no space after new on constructor signatures

Author: saschanaz

src/services/formatting/rules.ts

@@ -84,6 +84,7 @@ namespace ts.formatting {
         public NoSpaceBeforeComma: Rule;
 
         public SpaceAfterCertainKeywords: Rule;
+        public NoSpaceAfterNewKeywordOnConstructorSignature: Rule;
         public SpaceAfterLetConstInVariableDeclaration: Rule;
         public NoSpaceBeforeOpenParenInFuncCall: Rule;
         public SpaceAfterFunctionInFuncDecl: Rule;
@@ -334,6 +335,7 @@ namespace ts.formatting {
             this.NoSpaceBeforeComma = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CommaToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
 
             this.SpaceAfterCertainKeywords = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.VarKeyword, SyntaxKind.ThrowKeyword, SyntaxKind.NewKeyword, SyntaxKind.DeleteKeyword, SyntaxKind.ReturnKeyword, SyntaxKind.TypeOfKeyword, SyntaxKind.AwaitKeyword]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.NoSpaceAfterNewKeywordOnConstructorSignature = new Rule(RuleDescriptor.create1(SyntaxKind.NewKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConstructorSignatureContext), RuleAction.Delete));
             this.SpaceAfterLetConstInVariableDeclaration = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.LetKeyword, SyntaxKind.ConstKeyword]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), RuleAction.Space));
             this.NoSpaceBeforeOpenParenInFuncCall = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), RuleAction.Delete));
             this.SpaceAfterFunctionInFuncDecl = new Rule(RuleDescriptor.create3(SyntaxKind.FunctionKeyword, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsFunctionDeclContext), RuleAction.Space));
@@ -530,7 +532,8 @@ namespace ts.formatting {
                 this.SpaceBeforeAt,
                 this.NoSpaceAfterAt,
                 this.SpaceAfterDecorator,
-                this.NoSpaceBeforeNonNullAssertionOperator
+                this.NoSpaceBeforeNonNullAssertionOperator,
+                this.NoSpaceAfterNewKeywordOnConstructorSignature
             ];
 
             // These rules are applied after high priority rules.
@@ -881,6 +884,10 @@ namespace ts.formatting {
             return context.contextNode.kind === SyntaxKind.TypeLiteral; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
         }
 
+        static IsConstructorSignatureContext(context: FormattingContext): boolean {
+            return context.contextNode.kind === SyntaxKind.ConstructSignature;
+        }
+
         static IsTypeArgumentOrParameterOrAssertion(token: TextRangeWithKind, parent: Node): boolean {
             if (token.kind !== SyntaxKind.LessThanToken && token.kind !== SyntaxKind.GreaterThanToken) {
                 return false;

tests/cases/fourslash/formattingOnConstructorSignature.ts

@@ -0,0 +1,9 @@
+/// <reference path='fourslash.ts' />
+
+/////*1*/interface Gourai { new   () {} }
+/////*2*/type Stylet = { new   () {} }
+format.document();
+goTo.marker("1");
+verify.currentLineContentIs("interface Gourai { new() {} }");
+goTo.marker("2");
+verify.currentLineContentIs("type Stylet = { new() {} }");