From a54abb2f4e5e66877619097bfd281261f99c5103 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 4 May 2020 07:27:47 +0200
Subject: Add recognition for line-leading `%` as token

---
 libbuild2/parser.cxx | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'libbuild2/parser.cxx')

diff --git a/libbuild2/parser.cxx b/libbuild2/parser.cxx
index e87ca95..000670b 100644
--- a/libbuild2/parser.cxx
+++ b/libbuild2/parser.cxx
@@ -335,6 +335,11 @@ namespace build2
 
     while (tt != type::eos && !(one && parsed))
     {
+      // Issue better diagnostics for stray `%`.
+      //
+      if (tt == type::percent)
+        fail (t) << "recipe without target";
+
       // Extract attributes if any.
       //
       assert (attributes_.empty ());
-- 
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