From d30cc154540a6596290f85ec14510c90233bd1b1 Mon Sep 17 00:00:00 2001
From: Han-Wen Nienhuys <hanwen@xs4all.nl>
Date: Tue, 2 Jan 2007 22:12:23 +0100
Subject: [PATCH] Allow tests for error messages.

Add ly:parser-clear-error and use it to clear error if expect-error is set.
---
 lily/lily-parser-scheme.cc | 13 +++++++++++++
 ly/init.ly                 |  6 +++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lily/lily-parser-scheme.cc b/lily/lily-parser-scheme.cc
index 305359c3f5..44e1011751 100644
--- a/lily/lily-parser-scheme.cc
+++ b/lily/lily-parser-scheme.cc
@@ -271,3 +271,16 @@ LY_DEFINE (ly_parser_error, "ly:parser-error",
 
   return parser;
 }
+
+LY_DEFINE (ly_parser_clear_error, "ly:parser-clear-error",
+	   1, 0, 0, (SCM parser),
+	   "Clear the error flag for the parser.")
+{
+  Lily_parser *p = unsmob_lily_parser (parser);
+  SCM_ASSERT_TYPE (p, parser, SCM_ARG1, __FUNCTION__, "Lilypond parser");
+
+  p->error_level_ = 0;
+  p->lexer_->error_level_ = 0;
+  
+  return SCM_UNSPECIFIED;
+}
diff --git a/ly/init.ly b/ly/init.ly
index 062ca06cbd..102233c5a4 100644
--- a/ly/init.ly
+++ b/ly/init.ly
@@ -19,7 +19,7 @@
 #(define output-count 0) 
 #(define $defaultheader #f)
 #(define version-seen #f)
-
+#(define expect-error #f) 
 
 #(use-modules (scm clip-region))
 \maininput
@@ -44,3 +44,7 @@
     toplevel-book-handler)
    parser
    (apply ly:make-book $defaultpaper $defaultheader toplevel-scores)))
+
+
+#(if expect-error
+  (ly:parser-clear-error parser))
-- 
2.39.5