From 353438a94953bf4d093af0d84decd5ec7529ed34 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 20 Jun 2018 09:51:56 +0200
Subject: Add $process.run() and $process.run_regex() functions

$process.run(<prog>[ <args>...])

Return trimmed stdout.

$process.run_regex(<prog>[ <args>...], <pat> [, <fmt>])

Return stdout lines matched and optionally processed with regex.

Each line of stdout (including the customary trailing blank) is matched (as a
whole) against <pat> and, if successful, returned, optionally processed with
<fmt>, as an element of a list.
---
 build2/utility.cxx | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'build2/utility.cxx')

diff --git a/build2/utility.cxx b/build2/utility.cxx
index cbae507..07cf88e 100644
--- a/build2/utility.cxx
+++ b/build2/utility.cxx
@@ -254,10 +254,14 @@ namespace build2
     fail (loc) << "unable to execute " << args[0] << ": " << e << endf;
   }
 
-  const string empty_string;
-  const path empty_path;
+  const string   empty_string;
+  const path     empty_path;
   const dir_path empty_dir_path;
 
+  const optional<string>   nullopt_string;
+  const optional<path>     nullopt_path;
+  const optional<dir_path> nullopt_dir_path;
+
   void
   append_options (cstrings& args, const lookup& l, const char* e)
   {
-- 
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