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Avoid allocation during binary expression emit when unnecessary.

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This commit is contained in:
Cyrus Najmabadi 2015-02-25 13:39:57 -08:00
parent e9874a2a4f
commit 9c867e3280
1 changed files with 3 additions and 4 deletions
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7
src/compiler/emitter.ts
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@ -3109,13 +3109,12 @@ module ts {
//
// So we only indent if the right side of the binary expression starts further in on the line
// versus the left.
var operatorEnd = getLineAndCharacterOfPosition(currentSourceFile, node.operatorToken.end);
var rightStart = getLineAndCharacterOfPosition(currentSourceFile, skipTrivia(currentSourceFile.text, node.right.pos));
// Check if the right expression is on a different line versus the operator itself. If so,
// we'll emit newline.
var onDifferentLine = operatorEnd.line !== rightStart.line;
if (onDifferentLine) {
if (!nodeEndIsOnSameLineAsNodeStart(node.operatorToken, node.right)) {
var rightStart = getLineAndCharacterOfPosition(currentSourceFile, skipTrivia(currentSourceFile.text, node.right.pos));
// Also, if the right expression starts further in on the line than the left, then we'll indent.
var exprStart = getLineAndCharacterOfPosition(currentSourceFile, skipTrivia(currentSourceFile.text, node.pos));
var firstCharOfExpr = getFirstNonWhitespaceCharacterIndexOnLine(exprStart.line);