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#ifndef _HIR_TYPE_HPP_
#define _HIR_TYPE_HPP_
#pragma once
#include <tagged_union.hpp>
#include <hir/path.hpp>
#include <hir/expr_ptr.hpp>
#include <span.hpp>
namespace HIR {
class Struct;
class Enum;
struct ExprNode_Closure;
class TypeRef;
typedef ::std::function<void(unsigned int, const ::HIR::TypeRef&)> t_cb_match_generics;
enum class InferClass
{
None,
Integer,
Float,
};
enum class CoreType
{
Usize, Isize,
U8, I8,
U16, I16,
U32, I32,
U64, I64,
F32, F64,
Bool,
Char, Str,
};
extern ::std::ostream& operator<<(::std::ostream& os, const CoreType& ct);
enum class BorrowType
{
Shared,
Unique,
Owned,
};
struct LifetimeRef
{
::std::string name;
bool operator==(const LifetimeRef& x) const {
return name == x.name;
}
};
struct FunctionType
{
bool is_unsafe;
::std::string m_abi;
::std::unique_ptr<TypeRef> m_rettype;
::std::vector<TypeRef> m_arg_types;
};
class TypeRef
{
public:
// Options:
// - Primitive
// - Parameter
// - Path
// - Array
// - Tuple
// - Borrow
// - Pointer
TAGGED_UNION(TypePathBinding, Unbound,
(Unbound, struct {}), // Not yet bound, either during lowering OR during resolution (when associated and still being resolved)
(Opaque, struct {}), // Opaque, i.e. An associated type of a generic (or Self in a trait)
(Struct, const ::HIR::Struct*),
(Enum, const ::HIR::Enum*)
);
TAGGED_UNION(Data, Infer,
(Infer, struct {
unsigned int index = ~0u;
InferClass ty_class = InferClass::None;
}),
(Diverge, struct {}),
(Primitive, ::HIR::CoreType),
(Path, struct {
::HIR::Path path;
TypePathBinding binding;
}),
(Generic, struct {
::std::string name;
unsigned int binding;
}),
(TraitObject, struct {
::std::vector< ::HIR::GenericPath > m_traits;
::HIR::LifetimeRef m_lifetime;
}),
(Array, struct {
::std::unique_ptr<TypeRef> inner;
::HIR::ExprPtr size;
size_t size_val;
}),
(Slice, struct {
::std::unique_ptr<TypeRef> inner;
}),
(Tuple, ::std::vector<TypeRef>),
(Borrow, struct {
::HIR::BorrowType type;
::std::unique_ptr<TypeRef> inner;
}),
(Pointer, struct {
::HIR::BorrowType type;
::std::unique_ptr<TypeRef> inner;
}),
(Function, FunctionType),
(Closure, struct {
const ::HIR::ExprNode_Closure* node;
::std::unique_ptr<TypeRef> m_rettype;
::std::vector<TypeRef> m_arg_types;
})
);
Data m_data;
TypeRef() {}
TypeRef(TypeRef&& ) = default;
TypeRef(const TypeRef& ) = delete;
TypeRef& operator=(TypeRef&& ) = default;
TypeRef& operator=(const TypeRef&) = delete;
struct TagUnit {};
TypeRef(TagUnit ):
m_data( Data::make_Tuple({}) )
{}
TypeRef(::std::vector< ::HIR::TypeRef> sts):
m_data( Data::make_Tuple(mv$(sts)) )
{}
TypeRef(::std::string name, unsigned int slot):
m_data( Data::make_Generic({ mv$(name), slot }) )
{}
TypeRef(::HIR::TypeRef::Data x):
m_data( mv$(x) )
{}
TypeRef(::HIR::CoreType ct):
m_data( Data::make_Primitive(mv$(ct)) )
{}
TypeRef(::HIR::Path p):
m_data( Data::make_Path( {mv$(p), TypePathBinding()} ) )
{}
static TypeRef new_unit() {
return TypeRef(Data::make_Tuple({}));
}
static TypeRef new_diverge() {
return TypeRef(Data::make_Diverge({}));
}
static TypeRef new_borrow(BorrowType bt, TypeRef inner) {
return TypeRef(Data::make_Borrow({bt, box$(mv$(inner))}));
}
static TypeRef new_pointer(BorrowType bt, TypeRef inner) {
return TypeRef(Data::make_Pointer({bt, box$(mv$(inner))}));
}
TypeRef clone() const;
void fmt(::std::ostream& os) const;
bool operator==(const ::HIR::TypeRef& x) const;
bool operator!=(const ::HIR::TypeRef& x) const { return !(*this == x); }
// Match generics in `this` with types from `x`
// Raises a bug against `sp` if there is a form mismatch or `this` has an infer
void match_generics(const Span& sp, const ::HIR::TypeRef& x, t_cb_resolve_type resolve_placeholder, ::std::function<void(unsigned int, const ::HIR::TypeRef&)> callback) const;
bool match_test_generics(const Span& sp, const ::HIR::TypeRef& x, t_cb_resolve_type resolve_placeholder, ::std::function<void(unsigned int, const ::HIR::TypeRef&)> callback) const;
// Compares this type with another, using `resolve_placeholder` to get replacements for generics/infers in `x`
Compare compare_with_paceholders(const Span& sp, const ::HIR::TypeRef& x, t_cb_resolve_type resolve_placeholder) const;
};
extern ::std::ostream& operator<<(::std::ostream& os, const ::HIR::TypeRef& ty);
} // namespace HIR
#endif
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