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This commit is contained in:
Anders Hejlsberg 2015-01-09 06:52:24 -08:00
parent bdfb655d66
commit a8cf58939b
1 changed files with 9 additions and 2 deletions
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11
src/compiler/parser.ts
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@ -13,11 +13,15 @@ module ts {
}
function visitNode<T>(cbNode: (node: Node) => T, node: Node): T {
return node ? cbNode(node) : void 0;
if (node) {
return cbNode(node);
}
}
function visitNodeArray<T>(cbNodes: (nodes: Node[]) => T, nodes: Node[]) {
return nodes ? cbNodes(nodes) : void 0;
if (nodes) {
return cbNodes(nodes);
}
}
function visitEachNode<T>(cbNode: (node: Node) => T, nodes: Node[]) {
@ -39,6 +43,9 @@ module ts {
if (!node) {
return;
}
// The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
// callback parameters, but that causes a closure allocation for each invocation with noticeable effects
// on performance.
var visitNodes: (cb: (node: Node | Node[]) => T, nodes: Node[]) => T = cbNodeArray ? visitNodeArray : visitEachNode;
var cbNodes = cbNodeArray || cbNode;
switch (node.kind) {