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emit prologue directives as first lines in file

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This commit is contained in:
Vladimir Matveev
2014-07-17 17:43:48 -07:00
parent b9372a1aa2
commit 4068404cd4
3 changed files with 31 additions and 10 deletions
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37
src/compiler/emitter.ts
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@@ -552,7 +552,11 @@ module ts {
}
function emitLines(nodes: Node[]) {
for (var i = 0; i < nodes.length; i++) {
emitLinesStartingAt(nodes, /*startIndex*/ 0);
}
function emitLinesStartingAt(nodes: Node[], startIndex: number): void {
for (var i = startIndex; i < nodes.length; i++) {
writeLine();
emit(nodes[i]);
}
@@ -1594,7 +1598,7 @@ module ts {
});
}
function emitAMDModule(node: SourceFile) {
function emitAMDModule(node: SourceFile, startIndex: number) {
var imports = getExternalImportDeclarations(node);
writeLine();
write("define([\"require\", \"exports\"");
@@ -1615,7 +1619,7 @@ module ts {
write(") {");
increaseIndent();
emitCaptureThisForNodeIfNecessary(node);
emitLines(node.statements);
emitLinesStartingAt(node.statements, startIndex);
var exportName = resolver.getExportAssignmentName(node);
if (exportName) {
writeLine();
@@ -1633,9 +1637,9 @@ module ts {
write("});");
}
function emitCommonJSModule(node: SourceFile) {
function emitCommonJSModule(node: SourceFile, startIndex: number) {
emitCaptureThisForNodeIfNecessary(node);
emitLines(node.statements);
emitLinesStartingAt(node.statements, startIndex);
var exportName = resolver.getExportAssignmentName(node);
if (exportName) {
writeLine();
@@ -1650,8 +1654,25 @@ module ts {
}
}
function isDirectivePrologue(n: Statement): boolean {
return n.kind === SyntaxKind.ExpressionStatement && (<ExpressionStatement>n).expression.kind === SyntaxKind.StringLiteral;
}
function emitSourceFile(node: SourceFile) {
currentSourceFile = node;
var startIndex = 0;
for (; startIndex < node.statements.length; ++startIndex) {
// emit prologue directives prior to __extends
if (isDirectivePrologue(node.statements[startIndex])) {
if (startIndex > 0) {
writeLine();
}
emit(node.statements[startIndex]);
}
else {
break;
}
}
if (!extendsEmitted && resolver.getNodeCheckFlags(node) & NodeCheckFlags.EmitExtends) {
writeLine();
write("var __extends = this.__extends || function (d, b) {");
@@ -1671,15 +1692,15 @@ module ts {
}
if (node.flags & NodeFlags.ExternalModule) {
if (compilerOptions.module === ModuleKind.AMD) {
emitAMDModule(node);
emitAMDModule(node, startIndex);
}
else {
emitCommonJSModule(node);
emitCommonJSModule(node, startIndex);
}
}
else {
emitCaptureThisForNodeIfNecessary(node);
emitLines(node.statements);
emitLinesStartingAt(node.statements, startIndex);
}
}