c++ type information

demangle gives the demangled type, sizeof its size (in bytes).

Usage

demangle(type = "int", ...)
    sizeof(type = "int", ...)

Arguments

type: The type we want to demangle
...: Further argument for cppFunction

Details

The following function is compiled and invoked:


        SEXP demangle_this_type(){
            typedef 
            return wrap( DEMANGLE(type) ) ;
        }

        SEXP sizeof_this_type(){
            typedef 
            return wrap( sizeof(type) ) ;
        }

DEMANGLE is a macro in Rcpp that does the work.

Value

The demangled type, as a string.

References

See this chapter from the GNU C++ library manual.

Author

Romain Francois <[email protected]>

Note

We only know how to demangle with gcc. If you know how to demangle types with your compiler, let us know.

Examples

if (FALSE) { # \dontrun{
    demangle( "int64_t" )
    demangle( "uint64_t" )

    demangle( "NumericVector" )
    demangle( "std::map<std::string,double>" )
    
    sizeof( "long" )
    sizeof( "long long" )
    
} # }