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Specialize computeData for arrays.

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Cyrus Najmabadi
2014-11-04 19:30:28 -08:00
parent 4cefe353f3
commit a9a2fe501a
1 changed files with 33 additions and 8 deletions
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41
src/services/syntax/syntaxElement.ts
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@@ -334,27 +334,52 @@ module TypeScript {
return info;
}
function computeData(element: ISyntaxElement): number {
var slotCount = childCount(element);
function combineData(fullWidth: number, isIncrementallyUnusable: boolean) {
return (fullWidth << SyntaxConstants.NodeFullWidthShift)
| (isIncrementallyUnusable ? SyntaxConstants.NodeIncrementallyUnusableMask : 0)
| SyntaxConstants.NodeDataComputed;
}
function listComputeData(list: ISyntaxNodeOrToken[]): number {
var fullWidth = 0;
var isIncrementallyUnusable = false;
for (var i = 0, n = list.length; i < n; i++) {
var child: ISyntaxElement = list[i];
fullWidth += TypeScript.fullWidth(child);
isIncrementallyUnusable = isIncrementallyUnusable || TypeScript.isIncrementallyUnusable(child);
}
return combineData(fullWidth, isIncrementallyUnusable);
}
function computeData(element: ISyntaxElement): number {
if (isList(element)) {
return listComputeData(<ISyntaxNodeOrToken[]>element);
}
else {
return nodeOrTokenComputeData(<ISyntaxNodeOrToken>element);
}
}
function nodeOrTokenComputeData(nodeOrToken: ISyntaxNodeOrToken) {
var fullWidth = 0;
var slotCount = nodeOrToken.childCount;
// If we have no children (like an OmmittedExpressionSyntax), we're automatically not reusable.
var isIncrementallyUnusable = slotCount === 0 && !isList(element);
var isIncrementallyUnusable = slotCount === 0;
for (var i = 0, n = slotCount; i < n; i++) {
var child = childAt(element, i);
var child = nodeOrToken.childAt(i);
if (child) {
fullWidth += TypeScript.fullWidth(child);
isIncrementallyUnusable = isIncrementallyUnusable || TypeScript.isIncrementallyUnusable(child);
}
}
return (fullWidth << SyntaxConstants.NodeFullWidthShift)
| (isIncrementallyUnusable ? SyntaxConstants.NodeIncrementallyUnusableMask : 0)
| SyntaxConstants.NodeDataComputed;
return combineData(fullWidth, isIncrementallyUnusable);
}
export function start(element: ISyntaxElement, text?: ISimpleText): number {