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// file : cli/runtime-source.cxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2009 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include "runtime-source.hxx"
using namespace std;
void
generate_runtime_source (context& ctx)
{
ostream& os (ctx.os);
os << "#include <string>" << endl
<< "#include <vector>" << endl
<< "#include <ostream>" << endl
<< "#include <sstream>" << endl
<< endl;
os << "namespace cli"
<< "{";
// unknown_option
//
os << "// unknown_option" << endl
<< "//" << endl
<< "unknown_option::" << endl
<< "~unknown_option () throw ()"
<< "{"
<< "}"
<< "void unknown_option::" << endl
<< "print (std::ostream& os) const"
<< "{"
<< "os << \"unknown option '\" << option () << \"'\";"
<< "}"
<< "const char* unknown_option::" << endl
<< "what () const throw ()"
<< "{"
<< "return \"unknown option\";"
<< "}";
// unknown_argument
//
os << "// unknown_argument" << endl
<< "//" << endl
<< "unknown_argument::" << endl
<< "~unknown_argument () throw ()"
<< "{"
<< "}"
<< "void unknown_argument::" << endl
<< "print (std::ostream& os) const"
<< "{"
<< "os << \"unknown argument '\" << argument () << \"'\";"
<< "}"
<< "const char* unknown_argument::" << endl
<< "what () const throw ()"
<< "{"
<< "return \"unknown argument\";"
<< "}";
// missing_value
//
os << "// missing_value" << endl
<< "//" << endl
<< "missing_value::" << endl
<< "~missing_value () throw ()"
<< "{"
<< "}"
<< "void missing_value::" << endl
<< "print (std::ostream& os) const"
<< "{"
<< "os << \"missing value for option '\" << option () << \"'\";"
<< "}"
<< "const char* missing_value::" << endl
<< "what () const throw ()"
<< "{"
<< "return \"missing option value\";"
<< "}";
// invalid_value
//
os << "// invalid_value" << endl
<< "//" << endl
<< "invalid_value::" << endl
<< "~invalid_value () throw ()"
<< "{"
<< "}"
<< "void invalid_value::" << endl
<< "print (std::ostream& os) const"
<< "{"
<< "os << \"invalid value '\" << value () << \"' for option '\"" << endl
<< " << option () << \"'\";"
<< "}"
<< "const char* invalid_value::" << endl
<< "what () const throw ()"
<< "{"
<< "return \"invalid option value\";"
<< "}";
// parser class template & its specializations
//
os << "template <typename X>" << endl
<< "struct parser"
<< "{"
<< "static int" << endl
<< "parse (X& x, char** argv, int n)"
<< "{"
<< "if (n > 1)"
<< "{"
<< "std::istringstream is (argv[1]);"
<< "if (!(is >> x && is.eof ()))" << endl
<< "throw invalid_value (argv[0], argv[1]);"
<< "return 2;"
<< "}"
<< "else" << endl
<< "throw missing_value (argv[0]);"
<< "}"
<< "};";
// parser<bool>
//
os << "template <>" << endl
<< "struct parser<bool>"
<< "{"
<< "static int" << endl
<< "parse (bool& x, char**, int)"
<< "{"
<< "x = true;"
<< "return 1;"
<< "}"
<< "};";
// parser<string>
//
os << "template <>" << endl
<< "struct parser<std::string>"
<< "{"
<< "static int" << endl
<< "parse (std::string& x, char** argv, int n)"
<< "{"
<< "if (n > 1)"
<< "{"
<< "x = argv[1];"
<< "return 2;"
<< "}"
<< "else" << endl
<< "throw missing_value (argv[0]);"
<< "}"
<< "};";
// parser<std::vector<X>>
//
os << "template <typename X>" << endl
<< "struct parser<std::vector<X> >"
<< "{"
<< "static int" << endl
<< "parse (std::vector<X>& v, char** argv, int n)"
<< "{"
<< "X x;"
<< "int i (parser<X>::parse (x, argv, n));"
<< "v.push_back (x);"
<< "return i;"
<< "}"
<< "};";
// Parser thunk.
//
os << "template <typename X, typename T, T X::*P>" << endl
<< "int" << endl
<< "thunk (X& x, char** argv, int n)"
<< "{"
<< "return parser<T>::parse (x.*P, argv, n);"
<< "}";
os << "}"; // namespace cli
}
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