From c09cd7512491cee1e82c1ad8128ce9fd4bc3f79b Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 22 Sep 2017 23:32:28 +0200
Subject: Initial modularization with both Clang and VC hacks

Note: gave up on VC about half way though.
---
 libbutl/regex.mxx | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 libbutl/regex.mxx

(limited to 'libbutl/regex.mxx')

diff --git a/libbutl/regex.mxx b/libbutl/regex.mxx
new file mode 100644
index 0000000..ca677a5
--- /dev/null
+++ b/libbutl/regex.mxx
@@ -0,0 +1,98 @@
+// file      : libbutl/regex.mxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef __cpp_modules
+#pragma once
+#endif
+
+// C includes.
+
+#ifndef __cpp_lib_modules
+#include <regex>
+#include <iosfwd>
+#include <string>
+#include <utility> // pair
+
+#include <locale>
+#include <cstddef> // size_t
+#include <utility> // move(), make_pair()
+#endif
+
+#if defined(__clang__) && __has_include(<__config>)
+#  include <__config> // _LIBCPP_VERSION
+#endif
+
+// Other includes.
+
+#ifdef __cpp_modules
+export module butl.regex;
+#ifdef __cpp_lib_modules
+import std.core;
+import std.io;
+//@@ MOD TODO import std.regex;
+#endif
+#endif
+
+#include <libbutl/export.hxx>
+
+LIBBUTL_MODEXPORT namespace butl
+{
+  // Call specified append() function for non-matched substrings and matched
+  // substring replacements returning true if search succeeded. The function
+  // must be callable with the following signature:
+  //
+  // void
+  // append(basic_string<C>::iterator begin, basic_string<C>::iterator end);
+  //
+  // The regex semantics is like that of std::regex_replace() extended the
+  // standard ECMA-262 substitution escape sequences with a subset of Perl
+  // sequences:
+  //
+  // \\, \u, \l, \U, \L, \E, \1, ..., \9
+  //
+  // Notes and limitations:
+  //
+  // - The only valid regex_constants flags are match_default,
+  //   format_first_only and format_no_copy.
+  //
+  // - If backslash doesn't start any of the listed sequences then it is
+  //   silently dropped and the following character is copied as is.
+  //
+  // - The character case conversion is performed according to the global
+  //   C++ locale (which is, unless changed, is the same as C locale and
+  //   both default to the POSIX locale aka "C").
+  //
+  template <typename C, typename F>
+  bool
+  regex_replace_ex (const std::basic_string<C>&,
+                    const std::basic_regex<C>&,
+                    const std::basic_string<C>& fmt,
+                    F&& append,
+                    std::regex_constants::match_flag_type =
+                      std::regex_constants::match_default);
+
+  // As above but concatenate non-matched substrings and matched substring
+  // replacements into a string returning it as well as whether the search
+  // succeeded.
+  //
+  template <typename C>
+  std::pair<std::basic_string<C>, bool>
+  regex_replace_ex (const std::basic_string<C>&,
+                    const std::basic_regex<C>&,
+                    const std::basic_string<C>& fmt,
+                    std::regex_constants::match_flag_type =
+                      std::regex_constants::match_default);
+}
+
+LIBBUTL_MODEXPORT namespace std
+{
+  // Print regex error description but only if it is meaningful (this is also
+  // why we have to print leading colon).
+  //
+  LIBBUTL_SYMEXPORT ostream&
+  operator<< (ostream&, const regex_error&);
+}
+
+#include <libbutl/regex.ixx>
+#include <libbutl/regex.txx>
-- 
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