fix: ts parsing error (#940)

Fixed https://github.com/web-infra-dev/oxc/issues/932

crates/oxc_ast/src/ast/ts.rs

@@ -726,7 +726,7 @@ pub struct TSMappedType<'a> {
     pub span: Span,
     pub type_parameter: Box<'a, TSTypeParameter<'a>>,
     pub name_type: Option<TSType<'a>>,
-    pub type_annotation: TSType<'a>,
+    pub type_annotation: Option<Box<'a, TSTypeAnnotation<'a>>>,
     pub optional: TSMappedTypeModifierOperator,
     pub readonly: TSMappedTypeModifierOperator,
 }

crates/oxc_ast/src/ast_builder.rs

@@ -1407,7 +1407,7 @@ impl<'a> AstBuilder<'a> {
         span: Span,
         type_parameter: Box<'a, TSTypeParameter<'a>>,
         name_type: Option<TSType<'a>>,
-        type_annotation: TSType<'a>,
+        type_annotation: Option<Box<'a, TSTypeAnnotation<'a>>>,
         optional: TSMappedTypeModifierOperator,
         readonly: TSMappedTypeModifierOperator,
     ) -> TSType<'a> {

crates/oxc_ast/src/visit.rs

@@ -1447,7 +1447,9 @@ pub trait Visit<'a>: Sized {
         if let Some(name) = &ty.name_type {
             self.visit_ts_type(name);
         }
-        self.visit_ts_type(&ty.type_annotation);
+        if let Some(type_annotation) = &ty.type_annotation {
+            self.visit_ts_type_annotation(type_annotation);
+        }
     }
 
     fn visit_ts_function_type(&mut self, ty: &'a TSFunctionType<'a>) {

crates/oxc_ast/src/visit_mut.rs

@@ -1107,7 +1107,9 @@ pub trait VisitMut<'a, 'b>: Sized {
         if let Some(name) = &mut ty.name_type {
             self.visit_ts_type(name);
         }
-        self.visit_ts_type(&mut ty.type_annotation);
+        if let Some(type_annotation) = &mut ty.type_annotation {
+            self.visit_ts_type_annotation(type_annotation);
+        }
     }
 
     fn visit_ts_function_type(&mut self, ty: &'b mut TSFunctionType<'a>) {

crates/oxc_parser/src/ts/types.rs

@@ -656,9 +656,7 @@ impl<'a> Parser<'a> {
             _ => TSMappedTypeModifierOperator::None,
         };
 
-        self.expect(Kind::Colon)?;
-        let type_annotation = self.parse_ts_type()?;
-
+        let type_annotation = self.parse_ts_type_annotation()?;
         self.bump(Kind::Semicolon);
         self.expect(Kind::RCurly)?;
 

tasks/coverage/parser_typescript.snap

@@ -1,7 +1,7 @@
 parser_typescript Summary:
 AST Parsed     : 5060/5063 (99.94%)
 Positive Passed: 5051/5063 (99.76%)
-Negative Passed: 996/4761 (20.92%)
+Negative Passed: 994/4761 (20.88%)
 Expect Syntax Error: "compiler/ClassDeclaration10.ts"
 Expect Syntax Error: "compiler/ClassDeclaration11.ts"
 Expect Syntax Error: "compiler/ClassDeclaration13.ts"
@@ -71,6 +71,7 @@ Expect Syntax Error: "compiler/anonymousClassExpression2.ts"
 Expect Syntax Error: "compiler/anyDeclare.ts"
 Expect Syntax Error: "compiler/anyIdenticalToItself.ts"
 Expect Syntax Error: "compiler/anyIndexedAccessArrayNoException.ts"
+Expect Syntax Error: "compiler/anyMappedTypesError.ts"
 Expect Syntax Error: "compiler/arguments.ts"
 Expect Syntax Error: "compiler/argumentsBindsToFunctionScopeArgumentList.ts"
 Expect Syntax Error: "compiler/argumentsObjectIterator01_ES5.ts"
@@ -1104,6 +1105,7 @@ Expect Syntax Error: "compiler/logicalNotExpression1.ts"
 Expect Syntax Error: "compiler/mappedTypeAsStringTemplate.ts"
 Expect Syntax Error: "compiler/mappedTypeGenericWithKnownKeys.ts"
 Expect Syntax Error: "compiler/mappedTypeIndexedAccess.ts"
+Expect Syntax Error: "compiler/mappedTypeNoTypeNoCrash.ts"
 Expect Syntax Error: "compiler/mappedTypeNotMistakenlyHomomorphic.ts"
 Expect Syntax Error: "compiler/mappedTypeRecursiveInference.ts"
 Expect Syntax Error: "compiler/mappedTypeUnionConstrainTupleTreatedAsArrayLike.ts"
@@ -4045,14 +4047,6 @@ Expect to Parse: "conformance/salsa/plainJSRedeclare3.ts"
    ╰────
   help: Try insert a semicolon here
 
-  × Expected `:` but found `}`
-   ╭─[compiler/anyMappedTypesError.ts:2:1]
- 2 │ 
- 3 │ type Foo = {[P in "bar"]};
-   ·                         ┬
-   ·                         ╰── `:` expected
-   ╰────
-
   × 'arguments' is not allowed in class field initializer
    ╭─[compiler/argumentsUsedInClassFieldInitializerOrStaticInitializationBlock.ts:2:1]
  2 │   return class T {
@@ -7290,14 +7284,6 @@ Expect to Parse: "conformance/salsa/plainJSRedeclare3.ts"
  10 │     a.length;
     ╰────
 
-  × Expected `)` but found `}`
-   ╭─[compiler/mappedTypeNoTypeNoCrash.ts:1:1]
- 1 │ // @declaration: true
- 2 │ type T0<T> = ({[K in keyof T]}) extends ({[key in K]: T[K]}) ? number : never;
-   ·                              ┬
-   ·                              ╰── `)` expected
-   ╰────
-
   × Identifier `baz` has already been declared
    ╭─[compiler/mismatchedClassConstructorVariable.ts:1:1]
  1 │ var baz: foo;