25 lines
1 KiB
TypeScript
25 lines
1 KiB
TypeScript
import * as Lint from "tslint/lib";
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import * as ts from "typescript";
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export class Rule extends Lint.Rules.AbstractRule {
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public static TRAILING_FAILURE_STRING = "Excess trailing whitespace found around type assertion.";
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public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
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return this.applyWithWalker(new TypeAssertionWhitespaceWalker(sourceFile, this.getOptions()));
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}
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}
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class TypeAssertionWhitespaceWalker extends Lint.RuleWalker {
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public visitNode(node: ts.Node) {
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if (node.kind === ts.SyntaxKind.TypeAssertionExpression) {
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const refined = node as ts.TypeAssertion;
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const leftSideWhitespaceStart = refined.type.getEnd() + 1;
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const rightSideWhitespaceEnd = refined.expression.getStart();
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if (leftSideWhitespaceStart !== rightSideWhitespaceEnd) {
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this.addFailure(this.createFailure(leftSideWhitespaceStart, rightSideWhitespaceEnd, Rule.TRAILING_FAILURE_STRING));
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}
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}
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super.visitNode(node);
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}
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}
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