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Adds transformers for ignored catch parameter

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This commit is contained in:
Tingan Ho
2017-07-30 10:31:31 +02:00
parent b917eb0225
commit 148a494c90
2 changed files with 10 additions and 1 deletions
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2
src/compiler/transformers/es2015.ts
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@@ -3173,7 +3173,7 @@ namespace ts {
function visitCatchClause(node: CatchClause): CatchClause {
const ancestorFacts = enterSubtree(HierarchyFacts.BlockScopeExcludes, HierarchyFacts.BlockScopeIncludes);
let updated: CatchClause;
if (isBindingPattern(node.variableDeclaration.name)) {
if (node.variableDeclaration && isBindingPattern(node.variableDeclaration.name)) {
const temp = createTempVariable(/*recordTempVariable*/ undefined);
const newVariableDeclaration = createVariableDeclaration(temp);
setTextRange(newVariableDeclaration, node.variableDeclaration);

9
src/compiler/transformers/esnext.ts
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@@ -101,6 +101,8 @@ namespace ts {
return visitExpressionStatement(node as ExpressionStatement);
case SyntaxKind.ParenthesizedExpression:
return visitParenthesizedExpression(node as ParenthesizedExpression, noDestructuringValue);
case SyntaxKind.CatchClause:
return visitCatchClause(node as CatchClause);
default:
return visitEachChild(node, visitor, context);
}
@@ -212,6 +214,13 @@ namespace ts {
return visitEachChild(node, noDestructuringValue ? visitorNoDestructuringValue : visitor, context);
}
function visitCatchClause(node: CatchClause): CatchClause {
if (!node.variableDeclaration) {
return updateCatchClause(node, createVariableDeclaration("_ignoredCatchParameter"), node.block);
}
return visitEachChild(node, visitor, context);
}
/**
* Visits a BinaryExpression that contains a destructuring assignment.
*