From a9bb2387a1fff1cc038424eadc927402bcbea267 Mon Sep 17 00:00:00 2001
From: Bob Nystrom <robert@stuffwithstuff.com>
Date: Sun, 4 Jan 2015 13:00:53 -0800
Subject: [PATCH] Handle empty (or comment-only) files. Fix #57.

---
 src/main.c                                    | 8 ++------
 src/wren_compiler.c                           | 4 +---
 test/comments/only_line_comment.wren          | 1 +
 test/comments/only_line_comment_and_line.wren | 1 +
 test/empty_file.wren                          | 0
 5 files changed, 5 insertions(+), 9 deletions(-)
 create mode 100644 test/comments/only_line_comment.wren
 create mode 100644 test/comments/only_line_comment_and_line.wren
 create mode 100644 test/empty_file.wren

diff --git a/src/main.c b/src/main.c
index f0198044..871933d5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -90,12 +90,8 @@ static int runRepl(WrenVM* vm)
       return 0;
     }
 
-    // Do nothing if we received an empty line.
-    if (strcmp(line, "\n") != 0)
-    {
-      // TODO: Handle failure.
-      wrenInterpret(vm, "Prompt", line);
-    }
+    // TODO: Handle failure.
+    wrenInterpret(vm, "Prompt", line);
 
     free(line);
 
diff --git a/src/wren_compiler.c b/src/wren_compiler.c
index a11bca78..ccbea58c 100644
--- a/src/wren_compiler.c
+++ b/src/wren_compiler.c
@@ -2747,7 +2747,7 @@ ObjFn* wrenCompile(WrenVM* vm, const char* sourcePath, const char* source)
 
   WREN_UNPIN(vm);
 
-  for (;;)
+  while (!match(&compiler, TOKEN_EOF))
   {
     definition(&compiler);
 
@@ -2757,8 +2757,6 @@ ObjFn* wrenCompile(WrenVM* vm, const char* sourcePath, const char* source)
       consume(&compiler, TOKEN_EOF, "Expect end of file.");
       break;
     }
-
-    if (match(&compiler, TOKEN_EOF)) break;
   }
 
   emit(&compiler, CODE_NULL);
diff --git a/test/comments/only_line_comment.wren b/test/comments/only_line_comment.wren
new file mode 100644
index 00000000..e2c01e9c
--- /dev/null
+++ b/test/comments/only_line_comment.wren
@@ -0,0 +1 @@
+// comment
\ No newline at end of file
diff --git a/test/comments/only_line_comment_and_line.wren b/test/comments/only_line_comment_and_line.wren
new file mode 100644
index 00000000..fef83a9c
--- /dev/null
+++ b/test/comments/only_line_comment_and_line.wren
@@ -0,0 +1 @@
+// comment
diff --git a/test/empty_file.wren b/test/empty_file.wren
new file mode 100644
index 00000000..e69de29b