Re: [PATCH v2 4/4] diff.c: convert builtin funcname patterns to non-GNU extended regex syntax

Junio C Hamano [off-list ref] writes:

Neither has [4/4] on it.  I'd like two patches so that:

 * [PATCH 1/2] applies to bc/maint-diff-hunk-header-fix, so that the
   languages in 1.6.0.2 are fixed for non GNU platforms;

 * After applying [1/2] to bc/maint-diff-hunk-header-fix, I'll merge the
   branch to bc/master-diff-hunk-header-fix and then...

 * [PATCH 2/2] applies on top of it to convert new languages that are
   supported only on 'master' to use xfuncname.

If you apply the previous one on top of 45d9414 (diff.*.xfuncname which
uses "extended" regex's for hunk header selection, 2008-09-18), and then
merge the result to dde4af4 (Merge branch 'bc/maint-diff-hunk-header-fix'
into bc/master-diff-hunk-header-fix, 2008-09-18), you will get some
trivial conflicts.  This patch is [2/2] that applies on top of that merge,
and should result in this:

static const struct funcname_pattern_entry builtin_funcname_pattern[] = {
	{ "bibtex", "(@[a-zA-Z]{1,}[ \t]*\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
	  REG_EXTENDED },
	{ "html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$", REG_EXTENDED },
	{ "java",
	  "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
	  "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$",
	  REG_EXTENDED },
	{ "pascal",
	  "^((procedure|function|constructor|destructor|interface|"
		"implementation|initialization|finalization)[ \t]*.*)$"
	  "|"
	  "^(.*=[ \t]*(class|record).*)$",
	  REG_EXTENDED },
	{ "php", "^[\t ]*((function|class).*)", REG_EXTENDED },
	{ "python", "^[ \t]*((class|def)[ \t].*)$", REG_EXTENDED },
	{ "ruby", "^[ \t]*((class|module|def)[ \t].*)$",
	  REG_EXTENDED },
	{ "tex",
	  "^(\\\\((sub)*section|chapter|part)\\*{0,1}\{.*)$",
	  REG_EXTENDED },
};

-- >8 --
Subject: [PATCH] diff: use extended regexp to find hunk headers

Using ERE elements such as "|" (alternation) by backquoting in BRE
is a GNU extension and should not be done in portable programs.

Signed-off-by: Junio C Hamano <redacted>
---
 diff.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/diff.c b/diff.c
index 5b9b074..a733010 100644
--- a/diff.c
+++ b/diff.c

@@ -1406,7 +1406,7 @@ static const struct funcname_pattern_entry *funcname_pattern(const char *ident)
 static const struct funcname_pattern_entry builtin_funcname_pattern[] = {
 	{ "bibtex", "(@[a-zA-Z]{1,}[ \t]*\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
 	  REG_EXTENDED },
-	{ "html", "^\\s*\\(<[Hh][1-6]\\s.*>.*\\)$", 0 },
+	{ "html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$", REG_EXTENDED },
 	{ "java",
 	  "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
 	  "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$",

@@ -1417,8 +1417,8 @@ static const struct funcname_pattern_entry builtin_funcname_pattern[] = {
 	  "|"
 	  "^(.*=[ \t]*(class|record).*)$",
 	  REG_EXTENDED },
-	{ "php", "^[\t ]*\\(\\(function\\|class\\).*\\)", 0 },
-	{ "python", "^\\s*\\(\\(class\\|def\\)\\s.*\\)$", 0 },
+	{ "php", "^[\t ]*((function|class).*)", REG_EXTENDED },
+	{ "python", "^[ \t]*((class|def)[ \t].*)$", REG_EXTENDED },
 	{ "ruby", "^[ \t]*((class|module|def)[ \t].*)$",
 	  REG_EXTENDED },
 	{ "tex",

-- 
1.6.0.2.414.g0bf11