Fix declaration emit dropping readonly from as const object literal properties

[Copilot]

as const object literals were missing readonly on method shorthands and outer properties in declaration emit:

export const value = {
  method(): string { return "a"; },
  prop: { nested: 1 },
} as const;

// tsgo emitted (wrong):
//   method(): string;
//   prop: { readonly nested: 1; };

// expected:
//   readonly method: () => string;
//   readonly prop: { readonly nested: 1; };

Analysis

pseudotypenodebuilder.go determines const context via isConstContext(elements[0].Name). That function walks the parent chain but only propagates through PropertyAssignment/ShorthandPropertyAssignment — not MethodDeclaration. When the first element is a method, the traversal dead-ends and isConst is false, dropping readonly from all properties.

Fix

Pass elements[0].Name.Parent.Parent (the ObjectLiteralExpression) instead of the property name. The object literal's parent is directly the as const assertion, so isConstContext resolves correctly regardless of which property kind comes first.

[Copilot]

Pull request overview

Fixes a declaration emit regression in the Go port where as const object literals could lose readonly on all properties when the first property was a method shorthand, by ensuring const-context detection starts from the object literal node rather than the first property’s name.

Changes:

• Update pseudo type node building to compute isConst from the containing ObjectLiteralExpression (so method shorthands don’t break const-context propagation).
• Add a new compiler test + reference baselines covering as const with a method shorthand and nested object property.
• Update an existing reference baseline (declarationEmitConstObjectLiteralGenericMethod1) to reflect correct readonly + function-type property emission for const object literal methods.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
internal/checker/pseudotypenodebuilder.go	Fixes const-context detection for pseudo object literal emission by anchoring the check at the object literal node.
testdata/tests/cases/compiler/declarationEmitReadonlyAsConst.ts	Adds regression test reproducing the missing-readonly behavior with a leading method shorthand.
testdata/baselines/reference/compiler/declarationEmitReadonlyAsConst.types	Reference type baseline for the new test.
testdata/baselines/reference/compiler/declarationEmitReadonlyAsConst.symbols	Reference symbol baseline for the new test.
testdata/baselines/reference/compiler/declarationEmitReadonlyAsConst.js	Reference JS + .d.ts baseline verifying readonly properties and function-type method emission.
testdata/baselines/reference/compiler/declarationEmitConstObjectLiteralGenericMethod1.js	Updates .d.ts reference output to match corrected readonly/function-type emission for const object literal generic methods.