Don't emit semicolons in class bodies (#285)

Fixes #280.

It's unclear what the real problem is, but this broke the website build, and is
probably cleaner to remove anyway.

src/util/getClassInfo.ts

@@ -51,6 +51,7 @@ export default function getClassInfo(
     if (tokens.matchesContextual(ContextualKeyword._constructor)) {
       ({constructorInitializers, constructorInsertPos} = processConstructor(tokens));
     } else if (tokens.matches1(tt.semi)) {
+      fieldRanges.push({start: tokens.currentIndex(), end: tokens.currentIndex() + 1});
       tokens.nextToken();
     } else if (tokens.currentToken().isType) {
       tokens.nextToken();

test/flow-test.ts

@@ -54,8 +54,8 @@ describe("transform flow", () => {
     `,
       `"use strict";
       class C {
-        ;
-        ;
+        
+        
       }
     `,
     );

test/sucrase-test.ts

@@ -284,7 +284,7 @@ describe("sucrase", () => {
     `,
       `"use strict";
       class A {
-        ;
+        
       } A.x = 3;
     `,
       {transforms: ["jsx", "imports", "typescript"]},
@@ -300,7 +300,7 @@ describe("sucrase", () => {
     `,
       `"use strict"; var _class;
       const A = (_class = class {
-        ;
+        
       }, _class.x = 3, _class)
     `,
       {transforms: ["jsx", "imports", "typescript"]},
@@ -316,7 +316,7 @@ describe("sucrase", () => {
     `,
       `"use strict";${ESMODULE_PREFIX}
        class C {
-        ;
+        
       } C.x = 3; exports.default = C;
     `,
       {transforms: ["jsx", "imports", "typescript"]},
@@ -337,8 +337,8 @@ describe("sucrase", () => {
       var _A = require('A'); var _A2 = _interopRequireDefault(_A);
       var _B = require('B'); var _B2 = _interopRequireDefault(_B);
       class C {constructor() { this.a = _A2.default; }
-        ;
-        ;
+        
+        
       } C.b = _B2.default;
     `,
       {transforms: ["jsx", "imports", "typescript"]},
@@ -551,4 +551,20 @@ describe("sucrase", () => {
       {transforms: ["imports", "typescript"]},
     );
   });
+
+  it("removes semicolons from class bodies", () => {
+    assertResult(
+      `
+      class A {
+        ;
+      }
+    `,
+      `"use strict";
+      class A {
+        
+      }
+    `,
+      {transforms: ["imports", "typescript"]},
+    );
+  });
 });

test/types-test.ts

@@ -119,8 +119,8 @@ describe("type transforms", () => {
     `,
       `"use strict";
       class A {constructor() { this.x = 2;this.y = {}; }
-        ;
-        ;
+        
+        
       }
     `,
     );
@@ -135,7 +135,7 @@ describe("type transforms", () => {
     `,
       `"use strict";
       class A {
-        ;
+        
       }
     `,
     );

test/typescript-test.ts

@@ -53,7 +53,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A {
-        ;
+        
          c() {
           return "hi";
         }
@@ -74,7 +74,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A {
-        ;
+        
         constructor() {;this.x = 1;
           this.y = 2;
         }
@@ -95,7 +95,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A extends B {
-        ;
+        
         constructor(a) {
           super(a);this.x = 1;;
         }
@@ -113,7 +113,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A {constructor() { this.x = 1; }
-        ;
+        
       }
     `,
     );
@@ -128,7 +128,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A extends B {constructor(...args) { super(...args); this.x = 1; }
-        ;
+        
       }
     `,
     );
@@ -143,7 +143,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A extends B {constructor(...args2) { super(...args2); this.args = 1; }
-        ;
+        
       }
     `,
     );
@@ -307,8 +307,8 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A {constructor() { this.f = function() {}; }
-        ;
-        ;
+        
+        
       }
     `,
     );
@@ -362,9 +362,9 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A {constructor() { this[a + b] = 3;this[0] = 1;this["Hello, world"] = 2; }
-        ;
-        ;
-        ;
+        
+        
+        
       }
     `,
     );
@@ -698,7 +698,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A {
-        ;
+        
          constructor() {;this.x = 1;
         }
       }
@@ -834,7 +834,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A {
-        ;
+        
         getFoo() {
           return foo;
         }
@@ -968,7 +968,7 @@ describe("typescript transform", () => {
     `,
       `"use strict";
       class A {constructor() { this.n = 3; }
-        ;
+        
       }
     `,
     );
@@ -1006,7 +1006,7 @@ describe("typescript transform", () => {
           f() {
           }
           
-          ;
+          
       } exports.Foo = Foo;
     `,
     );