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Add assertion whitespace lint rule (#9931)

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* Add assertion whitespace lint rule

* Fix typo

* Add the word `Rule` to Jakefile
This commit is contained in:
Wesley Wigham
2016-07-26 13:29:53 -07:00
committed by GitHub
parent 670f0c91b3
commit e12f2d8232
7 changed files with 45 additions and 35 deletions
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25
scripts/tslint/noTypeAssertionWhitespaceRule.ts Normal file
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@@ -0,0 +1,25 @@
import * as Lint from "tslint/lib/lint";
import * as ts from "typescript";
export class Rule extends Lint.Rules.AbstractRule {
public static TRAILING_FAILURE_STRING = "Excess trailing whitespace found around type assertion.";
public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
return this.applyWithWalker(new TypeAssertionWhitespaceWalker(sourceFile, this.getOptions()));
}
}
class TypeAssertionWhitespaceWalker extends Lint.RuleWalker {
public visitNode(node: ts.Node) {
if (node.kind === ts.SyntaxKind.TypeAssertionExpression) {
const refined = node as ts.TypeAssertion;
const leftSideWhitespaceStart = refined.type.getEnd() + 1;
const rightSideWhitespaceEnd = refined.expression.getStart();
if (leftSideWhitespaceStart !== rightSideWhitespaceEnd) {
this.addFailure(this.createFailure(leftSideWhitespaceStart, rightSideWhitespaceEnd, Rule.TRAILING_FAILURE_STRING));
}
}
super.visitNode(node);
}
}