36 lines
1.5 KiB
TypeScript
36 lines
1.5 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 FAILURE_STRING = "The '|' and '&' operators must be surrounded by single spaces";
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public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
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return this.applyWithFunction(sourceFile, walk);
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}
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}
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function walk(ctx: Lint.WalkContext<void>): void {
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const { sourceFile } = ctx;
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ts.forEachChild(sourceFile, recur);
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function recur(node: ts.Node): void {
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if (node.kind === ts.SyntaxKind.UnionType || node.kind === ts.SyntaxKind.IntersectionType) {
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check((node as ts.UnionOrIntersectionTypeNode).types);
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}
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ts.forEachChild(node, recur);
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}
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function check(types: ts.TypeNode[]): void {
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let expectedStart = types[0].end + 2; // space, | or &
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for (let i = 1; i < types.length; i++) {
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const currentType = types[i];
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if (expectedStart !== currentType.pos || currentType.getLeadingTriviaWidth() !== 1) {
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const previousTypeEndPos = sourceFile.getLineAndCharacterOfPosition(types[i - 1].end);
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const currentTypeStartPos = sourceFile.getLineAndCharacterOfPosition(currentType.pos);
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if (previousTypeEndPos.line === currentTypeStartPos.line) {
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ctx.addFailureAtNode(currentType, Rule.FAILURE_STRING);
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}
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}
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expectedStart = currentType.end + 2;
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}
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}
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}
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