From 2c1d6dcf080eff59debc30de9b5a66a89f8225bd Mon Sep 17 00:00:00 2001
From: Derek Xu <xuderekq@hotmail.com>
Date: Wed, 9 Oct 2019 12:53:26 -0700
Subject: [PATCH] Fixed handling of true and false literal types (#3)

---
 lib/facade_converter.ts | 13 ++++++++++---
 test/type_test.ts       |  6 ++++++
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/lib/facade_converter.ts b/lib/facade_converter.ts
index c33179f..0c9b942 100644
--- a/lib/facade_converter.ts
+++ b/lib/facade_converter.ts
@@ -474,10 +474,17 @@ export class FacadeConverter extends base.TranspilerBase {
           '<' + this.generateDartTypeName(node.elementType, addInsideTypeArgument(options)) + '>';
     } else if (node.kind === ts.SyntaxKind.NumberKeyword) {
       name = 'num';
-    } else if (node.kind === ts.SyntaxKind.LiteralType) {
-      if (ts.isLiteralTypeNode(node) && ts.isLiteralExpression(node.literal)) {
-        comment = `'${node.literal.text}'`;
+    } else if (ts.isLiteralTypeNode(node)) {
+      const literal = node.literal;
+      if (ts.isLiteralExpression(literal)) {
+        comment = `'${literal.text}'`;
         name = 'String';
+      } else if (literal.kind === ts.SyntaxKind.TrueKeyword) {
+        name = 'bool';
+        comment = 'true';
+      } else if (literal.kind === ts.SyntaxKind.FalseKeyword) {
+        name = 'bool';
+        comment = 'false';
       }
     } else if (ts.isStringLiteral(node) || node.kind === ts.SyntaxKind.StringKeyword) {
       name = 'String';
diff --git a/test/type_test.ts b/test/type_test.ts
index c5df3c5..3a4fb69 100644
--- a/test/type_test.ts
+++ b/test/type_test.ts
@@ -31,6 +31,12 @@ abstract class Foo {
   external Foo bar();
 }`);
   });
+  it('supports true and false return types', () => {
+    expectTranslate('export function f(): true;').to.equal(`@JS()
+external bool /*true*/ f();`);
+    expectTranslate('export function g(): false;').to.equal(`@JS()
+external bool /*false*/ g();`);
+  });
 
   it('comment type literals', () => {
     expectTranslate('var x: {x: string, y: number};').to.equal(`@JS()