Merge pull request #15528 from Microsoft/async-computed-method

Fix formatting for async computed method: Allow space between 'async' and '['

Author: Andy

src/services/formatting/rules.ts

@@ -283,7 +283,9 @@ namespace ts.formatting {
             this.NoSpaceAfterDot = new Rule(RuleDescriptor.create3(SyntaxKind.DotToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
 
             // No space before and after indexer
-            this.NoSpaceBeforeOpenBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.OpenBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceBeforeOpenBracket = new Rule(
+                RuleDescriptor.create2(Shared.TokenRange.AnyExcept(SyntaxKind.AsyncKeyword), SyntaxKind.OpenBracketToken),
+                RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
             this.NoSpaceAfterCloseBracket = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), RuleAction.Delete));
 
             // Place a space before open brace in a function declaration

src/services/formatting/rulesMap.ts

@@ -41,8 +41,7 @@ namespace ts.formatting {
         }
 
         private FillRule(rule: Rule, rulesBucketConstructionStateList: RulesBucketConstructionState[]): void {
-            const specificRule = rule.Descriptor.LeftTokenRange !== Shared.TokenRange.Any &&
-                               rule.Descriptor.RightTokenRange !== Shared.TokenRange.Any;
+            const specificRule = rule.Descriptor.LeftTokenRange.isSpecific() && rule.Descriptor.RightTokenRange.isSpecific();
 
             rule.Descriptor.LeftTokenRange.GetTokens().forEach((left) => {
                 rule.Descriptor.RightTokenRange.GetTokens().forEach((right) => {

src/services/formatting/tokenRange.ts

@@ -6,6 +6,7 @@ namespace ts.formatting {
         export interface ITokenAccess {
             GetTokens(): SyntaxKind[];
             Contains(token: SyntaxKind): boolean;
+            isSpecific(): boolean;
         }
 
         export class TokenRangeAccess implements ITokenAccess {
@@ -27,6 +28,8 @@ namespace ts.formatting {
             public Contains(token: SyntaxKind): boolean {
                 return this.tokens.indexOf(token) >= 0;
             }
+
+            public isSpecific() { return true; }
         }
 
         export class TokenValuesAccess implements ITokenAccess {
@@ -43,6 +46,8 @@ namespace ts.formatting {
             public Contains(token: SyntaxKind): boolean {
                 return this.tokens.indexOf(token) >= 0;
             }
+
+            public isSpecific() { return true; }
         }
 
         export class TokenSingleValueAccess implements ITokenAccess {
@@ -56,15 +61,18 @@ namespace ts.formatting {
             public Contains(tokenValue: SyntaxKind): boolean {
                 return tokenValue === this.token;
             }
+
+            public isSpecific() { return true; }
+        }
+
+        const allTokens: SyntaxKind[] = [];
+        for (let token = SyntaxKind.FirstToken; token <= SyntaxKind.LastToken; token++) {
+            allTokens.push(token);
         }
 
         export class TokenAllAccess implements ITokenAccess {
             public GetTokens(): SyntaxKind[] {
-                const result: SyntaxKind[] = [];
-                for (let token = SyntaxKind.FirstToken; token <= SyntaxKind.LastToken; token++) {
-                    result.push(token);
-                }
-                return result;
+                return allTokens;
             }
 
             public Contains(): boolean {
@@ -74,6 +82,22 @@ namespace ts.formatting {
             public toString(): string {
                 return "[allTokens]";
             }
+
+            public isSpecific() { return false; }
+        }
+
+        export class TokenAllExceptAccess implements ITokenAccess {
+            constructor(readonly except: SyntaxKind) {}
+
+            public GetTokens(): SyntaxKind[] {
+                return allTokens.filter(t => t !== this.except);
+            }
+
+            public Contains(token: SyntaxKind): boolean {
+                return token !== this.except;
+            }
+
+            public isSpecific() { return false; }
         }
 
         export class TokenRange {
@@ -92,8 +116,8 @@ namespace ts.formatting {
                 return new TokenRange(new TokenRangeAccess(f, to, except));
             }
 
-            static AllTokens(): TokenRange {
-                return new TokenRange(new TokenAllAccess());
+            static AnyExcept(token: SyntaxKind): TokenRange {
+                return new TokenRange(new TokenAllExceptAccess(token));
             }
 
             public GetTokens(): SyntaxKind[] {
@@ -108,8 +132,12 @@ namespace ts.formatting {
                 return this.tokenAccess.toString();
             }
 
-            static Any: TokenRange = TokenRange.AllTokens();
-            static AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([SyntaxKind.MultiLineCommentTrivia]));
+            public isSpecific() {
+                return this.tokenAccess.isSpecific();
+            }
+
+            static Any: TokenRange = new TokenRange(new TokenAllAccess());
+            static AnyIncludingMultilineComments = TokenRange.FromTokens([...allTokens, SyntaxKind.MultiLineCommentTrivia]);
             static Keywords = TokenRange.FromRange(SyntaxKind.FirstKeyword, SyntaxKind.LastKeyword);
             static BinaryOperators = TokenRange.FromRange(SyntaxKind.FirstBinaryOperator, SyntaxKind.LastBinaryOperator);
             static BinaryKeywordOperators = TokenRange.FromTokens([SyntaxKind.InKeyword, SyntaxKind.InstanceOfKeyword, SyntaxKind.OfKeyword, SyntaxKind.AsKeyword, SyntaxKind.IsKeyword]);

tests/cases/fourslash/formatAsyncComputedMethod.ts

@@ -0,0 +1,9 @@
+/// <reference path="fourslash.ts"/>
+
+////class C {
+////    /*method*/async [0]() { }
+////}
+
+format.document();
+goTo.marker("method");
+verify.currentLineContentIs("    async [0]() { }");