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This commit is contained in:
Cyrus Najmabadi
2014-12-17 12:36:53 -08:00
parent f459951431
commit 8048163714
1 changed files with 3 additions and 7 deletions
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10
src/compiler/utilities.ts
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@@ -62,22 +62,18 @@ module ts {
return node.end - node.pos;
}
function hasFlag(val: number, flag: number): boolean {
return (val & flag) !== 0;
}
// Returns true if this node contains a parse error anywhere underneath it.
export function containsParseError(node: Node): boolean {
aggregateChildData(node);
return hasFlag(node.parserContextFlags, ParserContextFlags.ThisNodeOrAnySubNodesHasError);
return (node.parserContextFlags & ParserContextFlags.ThisNodeOrAnySubNodesHasError) !== 0
}
function aggregateChildData(node: Node): void {
if (!hasFlag(node.parserContextFlags, ParserContextFlags.HasAggregatedChildData)) {
if (!(node.parserContextFlags & ParserContextFlags.HasAggregatedChildData)) {
// A node is considered to contain a parse error if:
// a) the parser explicitly marked that it had an error
// b) any of it's children reported that it had an error.
var thisNodeOrAnySubNodesHasError = hasFlag(node.parserContextFlags, ParserContextFlags.ThisNodeHasError) ||
var thisNodeOrAnySubNodesHasError = ((node.parserContextFlags & ParserContextFlags.ThisNodeHasError) !== 0) ||
forEachChild(node, containsParseError);
// If so, mark ourselves accordingly.