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/*
* Build up a name index in all modules (optimising lookups in later stages)
*/
#include <ast/ast.hpp>
#include <ast/crate.hpp>
#include <main_bindings.hpp>
enum class IndexName
{
Namespace,
Type,
Value,
};
::std::ostream& operator<<(::std::ostream& os, const IndexName& loc)
{
switch(loc)
{
case IndexName::Namespace:
return os << "namespace";
case IndexName::Type:
return os << "type";
case IndexName::Value:
return os << "value";
}
throw "";
}
::std::unordered_map< ::std::string, ::AST::Module::IndexEnt >& get_mod_index(::AST::Module& mod, IndexName location) {
switch(location)
{
case IndexName::Namespace:
return mod.m_namespace_items;
case IndexName::Type:
return mod.m_type_items;
case IndexName::Value:
return mod.m_value_items;
}
throw "";
}
void _add_item(AST::Module& mod, IndexName location, const ::std::string& name, bool is_pub, ::AST::Path ir, bool error_on_collision=true)
{
DEBUG("Add " << location << " item '" << name << "': " << ir);
auto& list = get_mod_index(mod, location);
bool was_import = (ir != mod.path() + name);
if( false == list.insert(::std::make_pair(name, ::AST::Module::IndexEnt { is_pub, was_import, mv$(ir) } )).second )
{
if( error_on_collision )
{
ERROR(Span(), E0000, "Duplicate definition of name '" << name << "' in " << location << " scope (" << mod.path() << ")");
}
else
{
DEBUG("Name collision " << mod.path() << ", ignored");
}
}
}
void _add_item_type(AST::Module& mod, const ::std::string& name, bool is_pub, ::AST::Path ir, bool error_on_collision=true)
{
_add_item(mod, IndexName::Namespace, name, is_pub, ::AST::Path(ir), error_on_collision);
_add_item(mod, IndexName::Type, name, is_pub, mv$(ir), error_on_collision);
}
void _add_item_value(AST::Module& mod, const ::std::string& name, bool is_pub, ::AST::Path ir, bool error_on_collision=true)
{
_add_item(mod, IndexName::Value, name, is_pub, mv$(ir), error_on_collision);
}
void Resolve_Index_Module_Base(AST::Module& mod)
{
TRACE_FUNCTION_F("mod = " << mod.path());
for( const auto& i : mod.items() )
{
::AST::Path p = mod.path() + i.name;
DEBUG("- p = " << p << " : " << ::AST::Item::tag_to_str(i.data.tag()));
TU_MATCH(AST::Item, (i.data), (e),
(None,
),
// - Types/modules only
(Module,
p.bind( ::AST::PathBinding::make_Module({&e}) );
_add_item(mod, IndexName::Namespace, i.name, i.is_pub, mv$(p));
),
(Crate,
TODO(Span(), "Crate in Resolve_Index_Module");
//p.bind( ::AST::PathBinding::make_Crate(e) );
//_add_item(mod, IndexName::Namespace, i.name, i.is_pub, mv$(p));
),
(Enum,
p.bind( ::AST::PathBinding::make_Enum({&e}) );
_add_item_type(mod, i.name, i.is_pub, mv$(p));
),
(Trait,
p.bind( ::AST::PathBinding::make_Trait({&e}) );
_add_item_type(mod, i.name, i.is_pub, mv$(p));
),
(Type,
p.bind( ::AST::PathBinding::make_TypeAlias({&e}) );
_add_item_type(mod, i.name, i.is_pub, mv$(p));
),
// - Mixed
(Struct,
p.bind( ::AST::PathBinding::make_Struct({&e}) );
// - If the struct is a tuple-like struct (or unit-like), it presents in the value namespace
if( e.m_data.is_Tuple() ) {
_add_item_value(mod, i.name, i.is_pub, p);
}
_add_item_type(mod, i.name, i.is_pub, mv$(p));
),
// - Values only
(Function,
p.bind( ::AST::PathBinding::make_Function({&e}) );
_add_item_value(mod, i.name, i.is_pub, mv$(p));
),
(Static,
p.bind( ::AST::PathBinding::make_Static({&e}) );
_add_item_value(mod, i.name, i.is_pub, mv$(p));
)
)
}
bool has_pub_wildcard = false;
// Named imports
for( const auto& i : mod.imports() )
{
if( i.name != "" )
{
const auto& sp = i.data.sp;
const auto& b = i.data.path.binding();
TU_MATCH(::AST::PathBinding, (b), (e),
(Unbound,
BUG(sp, "Import left unbound ("<<i.data.path<<")");
),
(Variable,
BUG(sp, "Import was bound to variable");
),
(TypeParameter,
BUG(sp, "Import was bound to type parameter");
),
(TraitMethod,
BUG(sp, "Import was bound to trait method");
),
(StructMethod,
BUG(sp, "Import was bound to struct method");
),
(Module, _add_item(mod, IndexName::Namespace, i.name, i.is_pub, i.data.path); ),
//(Crate, _add_item_type(mod, IndexName::Namespace, i.name, i.is_pub, i.data.path); ),
(Enum, _add_item_type(mod, i.name, i.is_pub, i.data.path); ),
(Trait, _add_item_type(mod, i.name, i.is_pub, i.data.path); ),
(TypeAlias, _add_item_type(mod, i.name, i.is_pub, i.data.path); ),
(Struct,
_add_item_type(mod, i.name, i.is_pub, i.data.path);
// - If the struct is a tuple-like struct, it presents in the value namespace
if( e.struct_->m_data.is_Tuple() ) {
_add_item_value(mod, i.name, i.is_pub, i.data.path);
}
),
(Static , _add_item_value(mod, i.name, i.is_pub, i.data.path); ),
(Function, _add_item_value(mod, i.name, i.is_pub, i.data.path); ),
(EnumVar , _add_item_value(mod, i.name, i.is_pub, i.data.path); )
)
}
else
{
if( i.is_pub )
{
has_pub_wildcard = true;
}
}
}
mod.m_index_populated = (has_pub_wildcard ? 1 : 2);
// Handle child modules
for( auto& i : mod.items() )
{
TU_MATCH_DEF(AST::Item, (i.data), (e),
(
),
(Module,
Resolve_Index_Module_Base(e);
)
)
}
for(auto& mp : mod.anon_mods())
{
Resolve_Index_Module_Base(*mp);
}
}
void Resolve_Index_Module_Wildcard(AST::Module& mod, bool handle_pub)
{
TRACE_FUNCTION_F("mod = " << mod.path());
// Glob/wildcard imports
for( const auto& i : mod.imports() )
{
if( i.name == "" && i.is_pub == handle_pub )
{
const auto& sp = i.data.sp;
const auto& b = i.data.path.binding();
TU_MATCH_DEF(::AST::PathBinding, (b), (e),
(
BUG(sp, "Glob import of invalid type encountered");
),
(Unbound,
BUG(sp, "Import left unbound ("<<i.data.path<<")");
),
(Variable,
BUG(sp, "Import was bound to variable");
),
(TypeParameter,
BUG(sp, "Import was bound to type parameter");
),
(TraitMethod,
BUG(sp, "Import was bound to trait method");
),
(StructMethod,
BUG(sp, "Import was bound to struct method");
),
(Module,
if( e.module_ == &mod ) {
ERROR(sp, E0000, "Glob import of self");
}
// 1. Begin indexing of this module if it is not already indexed
if( e.module_->m_index_populated == 1 )
{
// TODO: Handle wildcard import of a module with a public wildcard import
TODO(sp, "Handle wildcard import of module with a wildcard (" << e.module_->path() << " by " << mod.path() << ")");
//Resolve_Index_Module( *e.module_ );
}
for(const auto& vi : e.module_->m_type_items) {
if( vi.second.is_pub ) {
_add_item_type( mod, vi.first, i.is_pub, vi.second.path, false );
}
}
for(const auto& vi : e.module_->m_value_items) {
if( vi.second.is_pub ) {
_add_item_value( mod, vi.first, i.is_pub, vi.second.path, false );
}
}
),
(Enum,
unsigned int idx = 0;
for( const auto& ev : e.enum_->variants() ) {
::AST::Path p = mod.path() + ev.m_name;
p.bind( ::AST::PathBinding::make_EnumVar({e.enum_, idx}) );
if( ev.m_data.is_Struct() ) {
_add_item_type ( mod, ev.m_name, i.is_pub, mv$(p), false );
}
else {
_add_item_value( mod, ev.m_name, i.is_pub, mv$(p), false );
}
idx += 1;
}
)
)
}
}
// handle_pub == true first, leading to full resoltion no matter what
mod.m_index_populated = 2;
// Handle child modules
for( auto& i : mod.items() )
{
TU_MATCH_DEF(AST::Item, (i.data), (e),
(
),
(Module,
Resolve_Index_Module_Wildcard(e, handle_pub);
)
)
}
for(auto& mp : mod.anon_mods())
{
Resolve_Index_Module_Wildcard(*mp, handle_pub);
}
}
void Resolve_Index(AST::Crate& crate)
{
Resolve_Index_Module_Base(crate.m_root_module);
Resolve_Index_Module_Wildcard(crate.m_root_module, true);
Resolve_Index_Module_Wildcard(crate.m_root_module, false);
}
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