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#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===- CXXFieldCollector.h - Utility class for C++ class semantic analysis ===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file provides CXXFieldCollector that is used during parsing & semantic
// analysis of C++ classes.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_SEMA_CXXFIELDCOLLECTOR_H
#define LLVM_CLANG_SEMA_CXXFIELDCOLLECTOR_H
#include "clang/Basic/LLVM.h"
#include "llvm/ADT/SmallVector.h"
namespace clang {
class FieldDecl;
/// CXXFieldCollector - Used to keep track of CXXFieldDecls during parsing of
/// C++ classes.
class CXXFieldCollector {
/// Fields - Contains all FieldDecls collected during parsing of a C++
/// class. When a nested class is entered, its fields are appended to the
/// fields of its parent class, when it is exited its fields are removed.
SmallVector<FieldDecl*, 32> Fields;
/// FieldCount - Each entry represents the number of fields collected during
/// the parsing of a C++ class. When a nested class is entered, a new field
/// count is pushed, when it is exited, the field count is popped.
SmallVector<size_t, 4> FieldCount;
// Example:
//
// class C {
// int x,y;
// class NC {
// int q;
// // At this point, Fields contains [x,y,q] decls and FieldCount contains
// // [2,1].
// };
// int z;
// // At this point, Fields contains [x,y,z] decls and FieldCount contains
// // [3].
// };
public:
/// StartClass - Called by Sema::ActOnStartCXXClassDef.
void StartClass() { FieldCount.push_back(0); }
/// Add - Called by Sema::ActOnCXXMemberDeclarator.
void Add(FieldDecl *D) {
Fields.push_back(D);
++FieldCount.back();
}
/// getCurNumField - The number of fields added to the currently parsed class.
size_t getCurNumFields() const {
assert(!FieldCount.empty() && "no currently-parsed class");
return FieldCount.back();
}
/// getCurFields - Pointer to array of fields added to the currently parsed
/// class.
FieldDecl **getCurFields() { return &*(Fields.end() - getCurNumFields()); }
/// FinishClass - Called by Sema::ActOnFinishCXXClassDef.
void FinishClass() {
Fields.resize(Fields.size() - getCurNumFields());
FieldCount.pop_back();
}
};
} // end namespace clang
#endif
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
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