From 68803e8bc8888abdc65cba1a1a6d8b4e9eeea27e Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sun, 4 Oct 2009 10:49:52 +0200
Subject: Add a parser for std::map

---
 cli/runtime-source.cxx | 59 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

(limited to 'cli')

diff --git a/cli/runtime-source.cxx b/cli/runtime-source.cxx
index 3cb5f2e..13718b7 100644
--- a/cli/runtime-source.cxx
+++ b/cli/runtime-source.cxx
@@ -12,7 +12,8 @@ generate_runtime_source (context& ctx)
 {
   ostream& os (ctx.os);
 
-  os << "#include <string>" << endl
+  os << "#include <map>" << endl
+     << "#include <string>" << endl
      << "#include <vector>" << endl
      << "#include <ostream>" << endl
      << "#include <sstream>" << endl
@@ -164,6 +165,62 @@ generate_runtime_source (context& ctx)
      << "}"
      << "};";
 
+  // parser<std::map<K,V>>
+  //
+  os << "template <typename K, typename V>" << endl
+     << "struct parser<std::map<K, V> >"
+     << "{"
+     << "static int" << endl
+     << "parse (std::map<K, V>& m, char** argv, int n)"
+     << "{"
+     << "if (n > 1)"
+     << "{"
+     << "std::string s (argv[1]);"
+     << "std::string::size_type p (s.find ('='));"
+     << endl
+     << "if (p == std::string::npos)"
+     << "{"
+     << "K k = K ();"
+     << endl
+     << "if (!s.empty ())"
+     << "{"
+     << "std::istringstream ks (s);"
+     << endl
+     << "if (!(ks >> k && ks.eof ()))" << endl
+     << "throw invalid_value (argv[0], argv[1]);"
+     << "}"
+     << "m[k] = V ();"
+     << "}"
+     << "else"
+     << "{"
+     << "K k = K ();"
+     << "V v = V ();"
+     << "std::string kstr (s, 0, p);"
+     << "std::string vstr (s, p + 1);"
+     << endl
+     << "if (!kstr.empty ())"
+     << "{"
+     << "std::istringstream ks (kstr);"
+     << endl
+     << "if (!(ks >> k && ks.eof ()))" << endl
+     << "throw invalid_value (argv[0], argv[1]);"
+     << "}"
+     << "if (!vstr.empty ())"
+     << "{"
+     << "std::istringstream vs (vstr);"
+     << endl
+     << "if (!(vs >> v && vs.eof ()))" << endl
+     << "throw invalid_value (argv[0], argv[1]);"
+     << "}"
+     << "m[k] = v;"
+     << "}"
+     << "return 2;"
+     << "}"
+     << "else" << endl
+     << "throw missing_value (argv[0]);"
+     << "}"
+     << "};";
+
   // Parser thunk.
   //
   os << "template <typename X, typename T, T X::*P>" << endl
-- 
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