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Fail fast on synthetic nodes in services (#19894)

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Wesley Wigham 2017-11-10 12:55:07 -08:00 committed by GitHub
parent 9d56f7b7c1
commit 06dd3f246f
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1 changed files with 18 additions and 0 deletions
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18
src/services/services.ts
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@ -62,39 +62,52 @@ namespace ts {
this.kind = kind;
}
private assertHasRealPosition(message?: string) {
// tslint:disable-next-line:debug-assert
Debug.assert(!positionIsSynthesized(this.pos) && !positionIsSynthesized(this.end), message || "Node must have a real position for this operation");
}
public getSourceFile(): SourceFile {
return getSourceFileOfNode(this);
}
public getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number {
this.assertHasRealPosition();
return getTokenPosOfNode(this, sourceFile, includeJsDocComment);
}
public getFullStart(): number {
this.assertHasRealPosition();
return this.pos;
}
public getEnd(): number {
this.assertHasRealPosition();
return this.end;
}
public getWidth(sourceFile?: SourceFile): number {
this.assertHasRealPosition();
return this.getEnd() - this.getStart(sourceFile);
}
public getFullWidth(): number {
this.assertHasRealPosition();
return this.end - this.pos;
}
public getLeadingTriviaWidth(sourceFile?: SourceFile): number {
this.assertHasRealPosition();
return this.getStart(sourceFile) - this.pos;
}
public getFullText(sourceFile?: SourceFile): string {
this.assertHasRealPosition();
return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
}
public getText(sourceFile?: SourceFile): string {
this.assertHasRealPosition();
if (!sourceFile) {
sourceFile = this.getSourceFile();
}
@ -183,21 +196,25 @@ namespace ts {
}
public getChildCount(sourceFile?: SourceFile): number {
this.assertHasRealPosition();
if (!this._children) this.createChildren(sourceFile);
return this._children.length;
}
public getChildAt(index: number, sourceFile?: SourceFile): Node {
this.assertHasRealPosition();
if (!this._children) this.createChildren(sourceFile);
return this._children[index];
}
public getChildren(sourceFile?: SourceFileLike): Node[] {
this.assertHasRealPosition("Node without a real position cannot be scanned and thus has no token nodes - use forEachChild and collect the result if that's fine");
if (!this._children) this.createChildren(sourceFile);
return this._children;
}
public getFirstToken(sourceFile?: SourceFile): Node {
this.assertHasRealPosition();
const children = this.getChildren(sourceFile);
if (!children.length) {
return undefined;
@ -210,6 +227,7 @@ namespace ts {
}
public getLastToken(sourceFile?: SourceFile): Node {
this.assertHasRealPosition();
const children = this.getChildren(sourceFile);
const child = lastOrUndefined(children);