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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* expand/file_line.cpp
* - file! line! and macro_path! macros
*/
#include <synext.hpp>
#include "../parse/common.hpp"
#include "../parse/ttstream.hpp"
#include <ast/crate.hpp>
namespace {
const Span& get_top_span(const Span& sp) {
if( sp.outer_span ) {
return get_top_span(*sp.outer_span);
}
else {
return sp;
}
}
}
class CExpanderFile:
public ExpandProcMacro
{
::std::unique_ptr<TokenStream> expand(const Span& sp, const AST::Crate& crate, const TokenTree& tt, AST::Module& mod) override
{
return box$( TTStreamO(sp, TokenTree(Token(TOK_STRING, ::std::string(get_top_span(sp).filename.c_str())))) );
}
};
class CExpanderLine:
public ExpandProcMacro
{
::std::unique_ptr<TokenStream> expand(const Span& sp, const AST::Crate& crate, const TokenTree& tt, AST::Module& mod) override
{
return box$( TTStreamO(sp, TokenTree(Token((uint64_t)get_top_span(sp).start_line, CORETYPE_U32))) );
}
};
class CExpanderColumn:
public ExpandProcMacro
{
::std::unique_ptr<TokenStream> expand(const Span& sp, const AST::Crate& crate, const TokenTree& tt, AST::Module& mod) override
{
return box$( TTStreamO(sp, TokenTree(Token((uint64_t)get_top_span(sp).start_ofs, CORETYPE_U32))) );
}
};
class CExpanderUnstableColumn:
public ExpandProcMacro
{
::std::unique_ptr<TokenStream> expand(const Span& sp, const AST::Crate& crate, const TokenTree& tt, AST::Module& mod) override
{
return box$( TTStreamO(sp, TokenTree(Token((uint64_t)get_top_span(sp).start_ofs, CORETYPE_U32))) );
}
};
class CExpanderModulePath:
public ExpandProcMacro
{
::std::unique_ptr<TokenStream> expand(const Span& sp, const AST::Crate& crate, const TokenTree& tt, AST::Module& mod) override
{
::std::string path_str;
path_str += crate.m_crate_name;
for(const auto& comp : mod.path().nodes()) {
path_str += "::";
path_str += comp.name().c_str();
}
return box$( TTStreamO(sp, TokenTree( Token(TOK_STRING, mv$(path_str)) )) );
}
};
STATIC_MACRO("file", CExpanderFile);
STATIC_MACRO("line", CExpanderLine);
STATIC_MACRO("column", CExpanderColumn);
STATIC_MACRO("__rust_unstable_column", CExpanderUnstableColumn);
STATIC_MACRO("module_path", CExpanderModulePath);
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