Bug#264097: Proposed patch

[Tim Retout]

The attached patch adds support for highlighting of multi-line
preprocessor statements, and subclasses the c_comment state to account
for having to escape newlines.

-- 
Tim Retout <[EMAIL PROTECTED]>

Add support for highlighting of multi-line C preprocessor statements.
 -- Tim Retout <[EMAIL PROTECTED]>  Thu, 25 Oct 2007 22:12:33 +0100

diff --git a/states/hl/c_ppline.st b/states/hl/c_ppline.st
index 2bde859..b3fcf40 100644
--- a/states/hl/c_ppline.st
+++ b/states/hl/c_ppline.st
@@ -12,7 +12,7 @@ state c_ppline extends CHighlight
   /\/\*/ {
     comment_face (true);
     language_print ($0);
-    call (c_comment);
+    call (c_ppline_comment);
     comment_face (false);
   }
   /* Include line. */
@@ -51,6 +51,9 @@ state c_ppline extends CHighlight
     call (c_ppline_tokensequence);
     return;
   }
+  /\\\\\n/ {
+    language_print ($0);
+  }
   /\n/ {
     language_print ($0);
     return;
@@ -81,6 +84,9 @@ state c_ppline_include extends CHighlight
     call (c_ppline_comments_strings_chars);
     return;
   }
+  /\\\\\n/ {
+    language_print ($0);
+  }
   /\n/ {
     language_print ($0);
     return;
@@ -106,6 +112,9 @@ state c_ppline_define extends CHighlight
     call (c_ppline_comments_strings_chars);
     return;
   }
+  /\\\\\n/ {
+    language_print ($0);
+  }
   /\n/ {
     language_print ($0);
     return;
@@ -118,7 +127,7 @@ state c_ppline_comments_strings_chars extends CHighlight
   /\/\*/ {
     comment_face (true);
     language_print ($0);
-    call (c_comment);
+    call (c_ppline_comment);
     comment_face (false);
   }
   /* String constants. */
@@ -134,6 +143,9 @@ state c_ppline_comments_strings_chars extends CHighlight
     language_print ($0);
     string_face (false);
   }
+  /\\\\\n/ {
+    language_print ($0);
+  }
   /\n/ {
     language_print ($0);
     return;
@@ -146,7 +158,7 @@ state c_ppline_tokensequence extends CHighlight
   /\/\*/ {
     comment_face (true);
     language_print ($0);
-    call (c_comment);
+    call (c_ppline_comment);
     comment_face (false);
   }
   /* String constants. */
@@ -181,6 +193,20 @@ state c_ppline_tokensequence extends CHighlight
     language_print ($0);
     variable_name_face (false);
   }
+  /\\\\\n/ {
+    language_print ($0);
+  }
+  /\n/ {
+    language_print ($0);
+    return;
+  }
+}
+
+/* Comments within pre-processor directives need escaped newlines. */
+state c_ppline_comment extends c_comment {
+  /\\\\\n/ {
+    language_print ($0);
+  }
   /\n/ {
     language_print ($0);
     return;