add support for const type parameter (JS changes)

panagosg7 · facebook-github-bot · commit d9b1826b47b1 · 2024-12-17T18:05:37.000-08:00
Summary: JS changes for support for [`const` modifier on type parameters](microsoft/TypeScript#51865). E.g. ``` function foo<const T>(x: T): [T] {...} ``` Reviewed By: SamChou19815 Differential Revision: D66856337 fbshipit-source-id: 109911abd8400b97a35d20d611b376dd12c46bed
diff --git a/tools/hermes-parser/js/flow-api-translator/src/TSDefToFlowDef.js b/tools/hermes-parser/js/flow-api-translator/src/TSDefToFlowDef.js
@@ -1884,6 +1884,7 @@ const getTransforms = (originalCode: string, opts: TranslationOptions) => {
                 type: 'TypeAnnotation',
                 typeAnnotation: Transform.TSTypeAnnotation(node.constraint),
               }),
+        const: false,
         default:
           node.default == null
             ? null
diff --git a/tools/hermes-parser/js/hermes-estree/src/types.js b/tools/hermes-parser/js/hermes-estree/src/types.js
@@ -1606,6 +1606,7 @@ export interface TypeParameterDeclaration extends BaseNode {
 export interface TypeParameter extends BaseNode {
   +type: 'TypeParameter';
   +name: string;
+  +const: boolean;
   +bound: null | TypeAnnotation;
   +variance: null | Variance;
   +default: null | TypeAnnotationType;
diff --git a/tools/hermes-parser/js/hermes-parser/__tests__/__snapshots__/ComponentDeclaration-test.js.snap b/tools/hermes-parser/js/hermes-parser/__tests__/__snapshots__/ComponentDeclaration-test.js.snap
@@ -4954,6 +4954,7 @@ exports[`ComponentDeclaration type parameters Babel 1`] = `
         "params": [
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "T1",
             "type": "TypeParameter",
@@ -4962,6 +4963,7 @@ exports[`ComponentDeclaration type parameters Babel 1`] = `
           },
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "T2",
             "type": "TypeParameter",
@@ -5040,6 +5042,7 @@ exports[`ComponentDeclaration type parameters ESTree 1`] = `
         "params": [
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "T1",
             "type": "TypeParameter",
@@ -5048,6 +5051,7 @@ exports[`ComponentDeclaration type parameters ESTree 1`] = `
           },
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "T2",
             "type": "TypeParameter",
diff --git a/tools/hermes-parser/js/hermes-parser/__tests__/__snapshots__/ConditionalTypeAnnotation-test.js.snap b/tools/hermes-parser/js/hermes-parser/__tests__/__snapshots__/ConditionalTypeAnnotation-test.js.snap
@@ -16,6 +16,7 @@ exports[`ConditionalTypeAnnotation Basic Babel 1`] = `
         "params": [
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "TKey",
             "type": "TypeParameter",
@@ -114,6 +115,7 @@ exports[`ConditionalTypeAnnotation Basic ESTree 1`] = `
         "params": [
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "TKey",
             "type": "TypeParameter",
@@ -179,6 +181,7 @@ exports[`ConditionalTypeAnnotation InferType ESTree 1`] = `
                     "bound": {
                       "type": "NumberTypeAnnotation",
                     },
+                    "const": false,
                     "default": null,
                     "name": "T",
                     "type": "TypeParameter",
diff --git a/tools/hermes-parser/js/hermes-parser/__tests__/__snapshots__/HookDeclaration-test.js.snap b/tools/hermes-parser/js/hermes-parser/__tests__/__snapshots__/HookDeclaration-test.js.snap
@@ -884,6 +884,7 @@ exports[`HookDeclaration type parameters Babel 1`] = `
         "params": [
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "T1",
             "type": "TypeParameter",
@@ -892,6 +893,7 @@ exports[`HookDeclaration type parameters Babel 1`] = `
           },
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "T2",
             "type": "TypeParameter",
@@ -959,6 +961,7 @@ exports[`HookDeclaration type parameters ESTree 1`] = `
         "params": [
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "T1",
             "type": "TypeParameter",
@@ -967,6 +970,7 @@ exports[`HookDeclaration type parameters ESTree 1`] = `
           },
           {
             "bound": null,
+            "const": false,
             "default": null,
             "name": "T2",
             "type": "TypeParameter",
diff --git a/tools/hermes-parser/js/hermes-parser/__tests__/__snapshots__/MappedType-test.js.snap b/tools/hermes-parser/js/hermes-parser/__tests__/__snapshots__/MappedType-test.js.snap
@@ -39,6 +39,7 @@ exports[`MappedType Basic ESTree 1`] = `
           {
             "keyTparam": {
               "bound": null,
+              "const": false,
               "default": null,
               "name": "key",
               "type": "TypeParameter",
@@ -135,6 +136,7 @@ exports[`MappedType Union ESTree 1`] = `
           {
             "keyTparam": {
               "bound": null,
+              "const": false,
               "default": null,
               "name": "key",
               "type": "TypeParameter",
diff --git a/tools/hermes-parser/js/hermes-parser/src/HermesParserNodeDeserializers.js b/tools/hermes-parser/js/hermes-parser/src/HermesParserNodeDeserializers.js
@@ -1574,6 +1574,7 @@ function deserializeTypeParameter() {
     type: 'TypeParameter',
     loc: this.addEmptyLoc(),
     name: this.deserializeString(),
+    const: this.deserializeBoolean(),
     bound: this.deserializeNode(),
     variance: this.deserializeNode(),
     default: this.deserializeNode(),
diff --git a/tools/hermes-parser/js/hermes-transform/src/generated/node-types.js b/tools/hermes-parser/js/hermes-transform/src/generated/node-types.js
@@ -1192,6 +1192,7 @@ export type TypeOperatorProps = {
 
 export type TypeParameterProps = {
   +name: TypeParameterType['name'],
+  +const: TypeParameterType['const'],
   +bound?: ?MaybeDetachedNode<TypeParameterType['bound']>,
   +variance?: ?MaybeDetachedNode<TypeParameterType['variance']>,
   +default?: ?MaybeDetachedNode<TypeParameterType['default']>,
@@ -3685,6 +3686,7 @@ export function TypeParameter(props: {
   const node = detachedProps<TypeParameterType>((props.parent: $FlowFixMe), {
     type: 'TypeParameter',
     name: props.name,
+    const: props.const,
     bound: asDetachedNodeForCodeGen(props.bound),
     variance: asDetachedNodeForCodeGen(props.variance),
     default: asDetachedNodeForCodeGen(props.default),
