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andrewbranchandrewbranch
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Merge pull request microsoft#32117 from andrewbranch/bug/31460
Fix declaration emit for negative number properties, allow negative numbers as computed type property names
2 parents f6d7261 + 5ff3cda commit 23f1d5c

13 files changed

+204
-4
lines changed

‎src/compiler/binder.ts

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@@ -274,6 +274,9 @@ namespace ts {
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if (isStringOrNumericLiteralLike(nameExpression)) {
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return escapeLeadingUnderscores(nameExpression.text);
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}
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if (isSignedNumericLiteral(nameExpression)) {
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return tokenToString(nameExpression.operator) + nameExpression.operand.text as __String;
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}
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Debug.assert(isWellKnownSymbolSyntactically(nameExpression));
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return getPropertyNameForKnownSymbolName(idText((<PropertyAccessExpression>nameExpression).name));

‎src/compiler/checker.ts

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@@ -4652,6 +4652,9 @@ namespace ts {
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if (!isIdentifierText(name, compilerOptions.target) && !isNumericLiteralName(name)) {
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return `"${escapeString(name, CharacterCodes.doubleQuote)}"`;
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}
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if (isNumericLiteralName(name) && startsWith(name, "-")) {
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return `[${name}]`;
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}
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return name;
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}
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if (nameType.flags & TypeFlags.UniqueESSymbol) {

‎src/compiler/utilities.ts

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@@ -2705,11 +2705,19 @@ namespace ts {
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return isStringLiteralLike(node) || isNumericLiteral(node);
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}
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export function isSignedNumericLiteral(node: Node): node is PrefixUnaryExpression & { operand: NumericLiteral } {
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return isPrefixUnaryExpression(node) && (node.operator === SyntaxKind.PlusToken || node.operator === SyntaxKind.MinusToken) && isNumericLiteral(node.operand);
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}
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/**
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* A declaration has a dynamic name if both of the following are true:
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* 1. The declaration has a computed property name
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* 2. The computed name is *not* expressed as Symbol.<name>, where name
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* is a property of the Symbol constructor that denotes a built in
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* A declaration has a dynamic name if all of the following are true:
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* 1. The declaration has a computed property name.
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* 2. The computed name is *not* expressed as a StringLiteral.
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* 3. The computed name is *not* expressed as a NumericLiteral.
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* 4. The computed name is *not* expressed as a PlusToken or MinusToken
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* immediately followed by a NumericLiteral.
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* 5. The computed name is *not* expressed as `Symbol.<name>`, where `<name>`
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* is a property of the Symbol constructor that denotes a built-in
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* Symbol.
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*/
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export function hasDynamicName(declaration: Declaration): declaration is DynamicNamedDeclaration {
@@ -2720,6 +2728,7 @@ namespace ts {
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export function isDynamicName(name: DeclarationName): boolean {
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return name.kind === SyntaxKind.ComputedPropertyName &&
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!isStringOrNumericLiteralLike(name.expression) &&
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!isSignedNumericLiteral(name.expression) &&
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!isWellKnownSymbolSyntactically(name.expression);
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}
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‎tests/baselines/reference/computedPropertyNamesDeclarationEmit6_ES5.errors.txt

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@@ -0,0 +1,13 @@
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tests/cases/conformance/es6/computedProperties/computedPropertyNamesDeclarationEmit6_ES5.ts(5,3): error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
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==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesDeclarationEmit6_ES5.ts (1 errors) ====
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var v = {
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[-1]: {},
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[+1]: {},
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[~1]: {},
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[!1]: {}
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~~~~
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!!! error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
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}
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‎tests/baselines/reference/computedPropertyNamesDeclarationEmit6_ES5.js

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@@ -0,0 +1,25 @@
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//// [computedPropertyNamesDeclarationEmit6_ES5.ts]
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var v = {
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[-1]: {},
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[+1]: {},
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[~1]: {},
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[!1]: {}
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}
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//// [computedPropertyNamesDeclarationEmit6_ES5.js]
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var _a;
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var v = (_a = {},
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_a[-1] = {},
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_a[+1] = {},
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_a[~1] = {},
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_a[!1] = {},
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_a);
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//// [computedPropertyNamesDeclarationEmit6_ES5.d.ts]
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declare var v: {
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[x: number]: {};
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[-1]: {};
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1: {};
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};

‎tests/baselines/reference/computedPropertyNamesDeclarationEmit6_ES5.symbols

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=== tests/cases/conformance/es6/computedProperties/computedPropertyNamesDeclarationEmit6_ES5.ts ===
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var v = {
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>v : Symbol(v, Decl(computedPropertyNamesDeclarationEmit6_ES5.ts, 0, 3))
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[-1]: {},
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>[-1] : Symbol([-1], Decl(computedPropertyNamesDeclarationEmit6_ES5.ts, 0, 9))
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[+1]: {},
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>[+1] : Symbol([+1], Decl(computedPropertyNamesDeclarationEmit6_ES5.ts, 1, 11))
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[~1]: {},
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>[~1] : Symbol([~1], Decl(computedPropertyNamesDeclarationEmit6_ES5.ts, 2, 11))
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[!1]: {}
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>[!1] : Symbol([!1], Decl(computedPropertyNamesDeclarationEmit6_ES5.ts, 3, 11))
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}
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‎tests/baselines/reference/computedPropertyNamesDeclarationEmit6_ES5.types

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=== tests/cases/conformance/es6/computedProperties/computedPropertyNamesDeclarationEmit6_ES5.ts ===
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var v = {
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>v : { [x: number]: {}; [-1]: {}; 1: {}; }
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>{ [-1]: {}, [+1]: {}, [~1]: {}, [!1]: {}} : { [x: number]: {}; [-1]: {}; [+1]: {}; }
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[-1]: {},
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>[-1] : {}
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>-1 : -1
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>1 : 1
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>{} : {}
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[+1]: {},
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>[+1] : {}
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>+1 : 1
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>1 : 1
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>{} : {}
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[~1]: {},
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>[~1] : {}
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>~1 : number
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>1 : 1
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>{} : {}
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[!1]: {}
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>[!1] : {}
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>!1 : boolean
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>1 : 1
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>{} : {}
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}
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‎tests/baselines/reference/computedPropertyNamesDeclarationEmit6_ES6.errors.txt

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tests/cases/conformance/es6/computedProperties/computedPropertyNamesDeclarationEmit6_ES6.ts(5,3): error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
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==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesDeclarationEmit6_ES6.ts (1 errors) ====
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var v = {
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[-1]: {},
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[+1]: {},
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[~1]: {},
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[!1]: {}
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~~~~
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!!! error TS2464: A computed property name must be of type 'string', 'number', 'symbol', or 'any'.
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}
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‎tests/baselines/reference/computedPropertyNamesDeclarationEmit6_ES6.js

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//// [computedPropertyNamesDeclarationEmit6_ES6.ts]
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var v = {
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[-1]: {},
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[+1]: {},
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[~1]: {},
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[!1]: {}
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}
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//// [computedPropertyNamesDeclarationEmit6_ES6.js]
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var v = {
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[-1]: {},
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[+1]: {},
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[~1]: {},
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[!1]: {}
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};
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//// [computedPropertyNamesDeclarationEmit6_ES6.d.ts]
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declare var v: {
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[x: number]: {};
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[-1]: {};
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1: {};
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};

‎tests/baselines/reference/computedPropertyNamesDeclarationEmit6_ES6.symbols

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=== tests/cases/conformance/es6/computedProperties/computedPropertyNamesDeclarationEmit6_ES6.ts ===
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var v = {
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>v : Symbol(v, Decl(computedPropertyNamesDeclarationEmit6_ES6.ts, 0, 3))
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[-1]: {},
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>[-1] : Symbol([-1], Decl(computedPropertyNamesDeclarationEmit6_ES6.ts, 0, 9))
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[+1]: {},
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>[+1] : Symbol([+1], Decl(computedPropertyNamesDeclarationEmit6_ES6.ts, 1, 11))
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[~1]: {},
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>[~1] : Symbol([~1], Decl(computedPropertyNamesDeclarationEmit6_ES6.ts, 2, 11))
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[!1]: {}
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>[!1] : Symbol([!1], Decl(computedPropertyNamesDeclarationEmit6_ES6.ts, 3, 11))
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}
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