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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* expand/include.cpp
* - include!/include_str!/include_bytes! support
*/
#include <synext_macro.hpp>
#include <parse/common.hpp>
#include <parse/parseerror.hpp> // for GET_CHECK_TOK
#include <parse/ttstream.hpp>
#include <parse/lex.hpp> // Lexer (new files)
#include <ast/expr.hpp>
namespace {
::std::string get_path_relative_to(const ::std::string& base_path, ::std::string path)
{
if( base_path.size() == 0 ) {
return path;
}
else if( base_path[base_path.size()-1] == '/' ) {
return base_path + path;
}
else {
auto slash = base_path.find_last_of('/');
if( slash == ::std::string::npos )
{
return path;
}
else
{
slash += 1;
::std::string rv;
rv.reserve( slash + path.size() );
rv.append( base_path.begin(), base_path.begin() + slash );
rv.append( path.begin(), path.end() );
return rv;
}
}
}
};
class CIncludeExpander:
public ExpandProcMacro
{
::std::unique_ptr<TokenStream> expand(const Span& sp, const AST::Crate& crate, const ::std::string& ident, const TokenTree& tt, AST::Module& mod) override
{
if( ident != "" )
ERROR(sp, E0000, "include! doesn't take an ident");
Token tok;
auto lex = TTStream(tt);
// TODO: Parse+expand
GET_CHECK_TOK(tok, lex, TOK_STRING);
auto path = mv$(tok.str());
GET_CHECK_TOK(tok, lex, TOK_EOF);
::std::string file_path = get_path_relative_to(mod.m_file_info.path, mv$(path));
return box$( Lexer(file_path) );
}
};
// TODO: include_str! and include_bytes!
STATIC_MACRO("include", CIncludeExpander);
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