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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* include/span.hpp
* - Spans and error handling
*/
#pragma once
#include <rc_string.hpp>
#include <functional>
#include <memory>
enum ErrorType
{
E0000,
};
enum WarningType
{
W0000,
};
class Position;
struct ProtoSpan
{
RcString filename;
unsigned int start_line;
unsigned int start_ofs;
};
struct Span
{
::std::shared_ptr<Span> outer_span; // Expansion target for macros
RcString filename;
unsigned int start_line;
unsigned int start_ofs;
unsigned int end_line;
unsigned int end_ofs;
Span(RcString filename, unsigned int start_line, unsigned int start_ofs, unsigned int end_line, unsigned int end_ofs):
filename( ::std::move(filename) ),
start_line(start_line),
start_ofs(start_ofs),
end_line(end_line),
end_ofs(end_ofs)
{}
Span(const Span& x);
Span(const Position& position);
Span();
void bug(::std::function<void(::std::ostream&)> msg) const;
void error(ErrorType tag, ::std::function<void(::std::ostream&)> msg) const;
void warning(WarningType tag, ::std::function<void(::std::ostream&)> msg) const;
void note(::std::function<void(::std::ostream&)> msg) const;
friend ::std::ostream& operator<<(::std::ostream& os, const Span& sp);
};
template<typename T>
struct Spanned
{
Span sp;
T ent;
};
template<typename T>
Spanned<T> make_spanned(Span sp, T val) {
return Spanned<T> { ::std::move(sp), ::std::move(val) };
}
#define ERROR(span, code, msg) do { ::Span(span).error(code, [&](::std::ostream& os) { os << msg; }); throw ::std::runtime_error("Error fell through" #code); } while(0)
#define WARNING(span, code, msg) do { ::Span(span).warning(code, [&](::std::ostream& os) { os << msg; }); } while(0)
#define BUG(span, msg) do { ::Span(span).bug([&](::std::ostream& os) { os << __FILE__ << ":" << __LINE__ << ": " << msg; }); throw ::std::runtime_error("Bug fell through"); } while(0)
#define TODO(span, msg) do { const char* __TODO_func = __func__; ::Span(span).bug([&](::std::ostream& os) { os << __FILE__ << ":" << __LINE__ << ": TODO: " << __TODO_func << " - " << msg; }); throw ::std::runtime_error("Bug (todo) fell through"); } while(0)
#define ASSERT_BUG(span, cnd, msg) do { if( !(cnd) ) { ::Span(span).bug([&](::std::ostream& os) { os << "ASSERT FAIL: " << __FILE__ << ":" << __LINE__ << ":" #cnd << ": " << msg; }); throw ::std::runtime_error("Bug fell through"); } } while(0)
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