Remove createTypeDeclarationStatement hack

Author: Mohsen Azimi

src/helpers/index.ts

@@ -43,22 +43,6 @@ export function isReactComponent(classDeclaration: ts.ClassDeclaration, typeChec
     return true;
 }
 
-/**
- * A temporary hack until ts allows creating type alias declaration nodes
- * Creates a TypeAliasDeclaration
- * @param name Name of type node
- * @param type Type node
- * @param sourceFile SourceFile for context
- */
-export function createTypeDeclarationStatement(name: string, type: ts.TypeNode, sourceFile: ts.SourceFile) {
-    const printer = ts.createPrinter()
-    const typeString = printer.printNode(ts.EmitHint.Unspecified, type, sourceFile);
-    const newSource = ts.createSourceFile('temp.ts', `type ${name} = ${typeString}`, sourceFile.languageVersion);
-
-    return newSource.statements[0];
-}
-
-
 /**
  * Determine if a ts.HeritageClause is React HeritageClause
  *

src/transforms/collapse-intersection-interfaces-transform.ts

@@ -39,10 +39,12 @@ export function collapseIntersectionInterfacesTransformFactoryFactory(
                         .map((type: ts.TypeLiteralNode) => type.members)
                         .reduce((all, members) => ts.createNodeArray(all.concat(members)), ts.createNodeArray([]));
 
-                    return helpers.createTypeDeclarationStatement(
+                    return ts.createTypeAliasDeclaration(
+                        [],
+                        [],
                         node.name.text,
+                        [],
                         ts.createTypeLiteralNode(allMembers),
-                        sourceFile,
                     );
                 }
 

src/transforms/react-hoist-generics-transform.ts

@@ -56,8 +56,8 @@ function hoist(reactClass: ts.ClassDeclaration, sourceFile: ts.SourceFile) {
     const [propType, stateType] = reactType.typeArguments;
     const propTypeName = `I${className}Props`;
     const stateTypeName = `I${className}State`;
-    const propTypeDeclaration = helpers.createTypeDeclarationStatement(propTypeName, propType, sourceFile);
-    const stateTypeDeclaration = helpers.createTypeDeclarationStatement(stateTypeName, stateType, sourceFile);
+    const propTypeDeclaration = ts.createTypeAliasDeclaration([], [], propTypeName, [], propType);
+    const stateTypeDeclaration = ts.createTypeAliasDeclaration([], [], stateTypeName, [], stateType);
     const propTypeRef = ts.createTypeReferenceNode(propTypeName, []);
     const stateTypeRef = ts.createTypeReferenceNode(stateTypeName, []);
     const newClassStatement = insertTypeRefs(reactClass, propTypeRef, stateTypeRef);