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/*
* MRustC - Mutabah's Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* expand/std_prelude.cpp
* - Handling of no_std/no_core/no_prelude
*/
#include <synext.hpp>
#include <ast/crate.hpp>
class Decorator_NoStd:
public ExpandDecorator
{
public:
AttrStage stage() const override { return AttrStage::Pre; }
void handle(const Span& sp, const AST::Attribute& mi, AST::Crate& crate) const override {
if( crate.m_load_std != AST::Crate::LOAD_STD && crate.m_load_std != AST::Crate::LOAD_CORE ) {
ERROR(sp, E0000, "Invalid use of #![no_std] with itself or #![no_core]");
}
crate.m_load_std = AST::Crate::LOAD_CORE;
}
};
class Decorator_NoCore:
public ExpandDecorator
{
public:
AttrStage stage() const override { return AttrStage::Pre; }
void handle(const Span& sp, const AST::Attribute& mi, AST::Crate& crate) const override {
if( crate.m_load_std != AST::Crate::LOAD_STD && crate.m_load_std != AST::Crate::LOAD_NONE ) {
ERROR(sp, E0000, "Invalid use of #![no_core] with itself or #![no_std]");
}
crate.m_load_std = AST::Crate::LOAD_NONE;
}
};
//class Decorator_Prelude:
// public ExpandDecorator
//{
//public:
// AttrStage stage() const override { return AttrStage::Pre; }
//};
class Decorator_NoPrelude:
public ExpandDecorator
{
public:
AttrStage stage() const override { return AttrStage::Pre; }
void handle(const Span& sp, const AST::Attribute& mi, ::AST::Crate& crate, const AST::Path& path, AST::Module& mod, AST::Item&i) const override {
if( i.is_Module() ) {
i.as_Module().m_insert_prelude = false;
}
else {
ERROR(sp, E0000, "Invalid use of #[no_prelude] on non-module");
}
}
};
class Decorator_PreludeImport:
public ExpandDecorator
{
public:
AttrStage stage() const override { return AttrStage::Post; }
void handle(const Span& sp, const AST::Attribute& mi, ::AST::Crate& crate, const AST::Path& path, AST::Module& mod, AST::Item&i) const override {
if( i.is_Use() ) {
const auto& p = i.as_Use().entries.front().path;
// TODO: Ensure that this statement is a glob (has a name of "")
crate.m_prelude_path = AST::Path(p);
}
else {
ERROR(sp, E0000, "Invalid use of #[prelude_import] on non-module");
}
}
};
STATIC_DECORATOR("no_std", Decorator_NoStd)
STATIC_DECORATOR("no_core", Decorator_NoCore)
//STATIC_DECORATOR("prelude", Decorator_Prelude) // mrustc
STATIC_DECORATOR("prelude_import", Decorator_PreludeImport) // rustc
STATIC_DECORATOR("no_prelude", Decorator_NoPrelude)
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