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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* ast/generics.hpp
* - AST Generics (type parameters, bounds, ...)
*/
#pragma once
#include <string>
#include "types.hpp"
namespace AST {
class TypeParam
{
::AST::AttributeList m_attrs;
Span m_span;
// TODO: use an Ident?
RcString m_name;
::TypeRef m_default;
public:
TypeParam(TypeParam&& x) = default;
TypeParam& operator=(TypeParam&& x) = default;
explicit TypeParam(const TypeParam& x):
m_attrs( x.m_attrs ),
m_span( x.m_span ),
m_name( x.m_name ),
m_default( x.m_default.clone() )
{
}
TypeParam(Span sp, ::AST::AttributeList attrs, RcString name):
m_attrs( ::std::move(attrs) ),
m_span( ::std::move(sp) ),
m_name( ::std::move(name) ),
m_default(m_span)
{}
void setDefault(TypeRef type) {
assert(m_default.is_wildcard());
m_default = ::std::move(type);
}
const ::AST::AttributeList& attrs() const { return m_attrs; }
const Span& span() const { return m_span; }
const RcString& name() const { return m_name; }
const TypeRef& get_default() const { return m_default; }
TypeRef& get_default() { return m_default; }
friend ::std::ostream& operator<<(::std::ostream& os, const TypeParam& tp);
};
class LifetimeParam
{
::AST::AttributeList m_attrs;
Span m_span;
Ident m_name;
public:
LifetimeParam(Span sp, ::AST::AttributeList attrs, Ident name):
m_attrs( ::std::move(attrs) ),
m_span( ::std::move(sp) ),
m_name( ::std::move(name) )
{
}
LifetimeParam(LifetimeParam&&) = default;
LifetimeParam& operator=(LifetimeParam&&) = default;
explicit LifetimeParam(const LifetimeParam&) = default;
const ::AST::AttributeList& attrs() const { return m_attrs; }
const Span& span() const { return m_span; }
const Ident& name() const { return m_name; }
friend ::std::ostream& operator<<(::std::ostream& os, const LifetimeParam& p);
};
// HigherRankedBounds is defined in `types.hpp`
TAGGED_UNION_EX( GenericBound, (), None,
(
(None, struct{}),
// Lifetime bound: 'test must be valid for 'bound
(Lifetime, struct {
LifetimeRef test;
LifetimeRef bound;
}),
// Type lifetime bound
(TypeLifetime, struct {
TypeRef type;
LifetimeRef bound;
}),
// Standard trait bound: "Type: [for<'a>] Trait"
(IsTrait, struct {
HigherRankedBounds outer_hrbs;
TypeRef type;
HigherRankedBounds inner_hrbs;
AST::Path trait;
}),
// Removed trait bound: "Type: ?Trait"
(MaybeTrait, struct {
TypeRef type;
AST::Path trait;
}),
// Negative trait bound: "Type: !Trait"
(NotTrait, struct {
TypeRef type;
AST::Path trait;
}),
// Type equality: "Type = Replacement"
(Equality, struct {
TypeRef type;
TypeRef replacement;
})
),
(, span(x.span) ), ( span = x.span; ),
(
public:
Span span;
GenericBound clone() const {
TU_MATCH(GenericBound, ( (*this) ), (ent),
(None, return make_None({}); ),
(Lifetime, return make_Lifetime({ent.test, ent.bound}); ),
(TypeLifetime, return make_TypeLifetime({ent.type.clone(), ent.bound}); ),
(IsTrait, return make_IsTrait({ent.outer_hrbs, ent.type.clone(), ent.inner_hrbs, ent.trait}); ),
(MaybeTrait, return make_MaybeTrait({ent.type.clone(), ent.trait}); ),
(NotTrait, return make_NotTrait({ent.type.clone(), ent.trait}); ),
(Equality, return make_Equality({ent.type.clone(), ent.replacement.clone()}); )
)
return GenericBound();
}
)
);
::std::ostream& operator<<(::std::ostream& os, const GenericBound& x);
class GenericParams
{
::std::vector<TypeParam> m_type_params;
::std::vector<LifetimeParam> m_lifetime_params;
::std::vector<GenericBound> m_bounds;
public:
GenericParams() {}
GenericParams(GenericParams&& x) = default;
GenericParams& operator=(GenericParams&& x) = default;
GenericParams(const GenericParams& x) = delete;
GenericParams clone() const {
GenericParams rv;
rv.m_type_params = ::std::vector<TypeParam>( m_type_params ); // Copy-constructable
rv.m_lifetime_params = ::std::vector<LifetimeParam>(m_lifetime_params);
rv.m_bounds.reserve( m_bounds.size() );
for(auto& e: m_bounds)
rv.m_bounds.push_back( e.clone() );
return rv;
}
const ::std::vector<TypeParam>& ty_params() const { return m_type_params; }
::std::vector<TypeParam>& ty_params() { return m_type_params; }
const ::std::vector<LifetimeParam>& lft_params() const { return m_lifetime_params; }
const ::std::vector<GenericBound>& bounds() const { return m_bounds; }
::std::vector<GenericBound>& bounds() { return m_bounds; }
void add_ty_param(TypeParam param) { m_type_params.push_back( ::std::move(param) ); }
void add_lft_param(LifetimeParam lft) { m_lifetime_params.push_back( ::std::move(lft) ); }
void add_bound(GenericBound bound) {
m_bounds.push_back( ::std::move(bound) );
}
int find_name(const char* name) const;
bool check_params(Crate& crate, const ::std::vector<TypeRef>& types) const;
bool check_params(Crate& crate, ::std::vector<TypeRef>& types, bool allow_infer) const;
friend ::std::ostream& operator<<(::std::ostream& os, const GenericParams& tp);
};
}
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