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Improve assertion violation message (#22522)

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This commit is contained in:
Wesley Wigham
2018-03-22 11:46:52 -07:00
committed by Daniel Rosenwasser
parent a807336462
commit 459df020dc
1 changed files with 1 additions and 1 deletions
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src/compiler/binder.ts
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@@ -301,7 +301,7 @@ namespace ts {
case SyntaxKind.Parameter:
// Parameters with names are handled at the top of this function. Parameters
// without names can only come from JSDocFunctionTypes.
Debug.assert(node.parent.kind === SyntaxKind.JSDocFunctionType);
Debug.assert(node.parent.kind === SyntaxKind.JSDocFunctionType, "Impossible parameter parent kind", () => `parent is: ${(ts as any).SyntaxKind ? (ts as any).SyntaxKind[node.parent.kind] : node.parent.kind}, expected JSDocFunctionType`);
const functionType = <JSDocFunctionType>node.parent;
const index = functionType.parameters.indexOf(node as ParameterDeclaration);
return "arg" + index as __String;