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Check that bindingElement is in parameter declaration and pass in correct symbol exclusion flag

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Yui T 2015-05-05 15:00:01 -07:00
parent 170403fc53
commit 0fa240d232
1 changed files with 9 additions and 0 deletions
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9
src/compiler/binder.ts
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@ -440,6 +440,15 @@ module ts {
else if (isBlockOrCatchScoped(<Declaration>node)) {
bindBlockScopedVariableDeclaration(<Declaration>node);
}
else if (isParameterDeclaration(<VariableLikeDeclaration>node)) {
// If node is a binding element in parameter declaration, we need to use ParameterExcludes.
// Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
// For example:
// function foo([a,a]) {} // Duplicate Identifier error
// function bar(a,a) {} // Duplicate Identifier error, binding parameter declaration in this case is handled in bindParameter
// // which correctly set excluded symbols
bindDeclaration(<Declaration>node, SymbolFlags.FunctionScopedVariable, SymbolFlags.ParameterExcludes, /*isBlockScopeContainer*/ false);
}
else {
bindDeclaration(<Declaration>node, SymbolFlags.FunctionScopedVariable, SymbolFlags.FunctionScopedVariableExcludes, /*isBlockScopeContainer*/ false);
}