From 9a27b59e5fb12cba0c7a4a2f3b4ceaae769d406a Mon Sep 17 00:00:00 2001
From: fumer-fubotv <89787347+fumer-fubotv@users.noreply.github.com>
Date: Wed, 28 Feb 2024 12:05:03 -0800
Subject: [PATCH] TBD-204: Empty interfaces break the parser

---
 src/parser/Parser.ts                                  | 9 +++++----
 src/parser/tests/statement/InterfaceStatement.spec.ts | 9 +++++++++
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/parser/Parser.ts b/src/parser/Parser.ts
index b3f956726..75bff4cf9 100644
--- a/src/parser/Parser.ts
+++ b/src/parser/Parser.ts
@@ -489,6 +489,11 @@ export class Parser {
         let body = [] as Statement[];
         while (this.checkAny(TokenKind.Comment, TokenKind.Identifier, TokenKind.At, ...AllowedProperties)) {
             try {
+                //break out of this loop if we encountered the `EndInterface` token not followed by `as`
+                if (this.check(TokenKind.EndInterface) && !this.checkNext(TokenKind.As)) {
+                    break;
+                }
+
                 let decl: Statement;
 
                 //collect leading annotations
@@ -528,10 +533,6 @@ export class Parser {
 
             //ensure statement separator
             this.consumeStatementSeparators();
-            //break out of this loop if we encountered the `EndInterface` token not followed by `as`
-            if (this.check(TokenKind.EndInterface) && !this.checkNext(TokenKind.As)) {
-                break;
-            }
         }
 
         //consume the final `end interface` token
diff --git a/src/parser/tests/statement/InterfaceStatement.spec.ts b/src/parser/tests/statement/InterfaceStatement.spec.ts
index 7d952d100..7aae48e90 100644
--- a/src/parser/tests/statement/InterfaceStatement.spec.ts
+++ b/src/parser/tests/statement/InterfaceStatement.spec.ts
@@ -96,4 +96,13 @@ describe('InterfaceStatement', () => {
             end interface
         `, undefined, undefined, undefined, true);
     });
+
+    it('supports empty interfaces', () => {
+        const file = program.setFile('source/main.bs', `
+           interface SomeInterface
+           end interface
+        `);
+        program.validate();
+        expectZeroDiagnostics(file);
+    });
 });