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Adds a debug command to the scanner

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This commit is contained in:
Orta Therox 2019-08-08 12:56:16 -04:00
parent b239c2a90e
commit 71fa26aecb
1 changed files with 12 additions and 1 deletions
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13
src/compiler/scanner.ts
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@ -877,7 +877,7 @@ namespace ts {
setText(text, start, length);
return {
const scanner: Scanner = {
getStartPos: () => startPos,
getTextPos: () => pos,
getToken: () => token,
@ -912,6 +912,17 @@ namespace ts {
scanRange,
};
if (Debug.isDebugging) {
Object.defineProperty(scanner, "__debugShowCurrentPositionInText", {
get: () => {
const text = scanner.getText();
return text.slice(0, scanner.getStartPos()) + "║" + text.slice(scanner.getStartPos());
},
});
}
return scanner;
function error(message: DiagnosticMessage): void;
function error(message: DiagnosticMessage, errPos: number, length: number): void;
function error(message: DiagnosticMessage, errPos: number = pos, length?: number): void {