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Add rule to check spaces around intersection/union type operators

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Ryan Cavanaugh
2015-10-22 11:35:48 -07:00
parent 28c2887d50
commit 69236c9be8
6 changed files with 46 additions and 16 deletions
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28
scripts/tslint/typeOperatorSpacingRule.ts Normal file
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@@ -0,0 +1,28 @@
/// <reference path="../../node_modules/tslint/typings/typescriptServices.d.ts" />
/// <reference path="../../node_modules/tslint/lib/tslint.d.ts" />
export class Rule extends Lint.Rules.AbstractRule {
public static FAILURE_STRING = "Place spaces around the '|' and '&' type operators";;
public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
return this.applyWithWalker(new TypeOperatorSpacingWalker(sourceFile, this.getOptions()));
}
}
class TypeOperatorSpacingWalker extends Lint.RuleWalker {
public visitNode(node: ts.Node) {
if(node.kind === ts.SyntaxKind.UnionType || node.kind === ts.SyntaxKind.IntersectionType) {
let typeNode = <ts.UnionOrIntersectionTypeNode>node;
let expectedStart = typeNode.types[0].end + 2; // space, | or &
for (let i = 1; i < typeNode.types.length; i++) {
if(expectedStart !== typeNode.types[i].pos || typeNode.types[i].getLeadingTriviaWidth() !== 1) {
const failure = this.createFailure(typeNode.types[i].pos, typeNode.types[i].getWidth(), Rule.FAILURE_STRING);
this.addFailure(failure);
}
expectedStart = typeNode.types[i].end + 2;
}
}
super.visitNode(node);
}
}