) -> bool {
         self == Self::None
     }
     /// Is the `OptimizationLevel` [`Simple`][OptimizationLevel::Simple]?
-    #[cfg(not(feature = "no_optimize"))]
+    #[allow(dead_code)]
     #[inline(always)]
     pub fn is_simple(self) -> bool {
         self == Self::Simple
     }
     /// Is the `OptimizationLevel` [`Full`][OptimizationLevel::Full]?
-    #[cfg(not(feature = "no_optimize"))]
+    #[allow(dead_code)]
     #[inline(always)]
     pub fn is_full(self) -> bool {
         self == Self::Full