fix(coverage): apply always_strict to test262 and typescript per th…

…e specifcation (#5555)

This also removes the confusing `SourceType::always_strict` field.

I hacked it with `SourceType::always_strict`, but what we actually want is add `'use strict'`.

This is technically a breaking change but I don't expect anyone using this outside of oxc.

The snapshot has a large diff due to every single line shifting by 1 row :-/

crates/oxc_ast/src/generated/assert_layouts.rs

@@ -1400,7 +1400,7 @@ const _: () = {
     assert!(offset_of!(Span, start) == 0usize);
     assert!(offset_of!(Span, end) == 4usize);
 
-    assert!(size_of::<SourceType>() == 4usize);
+    assert!(size_of::<SourceType>() == 3usize);
     assert!(align_of::<SourceType>() == 1usize);
 
     assert!(size_of::<Language>() == 1usize);
@@ -2954,7 +2954,7 @@ const _: () = {
     assert!(offset_of!(Span, start) == 0usize);
     assert!(offset_of!(Span, end) == 4usize);
 
-    assert!(size_of::<SourceType>() == 4usize);
+    assert!(size_of::<SourceType>() == 3usize);
     assert!(align_of::<SourceType>() == 1usize);
 
     assert!(size_of::<Language>() == 1usize);

crates/oxc_span/src/source_type/mod.rs

@@ -66,7 +66,6 @@ impl SourceType {
             language: Language::JavaScript,
             module_kind: ModuleKind::Script,
             variant: LanguageVariant::Standard,
-            always_strict: false,
         }
     }
 
@@ -110,7 +109,6 @@ impl SourceType {
             language: Language::TypeScript,
             module_kind: ModuleKind::Module,
             variant: LanguageVariant::Standard,
-            always_strict: false,
         }
     }
 
@@ -150,7 +148,6 @@ impl SourceType {
             language: Language::TypeScriptDefinition,
             module_kind: ModuleKind::Module,
             variant: LanguageVariant::Standard,
-            always_strict: false,
         }
     }
 
@@ -185,12 +182,8 @@ impl SourceType {
         self.variant == LanguageVariant::Jsx
     }
 
-    pub fn always_strict(self) -> bool {
-        self.always_strict
-    }
-
     pub fn is_strict(self) -> bool {
-        self.is_module() || self.always_strict
+        self.is_module()
     }
 
     #[must_use]
@@ -235,12 +228,6 @@ impl SourceType {
         self
     }
 
-    #[must_use]
-    pub const fn with_always_strict(mut self, yes: bool) -> Self {
-        self.always_strict = yes;
-        self
-    }
-
     /// Converts a file [`Path`] to [`SourceType`].
     ///
     /// ## Examples
@@ -329,7 +316,7 @@ impl SourceType {
             _ => LanguageVariant::Standard,
         };
 
-        Ok(Self { language, module_kind, variant, always_strict: false })
+        Ok(Self { language, module_kind, variant })
     }
 }
 

crates/oxc_span/src/source_type/types.rs

@@ -3,7 +3,7 @@
 
 use oxc_ast_macros::ast;
 #[cfg(feature = "serialize")]
-use ::{serde::Serialize, tsify::Tsify};
+use {serde::Serialize, tsify::Tsify};
 
 /// Source Type for JavaScript vs TypeScript / Script vs Module / JSX
 #[ast]
@@ -19,11 +19,6 @@ pub struct SourceType {
 
     /// Support JSX for JavaScript and TypeScript? default without JSX
     pub(super) variant: LanguageVariant,
-
-    /// Mark strict mode as always strict
-    ///
-    /// See <https://github.com/tc39/test262/blob/main/INTERPRETING.md#strict-mode>
-    pub(super) always_strict: bool,
 }
 
 /// JavaScript or TypeScript