libraries/mrw-cxx
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added --version to arguments; refs #7

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This commit is contained in:
Marc Wäckerlin
2013-10-21 08:58:17 +00:00
parent 2a00a46865
commit 54f7027c4d
1 changed files with 50 additions and 2 deletions
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52
src/mrw/args.hxx
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@@ -4,8 +4,8 @@
*/
// 1 2 3 4 5 6 7 8
// 45678901234567890123456789012345678901234567890123456789012345678901234567890
#ifndef __MRW__
#define __MRW__
#ifndef __MRW_ARGS__
#define __MRW_ARGS__
#include <mrw/checkcxx11.hxx>
#include <mrw/iomanip.hxx>
@@ -26,6 +26,10 @@
@refs MRW__OLD_PRE11_COMPILER is set.
*/
// Add version information for @c what and @c ident
const std::string MRW_IDENT("$Id: " PACKAGENAME "-" PACKAGEVERSION " $");
const std::string MRW_WHAT("#(@)" PACKAGENAME "-" PACKAGEVERSION);
namespace mrw {
/// Cool and easy evaluation of commandline arguments in C++11.
/** Evaluating command line arguments is extremely easy with this library:
@@ -44,6 +48,7 @@ namespace mrw {
args::parse(argc, argv, "This is an example for argument processing.",
{
{"h", "help", "show this help", {args::help(), args::exit()}},
{"v", "version", "show version", {args::version(), args::exit()}},
{"r", "repeat", "number of repetitions",
{args::param(r, "number")}},
{"f", "flag", "check a flag", {args::param(flag)}},
@@ -332,6 +337,26 @@ namespace mrw {
std::cout<<std::endl;
}
}
/// @return version information
std::string version_text() {
# ifdef PACKAGEVERSION
# ifdef PACKAGENAME
std::string v(": " PACKAGENAME "-" PACKAGEVERSION);
# else
std::string v("-" PACKAGEVERSION);
# endif
# else
# ifdef PACKAGENAME
std::string v(": " PACKAGENAME);
# else
std::string v;
# endif
# endif
return filename() + v;
}
void show_version() {
std::cout<<version_text()<<std::endl;
}
void help_no_arg() {
show_help();
}
@@ -344,9 +369,32 @@ namespace mrw {
param_ptr help() {
return func(args::help_no_arg);
}
param_ptr version() {
return func(args::show_version);
}
param_ptr exit() {
return func(args::do_exit);
}
/// Sets up an argument list containing help and version.
list defaults() {
#ifdef MRW__OLD_PRE11_COMPILER
list res;
decl::param_list h;
h.push_back(help());
h.push_back(exit());
decl::param_list v;
v.push_back(version());
v.push_back(exit());
res.push_back(decl("h", "help", "show help", h));
res.push_back(decl("v", "version", "show version", v));
return res;
#else // New C++ standard C++11 is great:
return list({
{"h", "help", "show help", {help(), exit()}},
{"v", "version", "show version", {version(), exit()}}
});
#endif
}
}
}
#endif