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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* hir/item-path.hpp
* - Printable path to an item in the HIR
*/
#pragma once
namespace HIR {
class ItemPath
{
public:
const ItemPath* parent = nullptr;
const ::HIR::TypeRef* ty = nullptr;
const ::HIR::SimplePath* trait = nullptr;
const ::HIR::PathParams* trait_params = nullptr;
const char* name = nullptr;
const char* crate_name = nullptr;
const ::HIR::Path* wrapped = nullptr;
ItemPath(const char* crate): crate_name(crate) {}
ItemPath(const ::std::string& crate): crate_name(crate.c_str()) {}
ItemPath(const RcString& crate): crate_name(crate.c_str()) {}
ItemPath(const ItemPath& p, const char* n):
parent(&p),
name(n)
{}
ItemPath(const ::HIR::Path& p):
wrapped(&p)
{
}
ItemPath(const ::HIR::TypeRef& type):
ty(&type)
{}
ItemPath(const ::HIR::TypeRef& type, const ::HIR::SimplePath& path, const ::HIR::PathParams& params):
ty(&type),
trait(&path),
trait_params(¶ms)
{}
ItemPath(const ::HIR::SimplePath& path):
trait(&path)
{}
const ::HIR::SimplePath* trait_path() const { return trait; }
const ::HIR::PathParams* trait_args() const { return trait_params; }
::HIR::SimplePath get_simple_path() const {
if( wrapped ) {
assert(wrapped->m_data.is_Generic());
return wrapped->m_data.as_Generic().m_path;
}
else if( trait && !name ) {
return trait->clone();
}
else if( parent ) {
assert(name);
return parent->get_simple_path() + RcString::new_interned(name);
}
else {
assert(!name);
assert(crate_name);
return ::HIR::SimplePath(RcString::new_interned(crate_name));
}
}
::HIR::Path get_full_path() const {
if( wrapped ) {
return wrapped->clone();
}
assert(parent);
assert(name);
// If the parent has a name, or the parent is the crate root.
if( parent->name || !parent->ty ) {
return get_simple_path();
}
else if( parent->trait ) {
assert(parent->ty);
assert(parent->trait_params);
return ::HIR::Path( parent->ty->clone(), ::HIR::GenericPath(parent->trait->clone(), parent->trait_params->clone()), RcString::new_interned(name) );
}
else {
assert(parent->ty);
return ::HIR::Path( parent->ty->clone(), RcString::new_interned(name) );
}
}
const char* get_name() const {
return name ? name : "";
}
const ItemPath& get_top_ip() const {
if( this->parent )
return this->parent->get_top_ip();
return *this;
}
ItemPath operator+(const ::std::string& name) const {
return ItemPath(*this, name.c_str());
}
ItemPath operator+(const RcString& name) const {
return ItemPath(*this, name.c_str());
}
bool operator==(const ::HIR::SimplePath& sp) const {
if( sp.m_crate_name != "" ) return false;
unsigned int i = sp.m_components.size();
const auto* n = this;
while( n && i -- )
{
if( !n->name )
return false;
if( n->name != sp.m_components[i] )
return false;
n = n->parent;
}
if( i > 0 || n->name )
return false;
return true;
}
friend ::std::ostream& operator<<(::std::ostream& os, const ItemPath& x) {
if( x.wrapped ) {
return os << *x.wrapped;
}
if( x.parent ) {
os << *x.parent;
}
if( x.name ) {
os << "::" << x.name;
}
else if( x.ty ) {
os << "<" << *x.ty;
if( x.trait ) {
os << " as " << *x.trait;
if( x.trait_params ) {
os << *x.trait_params;
}
}
os << ">";
}
else if( x.trait ) {
os << "<* as " << *x.trait << ">";
}
else if( x.crate_name ) {
os << "::\"" << x.crate_name << "\"";
}
return os;
}
};
}
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