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// Copyright (C) 2020-2025 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#ifndef RUST_EARLY_NAME_RESOLVER_H
#define RUST_EARLY_NAME_RESOLVER_H
#include "rust-name-resolver.h"
#include "rust-system.h"
#include "rust-ast.h"
#include "rust-ast-visitor.h"
namespace Rust {
namespace Resolver {
class EarlyNameResolver : public AST::DefaultASTVisitor
{
public:
EarlyNameResolver ();
void go (AST::Crate &crate);
private:
using AST::DefaultASTVisitor::visit;
/**
* Execute a lambda within a scope. This is equivalent to calling
* `enter_scope` before your code and `exit_scope` after. This ensures
* no errors can be committed
*/
void scoped (NodeId scope_id, std::function<void ()> fn)
{
auto old_scope = current_scope;
current_scope = scope_id;
resolver.get_macro_scope ().push (scope_id);
resolver.push_new_macro_rib (resolver.get_macro_scope ().peek ());
fn ();
resolver.get_macro_scope ().pop ();
current_scope = old_scope;
}
/**
* Accumulate all of the nested macros which escape their module through the
* use of the #[macro_use] attribute.
*
* This function recursively accumulates macros in all of the nested modules
* of an item container (an AST::Crate or an AST::Module) and returns this new
* list of items. You can then use the `take_items` and `set_items` functions
* on these containers to replace their list of items.
*/
std::vector<std::unique_ptr<AST::Item>>
accumulate_escaped_macros (AST::Module &module);
/**
* The "scope" we are currently in.
*
* This involves lexical scopes:
*
* ```rust
* // current_scope = crate_id;
* macro_rules! foo { () => {} )
*
* {
* // current_scope = current_block_id;
* macro_rules! foo { () => { something!(); } }
* }
* // current_scope = crate_id;
* ```
*
* as well as any sort of scope-like structure that might impact import name
* resolution or macro name resolution:
*
* ```rust
* macro_rules! foo {
* () => { fn empty() {} }
* }
*
*
* trait Foo {
* fn foo() {
* fn inner_foo() {
* macro_rules! foo { () => {} )
*
* foo!();
* }
*
* foo!();
* }
*
* foo!();
* }
*
* foo!();
* ```
*/
NodeId current_scope;
/* The crate's scope */
NodeId crate_scope;
Resolver &resolver;
Analysis::Mappings &mappings;
/**
* Early name-resolve generic args, which can be macro invocations
*/
void resolve_generic_args (AST::GenericArgs &generic_args);
/**
* Early name-resolve a qualified path type, which can contain macro
* invocations
*/
void resolve_qualified_path_type (AST::QualifiedPathType &path);
virtual void visit (AST::Crate &crate);
virtual void visit (AST::DelimTokenTree &delim_tok_tree);
virtual void visit (AST::AttrInputMetaItemContainer &input);
virtual void visit (AST::IdentifierExpr &ident_expr);
virtual void visit (AST::LifetimeParam &lifetime_param);
virtual void visit (AST::ConstGenericParam &const_param);
virtual void visit (AST::PathInExpression &path);
virtual void visit (AST::TypePathSegmentGeneric &segment);
virtual void visit (AST::QualifiedPathInExpression &path);
virtual void visit (AST::QualifiedPathInType &path);
virtual void visit (AST::LiteralExpr &expr);
virtual void visit (AST::AttrInputLiteral &attr_input);
virtual void visit (AST::AttrInputMacro &attr_input);
virtual void visit (AST::MetaItemLitExpr &meta_item);
virtual void visit (AST::MetaItemPathLit &meta_item);
virtual void visit (AST::StructExprStruct &expr);
virtual void visit (AST::StructExprFieldIdentifier &field);
virtual void visit (AST::StructExprStructBase &expr);
virtual void visit (AST::BlockExpr &expr);
virtual void visit (AST::ContinueExpr &expr);
virtual void visit (AST::RangeFullExpr &expr);
virtual void visit (AST::ForLoopExpr &expr);
virtual void visit (AST::IfLetExpr &expr);
virtual void visit (AST::MatchExpr &expr);
virtual void visit (AST::LifetimeWhereClauseItem &item);
virtual void visit (AST::Module &module);
virtual void visit (AST::ExternCrate &crate);
virtual void visit (AST::UseTreeGlob &use_tree);
virtual void visit (AST::UseTreeList &use_tree);
virtual void visit (AST::UseTreeRebind &use_tree);
virtual void visit (AST::UseDeclaration &use_decl);
virtual void visit (AST::EnumItem &item);
virtual void visit (AST::Union &union_item);
virtual void visit (AST::TraitItemType &item);
virtual void visit (AST::Trait &trait);
virtual void visit (AST::InherentImpl &impl);
virtual void visit (AST::TraitImpl &impl);
virtual void visit (AST::ExternalTypeItem &item);
virtual void visit (AST::ExternBlock &block);
virtual void visit (AST::MacroMatchRepetition &match);
virtual void visit (AST::MacroMatcher &matcher);
virtual void visit (AST::MacroRulesDefinition &rules_def);
virtual void visit (AST::MacroInvocation ¯o_invoc);
virtual void visit (AST::MetaItemPath &meta_item);
virtual void visit (AST::MetaItemSeq &meta_item);
virtual void visit (AST::MetaNameValueStr &meta_item);
virtual void visit (AST::MetaListPaths &meta_item);
virtual void visit (AST::MetaListNameValueStr &meta_item);
virtual void visit (AST::RangePatternBoundLiteral &bound);
virtual void visit (AST::RangePatternBoundPath &bound);
virtual void visit (AST::RangePatternBoundQualPath &bound);
virtual void visit (AST::StructPatternFieldIdent &field);
virtual void visit (AST::StructPattern &pattern);
virtual void visit (AST::TupleStructPattern &pattern);
virtual void visit (AST::TraitBound &bound);
virtual void visit (AST::ImplTraitType &type);
virtual void visit (AST::TraitObjectType &type);
virtual void visit (AST::ParenthesisedType &type);
virtual void visit (AST::ImplTraitTypeOneBound &type);
virtual void visit (AST::TraitObjectTypeOneBound &type);
virtual void visit (AST::TupleType &type);
virtual void visit (AST::RawPointerType &type);
virtual void visit (AST::ReferenceType &type);
virtual void visit (AST::ArrayType &type);
virtual void visit (AST::SliceType &type);
virtual void visit (AST::InferredType &type);
};
} // namespace Resolver
} // namespace Rust
#endif // RUST_EARLY_NAME_RESOLVER_H
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