From b587f9662a7b6f00f9ce48ddf2dea1a4fb18a6db Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Wed, 29 Apr 2009 23:26:16 +0000
Subject: [PATCH] Add support for a character after a command line option. Like
 '-Os'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70437 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Support/CommandLine.h | 23 +++++++++++++++++++++++
 lib/Support/CommandLine.cpp        |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/include/llvm/Support/CommandLine.h b/include/llvm/Support/CommandLine.h
index 1b625588d28..fa3b8701d34 100644
--- a/include/llvm/Support/CommandLine.h
+++ b/include/llvm/Support/CommandLine.h
@@ -679,6 +679,28 @@ public:
 
 EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
 
+//--------------------------------------------------
+// parser<char>
+//
+template<>
+class parser<char> : public basic_parser<char> {
+public:
+  // parse - Return true on error.
+  bool parse(Option &, const char *, const std::string &Arg,
+             char &Value) {
+    Value = Arg[0];
+    return false;
+  }
+
+  // getValueName - Overload in subclass to provide a better default value.
+  virtual const char *getValueName() const { return "char"; }
+
+  // An out-of-line virtual method to provide a 'home' for this class.
+  virtual void anchor();
+};
+
+EXTERN_TEMPLATE_INSTANTIATION(class basic_parser<char>);
+
 //===----------------------------------------------------------------------===//
 // applicator class - This class is used because we must use partial
 // specialization to handle literal string arguments specially (const char* does
@@ -923,6 +945,7 @@ public:
 EXTERN_TEMPLATE_INSTANTIATION(class opt<unsigned>);
 EXTERN_TEMPLATE_INSTANTIATION(class opt<int>);
 EXTERN_TEMPLATE_INSTANTIATION(class opt<std::string>);
+EXTERN_TEMPLATE_INSTANTIATION(class opt<char>);
 EXTERN_TEMPLATE_INSTANTIATION(class opt<bool>);
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index e4f65ba1de9..4922560200a 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -45,10 +45,12 @@ TEMPLATE_INSTANTIATION(class basic_parser<unsigned>);
 TEMPLATE_INSTANTIATION(class basic_parser<double>);
 TEMPLATE_INSTANTIATION(class basic_parser<float>);
 TEMPLATE_INSTANTIATION(class basic_parser<std::string>);
+TEMPLATE_INSTANTIATION(class basic_parser<char>);
 
 TEMPLATE_INSTANTIATION(class opt<unsigned>);
 TEMPLATE_INSTANTIATION(class opt<int>);
 TEMPLATE_INSTANTIATION(class opt<std::string>);
+TEMPLATE_INSTANTIATION(class opt<char>);
 TEMPLATE_INSTANTIATION(class opt<bool>);
 
 void Option::anchor() {}
@@ -60,6 +62,7 @@ void parser<unsigned>::anchor() {}
 void parser<double>::anchor() {}
 void parser<float>::anchor() {}
 void parser<std::string>::anchor() {}
+void parser<char>::anchor() {}
 
 //===----------------------------------------------------------------------===//
 
-- 
2.34.1