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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* hir_typeck/static.cpp
* - Non-inferred type checking
*/
#pragma once
#include <hir/hir.hpp>
#include "common.hpp"
#include "impl_ref.hpp"
enum class MetadataType {
Unknown, // Unknown still
None, // Sized pointer
Zero, // No metadata, but still unsized
Slice, // usize metadata
TraitObject, // VTable pointer metadata
};
class StaticTraitResolve
{
public:
const ::HIR::Crate& m_crate;
const ::HIR::GenericParams* m_impl_generics;
const ::HIR::GenericParams* m_item_generics;
::std::map< ::HIR::TypeRef, ::HIR::TypeRef> m_type_equalities;
::HIR::SimplePath m_lang_Copy;
::HIR::SimplePath m_lang_Clone; // 1.29
::HIR::SimplePath m_lang_Drop;
::HIR::SimplePath m_lang_Sized;
::HIR::SimplePath m_lang_Unsize;
::HIR::SimplePath m_lang_Fn;
::HIR::SimplePath m_lang_FnMut;
::HIR::SimplePath m_lang_FnOnce;
::HIR::SimplePath m_lang_Box;
::HIR::SimplePath m_lang_PhantomData;
private:
mutable ::std::map< ::HIR::TypeRef, bool > m_copy_cache;
mutable ::std::map< ::HIR::TypeRef, bool > m_clone_cache;
mutable ::std::map< ::HIR::TypeRef, bool > m_drop_cache;
public:
StaticTraitResolve(const ::HIR::Crate& crate):
m_crate(crate),
m_impl_generics(nullptr),
m_item_generics(nullptr)
{
m_lang_Copy = m_crate.get_lang_item_path_opt("copy");
if( TARGETVER_1_29 )
m_lang_Clone = m_crate.get_lang_item_path_opt("clone");
m_lang_Drop = m_crate.get_lang_item_path_opt("drop");
m_lang_Sized = m_crate.get_lang_item_path_opt("sized");
m_lang_Unsize = m_crate.get_lang_item_path_opt("unsize");
m_lang_Fn = m_crate.get_lang_item_path_opt("fn");
m_lang_FnMut = m_crate.get_lang_item_path_opt("fn_mut");
m_lang_FnOnce = m_crate.get_lang_item_path_opt("fn_once");
m_lang_Box = m_crate.get_lang_item_path_opt("owned_box");
m_lang_PhantomData = m_crate.get_lang_item_path_opt("phantom_data");
prep_indexes();
}
private:
void prep_indexes();
public:
bool has_self() const {
return m_impl_generics ? true : false;
}
const ::HIR::GenericParams& impl_generics() const {
static ::HIR::GenericParams empty;
return m_impl_generics ? *m_impl_generics : empty;
}
const ::HIR::GenericParams& item_generics() const {
static ::HIR::GenericParams empty;
return m_item_generics ? *m_item_generics : empty;
}
/// \brief State manipulation
/// \{
NullOnDrop<const ::HIR::GenericParams> set_impl_generics(const ::HIR::GenericParams& gps) {
set_impl_generics_raw(gps);
return NullOnDrop<const ::HIR::GenericParams>(m_impl_generics);
}
NullOnDrop<const ::HIR::GenericParams> set_item_generics(const ::HIR::GenericParams& gps) {
set_item_generics_raw(gps);
return NullOnDrop<const ::HIR::GenericParams>(m_item_generics);
}
void set_impl_generics_raw(const ::HIR::GenericParams& gps) {
assert( !m_impl_generics );
m_impl_generics = &gps;
m_type_equalities.clear();
prep_indexes();
}
void clear_impl_generics() {
m_impl_generics = nullptr;
m_type_equalities.clear();
prep_indexes();
}
void set_item_generics_raw(const ::HIR::GenericParams& gps) {
assert( !m_item_generics );
m_item_generics = &gps;
m_type_equalities.clear();
prep_indexes();
}
void clear_item_generics() {
m_item_generics = nullptr;
m_type_equalities.clear();
prep_indexes();
}
/// \}
/// \brief Lookups
/// \{
typedef ::std::function<bool(ImplRef, bool is_fuzzed)> t_cb_find_impl;
bool find_impl(
const Span& sp,
const ::HIR::SimplePath& trait_path, const ::HIR::PathParams& trait_params,
const ::HIR::TypeRef& type,
t_cb_find_impl found_cb
) const
{
return this->find_impl(sp, trait_path, &trait_params, type, found_cb);
}
bool find_impl(
const Span& sp,
const ::HIR::SimplePath& trait_path, const ::HIR::PathParams* trait_params,
const ::HIR::TypeRef& type,
t_cb_find_impl found_cb,
bool dont_handoff_to_specialised = false
) const;
private:
bool find_impl__check_bound(
const Span& sp,
const ::HIR::SimplePath& trait_path, const ::HIR::PathParams* trait_params,
const ::HIR::TypeRef& type,
t_cb_find_impl found_cb,
const ::HIR::GenericBound& bound
) const;
bool find_impl__check_crate(
const Span& sp,
const ::HIR::SimplePath& trait_path, const ::HIR::PathParams* trait_params,
const ::HIR::TypeRef& type,
t_cb_find_impl found_cb,
const ::HIR::TraitImpl& impl
) const;
bool find_impl__check_crate_raw(
const Span& sp,
const ::HIR::SimplePath& des_trait_path, const ::HIR::PathParams* des_trait_params, const ::HIR::TypeRef& des_type,
const ::HIR::GenericParams& impl_params_def, const ::HIR::PathParams& impl_trait_params, const ::HIR::TypeRef& impl_type,
::std::function<bool(::std::vector<const ::HIR::TypeRef*>, ::std::vector<::HIR::TypeRef>, ::HIR::Compare)>
) const;
::HIR::Compare check_auto_trait_impl_destructure(
const Span& sp,
const ::HIR::SimplePath& trait, const ::HIR::PathParams* params_ptr,
const ::HIR::TypeRef& type
) const;
public:
void expand_associated_types(const Span& sp, ::HIR::TypeRef& input) const;
bool expand_associated_types_single(const Span& sp, ::HIR::TypeRef& input) const;
private:
void expand_associated_types_inner(const Span& sp, ::HIR::TypeRef& input) const;
bool expand_associated_types__UfcsKnown(const Span& sp, ::HIR::TypeRef& input, bool recurse=true) const;
bool replace_equalities(::HIR::TypeRef& input) const;
public:
/// \}
/// Iterate over in-scope bounds (function then top)
bool iterate_bounds( ::std::function<bool(const ::HIR::GenericBound&)> cb) const;
/// Locate a named trait in the provied trait (either itself or as a parent trait)
bool find_named_trait_in_trait(const Span& sp,
const ::HIR::SimplePath& des, const ::HIR::PathParams& params,
const ::HIR::Trait& trait_ptr, const ::HIR::SimplePath& trait_path, const ::HIR::PathParams& pp,
const ::HIR::TypeRef& self_type,
::std::function<void(const ::HIR::PathParams&, ::std::map< RcString, ::HIR::TypeRef>)> callback
) const;
///
bool trait_contains_type(const Span& sp, const ::HIR::GenericPath& trait_path, const ::HIR::Trait& trait_ptr, const char* name, ::HIR::GenericPath& out_path) const;
bool iterate_aty_bounds(const Span& sp, const ::HIR::Path::Data::Data_UfcsKnown& pe, ::std::function<bool(const ::HIR::TraitPath&)> cb) const;
// --------------
// Common bounds
// -------------
bool type_is_copy(const Span& sp, const ::HIR::TypeRef& ty) const;
bool type_is_clone(const Span& sp, const ::HIR::TypeRef& ty) const; // 1.29
bool type_is_sized(const Span& sp, const ::HIR::TypeRef& ty) const;
bool type_is_impossible(const Span& sp, const ::HIR::TypeRef& ty) const;
bool can_unsize(const Span& sp, const ::HIR::TypeRef& dst, const ::HIR::TypeRef& src) const;
MetadataType metadata_type(const Span& sp, const ::HIR::TypeRef& ty, bool err_on_unknown=false) const;
/// Returns `true` if the passed type either implements Drop, or contains a type that implements Drop
bool type_needs_drop_glue(const Span& sp, const ::HIR::TypeRef& ty) const;
const ::HIR::TypeRef* is_type_owned_box(const ::HIR::TypeRef& ty) const;
const ::HIR::TypeRef* is_type_phantom_data(const ::HIR::TypeRef& ty) const;
TAGGED_UNION(ValuePtr, NotFound,
(NotFound, struct{}),
(Constant, const ::HIR::Constant*),
(Static, const ::HIR::Static*),
(Function, const ::HIR::Function*),
(EnumConstructor, struct { const ::HIR::Enum* e; size_t v; }),
(EnumValue, struct { const ::HIR::Enum* e; size_t v; }),
(StructConstructor, struct { const ::HIR::SimplePath* p; const ::HIR::Struct* s; }),
(StructConstant, struct { const ::HIR::SimplePath* p; const ::HIR::Struct* s; })
);
/// `signature_only` - Returns a pointer to an item with the correct signature, not the actual implementation (faster)
ValuePtr get_value(const Span& sp, const ::HIR::Path& p, MonomorphState& out_params, bool signature_only=false) const;
};
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