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Anders Hejlsberg
2019-10-06 10:06:40 -07:00
parent 720964f729
commit 92212ae19e
1 changed files with 3 additions and 12 deletions
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15
src/compiler/checker.ts
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@@ -18802,18 +18802,9 @@ namespace ts {
function isFalseExpression(expr: Expression): boolean {
const node = skipParentheses(expr);
if (node.kind === SyntaxKind.FalseKeyword) {
return true;
}
if (node.kind === SyntaxKind.BinaryExpression) {
if ((<BinaryExpression>node).operatorToken.kind === SyntaxKind.AmpersandAmpersandToken) {
return isFalseExpression((<BinaryExpression>node).left) || isFalseExpression((<BinaryExpression>node).right);
}
if ((<BinaryExpression>node).operatorToken.kind === SyntaxKind.BarBarToken) {
return isFalseExpression((<BinaryExpression>node).left) && isFalseExpression((<BinaryExpression>node).right);
}
}
return false;
return node.kind === SyntaxKind.FalseKeyword || node.kind === SyntaxKind.BinaryExpression && (
(<BinaryExpression>node).operatorToken.kind === SyntaxKind.AmpersandAmpersandToken && (isFalseExpression((<BinaryExpression>node).left) || isFalseExpression((<BinaryExpression>node).right)) ||
(<BinaryExpression>node).operatorToken.kind === SyntaxKind.BarBarToken && isFalseExpression((<BinaryExpression>node).left) && isFalseExpression((<BinaryExpression>node).right));
}
function isReachableFlowNodeWorker(flow: FlowNode, noCacheCheck: boolean): boolean {