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Object literals computed property names allow literal-typed expressions

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This commit is contained in:
Nathan Shively-Sanders 2017-09-07 11:30:38 -07:00
parent c82881f36e
commit ac58751b62
1 changed files with 10 additions and 3 deletions
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13
src/compiler/checker.ts
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@ -13526,6 +13526,7 @@ namespace ts {
for (let i = 0; i < node.properties.length; i++) {
const memberDecl = node.properties[i];
let member = memberDecl.symbol;
let literalName: __String | undefined;
if (memberDecl.kind === SyntaxKind.PropertyAssignment ||
memberDecl.kind === SyntaxKind.ShorthandPropertyAssignment ||
isObjectLiteralMethod(memberDecl)) {
@ -13536,6 +13537,12 @@ namespace ts {
let type: Type;
if (memberDecl.kind === SyntaxKind.PropertyAssignment) {
if (memberDecl.name.kind === SyntaxKind.ComputedPropertyName) {
const t = checkComputedPropertyName(<ComputedPropertyName>memberDecl.name);
if (t.flags & TypeFlags.Literal) {
literalName = escapeLeadingUnderscores("" + (t as LiteralType).value);
}
}
type = checkPropertyAssignment(<PropertyAssignment>memberDecl, checkMode);
}
else if (memberDecl.kind === SyntaxKind.MethodDeclaration) {
@ -13552,7 +13559,7 @@ namespace ts {
}
typeFlags |= type.flags;
const prop = createSymbol(SymbolFlags.Property | member.flags, member.escapedName);
const prop = createSymbol(SymbolFlags.Property | member.flags, literalName || member.escapedName);
if (inDestructuringPattern) {
// If object literal is an assignment pattern and if the assignment pattern specifies a default value
// for the property, make the property optional.
@ -13562,7 +13569,7 @@ namespace ts {
if (isOptional) {
prop.flags |= SymbolFlags.Optional;
}
if (hasDynamicName(memberDecl)) {
if (!literalName && hasDynamicName(memberDecl)) {
patternWithComputedProperties = true;
}
}
@ -13620,7 +13627,7 @@ namespace ts {
checkNodeDeferred(memberDecl);
}
if (hasDynamicName(memberDecl)) {
if (!literalName && hasDynamicName(memberDecl)) {
if (isNumericName(memberDecl.name)) {
hasComputedNumberProperty = true;
}