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Adjust notion of minArgumentCount to account for required parameters with default initializers

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This commit is contained in:
Jason Freeman
2015-07-24 13:59:20 -07:00
parent aac34519d4
commit a47e02aeac
3 changed files with 36 additions and 9 deletions
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23
src/compiler/checker.ts
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@@ -3517,7 +3517,19 @@ namespace ts {
}
function isOptionalParameter(node: ParameterDeclaration) {
return hasQuestionToken(node) || !!node.initializer;
if (hasQuestionToken(node)) {
return true;
}
if (node.initializer) {
let signatureDeclaration = <SignatureDeclaration>node.parent;
let signature = getSignatureFromDeclaration(signatureDeclaration);
let parameterIndex = signatureDeclaration.parameters.indexOf(node);
Debug.assert(parameterIndex >= 0);
return parameterIndex >= signature.minArgumentCount;
}
return false;
}
function getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature {
@@ -3535,11 +3547,16 @@ namespace ts {
if (param.type && param.type.kind === SyntaxKind.StringLiteral) {
hasStringLiterals = true;
}
if (minArgumentCount < 0) {
if (param.initializer || param.questionToken || param.dotDotDotToken) {
if (param.initializer || param.questionToken || param.dotDotDotToken) {
if (minArgumentCount < 0) {
minArgumentCount = i;
}
}
else {
// If we see any required parameters, it means the prior ones were not in fact optional.
minArgumentCount = -1;
}
}
if (minArgumentCount < 0) {

4
src/compiler/utilities.ts
View File

@@ -988,15 +988,13 @@ namespace ts {
if (node) {
switch (node.kind) {
case SyntaxKind.Parameter:
return (<ParameterDeclaration>node).questionToken !== undefined;
case SyntaxKind.MethodDeclaration:
case SyntaxKind.MethodSignature:
return (<MethodDeclaration>node).questionToken !== undefined;
case SyntaxKind.ShorthandPropertyAssignment:
case SyntaxKind.PropertyAssignment:
case SyntaxKind.PropertyDeclaration:
case SyntaxKind.PropertySignature:
return (<PropertyDeclaration>node).questionToken !== undefined;
return (<ParameterDeclaration | MethodDeclaration | PropertyDeclaration>node).questionToken !== undefined;
}
}