[Breaking change] Remove createFix, and just use the Replacement(s) as the fix.

src/language/rule/rule.ts

@@ -138,6 +138,10 @@ export class Replacement {
         return replacements.reduce((text, r) => r.apply(text), content);
     }
 
+    public static replaceNode(node: ts.Node, text: string): Replacement {
+        return this.replaceFromTo(node.getStart(), node.getEnd(), text);
+    }
+
     public static replaceFromTo(start: number, end: number, text: string) {
         return new Replacement(start, end - start, text);
     }
@@ -188,19 +192,10 @@ export class Fix {
         return Replacement.applyAll(content, replacements);
     }
 
-    constructor(private innerRuleName: string, private innerReplacements: Replacement[]) {
-    }
-
-    get ruleName() {
-        return this.innerRuleName;
-    }
-
-    get replacements() {
-        return this.innerReplacements;
-    }
+    constructor(readonly replacements: Replacement[]) {}
 
     public apply(content: string) {
-        return Replacement.applyAll(content, this.innerReplacements);
+        return Replacement.applyAll(content, this.replacements);
     }
 }
 
@@ -240,19 +235,21 @@ export class RuleFailure {
     private endPosition: RuleFailurePosition;
     private rawLines: string;
     private ruleSeverity: RuleSeverity;
+    private fix?: Fix;
 
     constructor(private sourceFile: ts.SourceFile,
                 start: number,
                 end: number,
                 private failure: string,
                 private ruleName: string,
-                private fix?: Fix) {
+                fix?: Replacement | Replacement[]) {
 
         this.fileName = sourceFile.fileName;
         this.startPosition = this.createFailurePosition(start);
         this.endPosition = this.createFailurePosition(end);
         this.rawLines = sourceFile.text;
         this.ruleSeverity = "error";
+        this.fix = fix ? new Fix(Array.isArray(fix) ? fix : [fix]) : undefined;
     }
 
     public getFileName() {

src/language/walker/ruleWalker.ts

@@ -17,7 +17,7 @@
 
 import * as ts from "typescript";
 
-import {Fix, IOptions, Replacement, RuleFailure} from "../rule/rule";
+import {IOptions, Replacement, RuleFailure} from "../rule/rule";
 import {SyntaxWalker} from "./syntaxWalker";
 import {IWalker} from "./walker";
 
@@ -65,7 +65,7 @@ export class RuleWalker extends SyntaxWalker implements IWalker {
     }
 
     /** @deprecated Prefer `addFailureAt` and its variants. */
-    public createFailure(start: number, width: number, failure: string, fix?: Fix): RuleFailure {
+    public createFailure(start: number, width: number, failure: string, fix?: Replacement | Replacement[]): RuleFailure {
         const from = (start > this.limit) ? this.limit : start;
         const to = ((start + width) > this.limit) ? this.limit : (start + width);
         return new RuleFailure(this.sourceFile, from, to, failure, this.ruleName, fix);
@@ -77,17 +77,17 @@ export class RuleWalker extends SyntaxWalker implements IWalker {
     }
 
     /** Add a failure with any arbitrary span. Prefer `addFailureAtNode` if possible. */
-    public addFailureAt(start: number, width: number, failure: string, fix?: Fix) {
+    public addFailureAt(start: number, width: number, failure: string, fix?: Replacement | Replacement[]) {
         this.addFailure(this.createFailure(start, width, failure, fix));
     }
 
     /** Like `addFailureAt` but uses start and end instead of start and width. */
-    public addFailureFromStartToEnd(start: number, end: number, failure: string, fix?: Fix) {
+    public addFailureFromStartToEnd(start: number, end: number, failure: string, fix?: Replacement | Replacement[]) {
         this.addFailureAt(start, end - start, failure, fix);
     }
 
     /** Add a failure using a node's span. */
-    public addFailureAtNode(node: ts.Node, failure: string, fix?: Fix) {
+    public addFailureAtNode(node: ts.Node, failure: string, fix?: Replacement | Replacement[]) {
         this.addFailureAt(node.getStart(this.sourceFile), node.getWidth(this.sourceFile), failure, fix);
     }
 
@@ -110,8 +110,4 @@ export class RuleWalker extends SyntaxWalker implements IWalker {
     public getRuleName(): string {
         return this.ruleName;
     }
-
-    public createFix(...replacements: Replacement[]): Fix {
-        return new Fix(this.ruleName, replacements);
-    }
 }

src/language/walker/walkContext.ts

@@ -17,31 +17,27 @@
 
 import * as ts from "typescript";
 
-import { Fix, Replacement, RuleFailure } from "../rule/rule";
+import { Replacement, RuleFailure } from "../rule/rule";
 
 export class WalkContext<T> {
     public readonly failures: RuleFailure[] = [];
 
     constructor(public readonly sourceFile: ts.SourceFile, public readonly ruleName: string, public readonly options: T) {}
 
     /** Add a failure with any arbitrary span. Prefer `addFailureAtNode` if possible. */
-    public addFailureAt(start: number, width: number, failure: string, fix?: Fix) {
+    public addFailureAt(start: number, width: number, failure: string, fix?: Replacement | Replacement[]) {
         this.addFailure(start, start + width, failure, fix);
     }
 
-    public addFailure(start: number, end: number, failure: string, fix?: Fix) {
+    public addFailure(start: number, end: number, failure: string, fix?: Replacement | Replacement[]) {
         const fileLength = this.sourceFile.end;
-        this.failures.push(
-            new RuleFailure(this.sourceFile, Math.min(start, fileLength), Math.min(end, fileLength), failure, this.ruleName, fix),
-        );
+        start = Math.min(start, fileLength);
+        end = Math.min(end, fileLength);
+        this.failures.push(new RuleFailure(this.sourceFile, start, end, failure, this.ruleName, fix));
     }
 
     /** Add a failure using a node's span. */
-    public addFailureAtNode(node: ts.Node, failure: string, fix?: Fix) {
+    public addFailureAtNode(node: ts.Node, failure: string, fix?: Replacement | Replacement[]) {
         this.addFailure(node.getStart(this.sourceFile), node.getEnd(), failure, fix);
     }
-
-    public createFix(...replacements: Replacement[]) {
-        return new Fix(this.ruleName, replacements);
-    }
 }

src/rules/alignRule.ts

@@ -108,13 +108,9 @@ class AlignWalker extends Lint.RuleWalker {
             const curPos = this.getLineAndCharacterOfPosition(node.getStart());
             if (curPos.line !== prevPos.line && curPos.character !== alignToColumn) {
                 const diff = alignToColumn - curPos.character;
-                let fix;
-                if (0 < diff) {
-                    fix = this.createFix(this.appendText(node.getStart(), " ".repeat(diff)));
-                } else {
-                    fix = this.createFix(this.deleteText(node.getStart() + diff, -diff));
-                }
-                this.addFailureAtNode(node, kind + Rule.FAILURE_STRING_SUFFIX, fix);
+                this.addFailureAtNode(node, kind + Rule.FAILURE_STRING_SUFFIX, 0 < diff
+                    ? this.appendText(node.getStart(), " ".repeat(diff))
+                    : this.deleteText(node.getStart() + diff, -diff));
             }
             prevPos = curPos;
         }

src/rules/arrayTypeRule.ts

@@ -65,12 +65,11 @@ class ArrayTypeWalker extends Lint.RuleWalker {
             // Add a space if the type is preceded by 'as' and the node has no leading whitespace
             const space = !parens && node.parent!.kind === ts.SyntaxKind.AsExpression &&
                 node.getStart() === node.getFullStart() ? " " : "";
-            const fix = this.createFix(
+            this.addFailureAtNode(node, failureString, [
                 this.createReplacement(typeName.getStart(), parens, space + "Array<"),
                 // Delete the square brackets and replace with an angle bracket
                 this.createReplacement(typeName.getEnd() - parens, node.getEnd() - typeName.getEnd() + parens, ">"),
-            );
-            this.addFailureAtNode(node, failureString, fix);
+            ]);
         }
 
         super.visitArrayType(node);
@@ -83,21 +82,19 @@ class ArrayTypeWalker extends Lint.RuleWalker {
             const typeArgs = node.typeArguments;
             if (!typeArgs || typeArgs.length === 0) {
                 // Create an 'any' array
-                const fix = this.createFix(this.createReplacement(node.getStart(), node.getWidth(), "any[]"));
-                this.addFailureAtNode(node, failureString, fix);
+                this.addFailureAtNode(node, failureString, this.createReplacement(node.getStart(), node.getWidth(), "any[]"));
             } else if (typeArgs && typeArgs.length === 1 && (!this.hasOption(OPTION_ARRAY_SIMPLE) || this.isSimpleType(typeArgs[0]))) {
                 const type = typeArgs[0];
                 const typeStart = type.getStart();
                 const typeEnd = type.getEnd();
                 const parens = type.kind === ts.SyntaxKind.UnionType ||
                     type.kind === ts.SyntaxKind.FunctionType || type.kind === ts.SyntaxKind.IntersectionType;
-                const fix = this.createFix(
+                this.addFailureAtNode(node, failureString, [
                     // Delete Array and the first angle bracket
                     this.createReplacement(node.getStart(), typeStart - node.getStart(), parens ? "(" : ""),
                     // Delete the last angle bracket and replace with square brackets
                     this.createReplacement(typeEnd, node.getEnd() - typeEnd, (parens ? ")" : "") + "[]"),
-                );
-                this.addFailureAtNode(node, failureString, fix);
+                ]);
             }
         }
 

src/rules/arrowParensRule.ts

@@ -65,17 +65,17 @@ function walk(ctx: Lint.WalkContext<Options>) {
                     const parameter = node.parameters[0];
                     const start = parameter.getStart(ctx.sourceFile);
                     const end = parameter.end;
-                    ctx.addFailure(start, end, Rule.FAILURE_STRING_MISSING, ctx.createFix(
+                    ctx.addFailure(start, end, Rule.FAILURE_STRING_MISSING, [
                         Lint.Replacement.appendText(start, "("),
                         Lint.Replacement.appendText(end, ")"),
-                    ));
+                    ]);
                 }
             } else if (ctx.options.banSingleArgParens) {
                 const closeParen = getChildOfKind(node, ts.SyntaxKind.CloseParenToken)!;
-                ctx.addFailureAtNode(node.parameters[0], Rule.FAILURE_STRING_EXISTS, ctx.createFix(
+                ctx.addFailureAtNode(node.parameters[0], Rule.FAILURE_STRING_EXISTS, [
                     Lint.Replacement.deleteText(openParen.end - 1, 1),
                     Lint.Replacement.deleteText(closeParen.end - 1, 1),
-                ));
+                ]);
             }
         }
         return ts.forEachChild(node, cb);

src/rules/arrowReturnShorthandRule.ts

@@ -67,7 +67,8 @@ class Walker extends Lint.RuleWalker {
         return getLine(node.getEnd()) > getLine(node.getStart());
     }
 
-    private createArrowFunctionFix(arrowFunction: ts.FunctionLikeDeclaration, body: ts.Block, expr: ts.Expression): Lint.Fix | undefined {
+    private createArrowFunctionFix(arrowFunction: ts.FunctionLikeDeclaration, body: ts.Block, expr: ts.Expression,
+        ): Lint.Replacement[] | undefined {
         const text = this.getSourceFile().text;
         const statement = expr.parent!;
         const returnKeyword = Lint.childOfKind(statement, ts.SyntaxKind.ReturnKeyword)!;
@@ -78,7 +79,7 @@ class Walker extends Lint.RuleWalker {
 
         const anyComments = hasComments(arrow) || hasComments(openBrace) || hasComments(statement) || hasComments(returnKeyword) ||
             hasComments(expr) || (semicolon && hasComments(semicolon)) || hasComments(closeBrace);
-        return anyComments ? undefined : this.createFix(
+        return anyComments ? undefined : [
             // Object literal must be wrapped in `()`
             ...(expr.kind === ts.SyntaxKind.ObjectLiteralExpression ? [
                 this.appendText(expr.getStart(), "("),
@@ -90,7 +91,7 @@ class Walker extends Lint.RuleWalker {
             this.deleteFromTo(statement.getStart(), expr.getStart()),
             // " }" (may include semicolon)
             this.deleteFromTo(expr.end, closeBrace.end),
-        );
+        ];
 
         function hasComments(node: ts.Node): boolean {
             return ts.getTrailingCommentRanges(text, node.getEnd()) !== undefined;

src/rules/noAngleBracketTypeAssertionRule.ts

@@ -47,13 +47,12 @@ export class Rule extends Lint.Rules.AbstractRule {
 class NoAngleBracketTypeAssertionWalker extends Lint.RuleWalker {
     public visitTypeAssertionExpression(node: ts.TypeAssertion) {
         const { expression, type } = node;
-        const fix = this.createFix(
+        this.addFailureAtNode(node, Rule.FAILURE_STRING, [
             // add 'as' syntax at end
             this.createReplacement(node.getEnd(), 0, ` as ${type.getText()}`),
             // delete the angle bracket assertion
             this.createReplacement(node.getStart(), expression.getStart() - node.getStart(), ""),
-        );
-        this.addFailureAtNode(node, Rule.FAILURE_STRING, fix);
+        ]);
         super.visitTypeAssertionExpression(node);
     }
 }

src/rules/noAnyRule.ts

@@ -39,16 +39,16 @@ export class Rule extends Lint.Rules.AbstractRule {
         "or suppress this occurrence.";
 
     public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
-        return this.applyWithWalker(new NoAnyWalker(sourceFile, this.getOptions()));
+        return this.applyWithFunction(sourceFile, walk);
     }
 }
 
-class NoAnyWalker extends Lint.RuleWalker {
-    public visitAnyKeyword(node: ts.Node) {
-        const fix = this.createFix(
-            this.createReplacement(node.getStart(), node.getWidth(), "{}"),
-        );
-        this.addFailureAtNode(node, Rule.FAILURE_STRING, fix);
-        super.visitAnyKeyword(node);
-    }
+function walk(ctx: Lint.WalkContext<void>): void {
+    ts.forEachChild(ctx.sourceFile, function cb(node: ts.Node): void {
+        if (node.kind === ts.SyntaxKind.AnyKeyword) {
+            ctx.addFailureAtNode(node, Rule.FAILURE_STRING, Lint.Replacement.replaceNode(node, "{}"));
+        } else {
+            return ts.forEachChild(node, cb);
+        }
+    });
 }

src/rules/noBooleanLiteralCompareRule.ts

@@ -74,7 +74,7 @@ class Walker extends Lint.ProgramAwareRuleWalker {
             }
         }
 
-        this.addFailureAtNode(expression, Rule.FAILURE_STRING(negate), this.createFix(...replacements));
+        this.addFailureAtNode(expression, Rule.FAILURE_STRING(negate), replacements);
     }
 }
 

src/rules/noConsecutiveBlankLinesRule.ts

@@ -92,14 +92,12 @@ function walk(ctx: Lint.WalkContext<number>) {
     const templateRanges = getTemplateRanges(ctx.sourceFile);
     for (const possibleFailure of possibleFailures) {
         if (!templateRanges.some((template) => template.pos < possibleFailure.pos && possibleFailure.pos < template.end)) {
-            ctx.addFailureAt(possibleFailure.pos, 1, failureString, ctx.createFix(
-                Lint.Replacement.deleteFromTo(
-                    // special handling for fixing blank lines at the end of the file
-                    // to fix this we need to cut off the line break of the last allowed blank line, too
-                    possibleFailure.end === sourceText.length ? getStartOfLineBreak(sourceText, possibleFailure.pos) : possibleFailure.pos,
-                    possibleFailure.end,
-                ),
-            ));
+            // special handling for fixing blank lines at the end of the file
+            // to fix this we need to cut off the line break of the last allowed blank line, too
+            const start = possibleFailure.end === sourceText.length
+                ? getStartOfLineBreak(sourceText, possibleFailure.pos)
+                : possibleFailure.pos;
+            ctx.addFailureAt(possibleFailure.pos, 1, failureString, Lint.Replacement.deleteFromTo(start, possibleFailure.end));
         }
     }
 }

src/rules/noInferrableTypesRule.ts

@@ -98,23 +98,23 @@ class NoInferrableTypesWalker extends Lint.AbstractWalker<IOptions> {
         return ts.forEachChild(sourceFile, cb);
     }
 
-    private checkDeclaration(node: ts.VariableLikeDeclaration) {
-        if (node.type != null && node.initializer != null) {
-            let failure: string | null = null;
+    private checkDeclaration({ name, type, initializer }: ts.VariableLikeDeclaration) {
+        if (type != null && initializer != null) {
+            let failure: string | undefined;
 
-            switch (node.type.kind) {
+            switch (type.kind) {
                 case ts.SyntaxKind.BooleanKeyword:
-                    if (node.initializer.kind === ts.SyntaxKind.TrueKeyword || node.initializer.kind === ts.SyntaxKind.FalseKeyword) {
+                    if (initializer.kind === ts.SyntaxKind.TrueKeyword || initializer.kind === ts.SyntaxKind.FalseKeyword) {
                         failure = "boolean";
                     }
                     break;
                 case ts.SyntaxKind.NumberKeyword:
-                    if (node.initializer.kind === ts.SyntaxKind.NumericLiteral) {
+                    if (initializer.kind === ts.SyntaxKind.NumericLiteral) {
                         failure = "number";
                     }
                     break;
                 case ts.SyntaxKind.StringKeyword:
-                    switch (node.initializer.kind) {
+                    switch (initializer.kind) {
                         case ts.SyntaxKind.StringLiteral:
                         case ts.SyntaxKind.NoSubstitutionTemplateLiteral:
                         case ts.SyntaxKind.TemplateExpression:
@@ -128,11 +128,8 @@ class NoInferrableTypesWalker extends Lint.AbstractWalker<IOptions> {
                     break;
             }
 
-            if (failure != null) {
-                this.addFailureAtNode(node.type,
-                                      Rule.FAILURE_STRING_FACTORY(failure),
-                                      this.createFix(Lint.Replacement.deleteFromTo(node.name.end, node.type.end)),
-                );
+            if (failure !== undefined) {
+                this.addFailureAtNode(type, Rule.FAILURE_STRING_FACTORY(failure), Lint.Replacement.deleteFromTo(name.end, type.end));
             }
         }
     }

src/rules/noStringThrowRule.ts

@@ -45,11 +45,8 @@ class Walker extends Lint.RuleWalker {
     public visitThrowStatement(node: ts.ThrowStatement) {
         const {expression} = node;
         if (this.stringConcatRecursive(expression)) {
-            const fix = this.createFix(this.createReplacement(expression.getStart(),
-                                                              expression.getEnd() - expression.getStart(),
-                                                              `new Error(${expression.getText()})`));
-            this.addFailure(this.createFailure(
-                    node.getStart(), node.getWidth(), Rule.FAILURE_STRING, fix));
+            this.addFailureAtNode(node, Rule.FAILURE_STRING,
+                Lint.Replacement.replaceNode(expression, `new Error(${expression.getText()})`));
         }
 
         super.visitThrowStatement(node);

src/rules/noTrailingWhitespaceRule.ts

@@ -120,5 +120,5 @@ function walk(ctx: Lint.WalkContext<IgnoreOption>) {
 }
 
 function reportFailure(ctx: Lint.WalkContext<IgnoreOption>, start: number, end: number) {
-    ctx.addFailure(start, end, Rule.FAILURE_STRING, ctx.createFix(Lint.Replacement.deleteFromTo(start, end)));
+    ctx.addFailure(start, end, Rule.FAILURE_STRING, Lint.Replacement.deleteFromTo(start, end));
 }