Fix #8834: exclude paramters and variables from flag checks
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@ -14527,6 +14527,12 @@ namespace ts {
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function areDeclarationFlagsIdentical(left: Declaration, right: Declaration) {
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function areDeclarationFlagsIdentical(left: Declaration, right: Declaration) {
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if ((left.kind === SyntaxKind.Parameter && right.kind === SyntaxKind.VariableDeclaration) ||
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(left.kind === SyntaxKind.VariableDeclaration && right.kind === SyntaxKind.Parameter)) {
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// Diffrences in optionality between paramters and variables are allowed.
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return true;
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}
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if (hasQuestionToken(left) !== hasQuestionToken(right)) {
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if (hasQuestionToken(left) !== hasQuestionToken(right)) {
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return false;
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return false;
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}
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}
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@ -0,0 +1,15 @@
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//// [optionalParamterAndVariableDeclaration.ts]
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class C {
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constructor(options?: number) {
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var options = (options || 0);
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}
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}
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//// [optionalParamterAndVariableDeclaration.js]
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var C = (function () {
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function C(options) {
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var options = (options || 0);
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}
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return C;
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}());
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@ -0,0 +1,13 @@
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=== tests/cases/compiler/optionalParamterAndVariableDeclaration.ts ===
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class C {
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>C : Symbol(C, Decl(optionalParamterAndVariableDeclaration.ts, 0, 0))
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constructor(options?: number) {
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>options : Symbol(options, Decl(optionalParamterAndVariableDeclaration.ts, 1, 16), Decl(optionalParamterAndVariableDeclaration.ts, 2, 11))
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var options = (options || 0);
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>options : Symbol(options, Decl(optionalParamterAndVariableDeclaration.ts, 1, 16), Decl(optionalParamterAndVariableDeclaration.ts, 2, 11))
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>options : Symbol(options, Decl(optionalParamterAndVariableDeclaration.ts, 1, 16), Decl(optionalParamterAndVariableDeclaration.ts, 2, 11))
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}
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}
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@ -0,0 +1,16 @@
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=== tests/cases/compiler/optionalParamterAndVariableDeclaration.ts ===
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class C {
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>C : C
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constructor(options?: number) {
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>options : number
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var options = (options || 0);
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>options : number
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>(options || 0) : number
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>options || 0 : number
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>options : number
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>0 : number
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}
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}
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@ -0,0 +1,13 @@
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tests/cases/compiler/optionalParamterAndVariableDeclaration2.ts(4,13): error TS2403: Subsequent variable declarations must have the same type. Variable 'options' must be of type 'number | undefined', but here has type 'number'.
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==== tests/cases/compiler/optionalParamterAndVariableDeclaration2.ts (1 errors) ====
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class C {
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constructor(options?: number) {
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var options = (options || 0);
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~~~~~~~
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!!! error TS2403: Subsequent variable declarations must have the same type. Variable 'options' must be of type 'number | undefined', but here has type 'number'.
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}
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}
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@ -0,0 +1,16 @@
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//// [optionalParamterAndVariableDeclaration2.ts]
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class C {
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constructor(options?: number) {
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var options = (options || 0);
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}
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}
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//// [optionalParamterAndVariableDeclaration2.js]
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var C = (function () {
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function C(options) {
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var options = (options || 0);
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}
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return C;
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}());
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@ -0,0 +1,5 @@
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class C {
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constructor(options?: number) {
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var options = (options || 0);
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}
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}
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@ -0,0 +1,7 @@
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// @strictNullChecks: true
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class C {
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constructor(options?: number) {
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var options = (options || 0);
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}
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}
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