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//===--- IncrementalParser.h - Incremental Compilation ----------*- C++ -*-===//
//
// 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 implements the class which performs incremental code compilation.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_INTERPRETER_INCREMENTALPARSER_H
#define LLVM_CLANG_LIB_INTERPRETER_INCREMENTALPARSER_H
#include "clang/Interpreter/PartialTranslationUnit.h"
#include "clang/AST/GlobalDecl.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Error.h"
#include <list>
#include <memory>
namespace llvm {
class LLVMContext;
}
namespace clang {
class ASTConsumer;
class CompilerInstance;
class IncrementalAction;
class Parser;
/// Provides support for incremental compilation. Keeps track of the state
/// changes between the subsequent incremental input.
///
class IncrementalParser {
/// Long-lived, incremental parsing action.
std::unique_ptr<IncrementalAction> Act;
/// Compiler instance performing the incremental compilation.
std::unique_ptr<CompilerInstance> CI;
/// Parser.
std::unique_ptr<Parser> P;
/// Consumer to process the produced top level decls. Owned by Act.
ASTConsumer *Consumer = nullptr;
/// Counts the number of direct user input lines that have been parsed.
unsigned InputCount = 0;
/// List containing every information about every incrementally parsed piece
/// of code.
std::list<PartialTranslationUnit> PTUs;
public:
IncrementalParser(std::unique_ptr<CompilerInstance> Instance,
llvm::LLVMContext &LLVMCtx, llvm::Error &Err);
~IncrementalParser();
const CompilerInstance *getCI() const { return CI.get(); }
/// Parses incremental input by creating an in-memory file.
///\returns a \c PartialTranslationUnit which holds information about the
/// \c TranslationUnitDecl and \c llvm::Module corresponding to the input.
llvm::Expected<PartialTranslationUnit &> Parse(llvm::StringRef Input);
/// Uses the CodeGenModule mangled name cache and avoids recomputing.
///\returns the mangled name of a \c GD.
llvm::StringRef GetMangledName(GlobalDecl GD) const;
private:
llvm::Expected<PartialTranslationUnit &> ParseOrWrapTopLevelDecl();
};
} // end namespace clang
#endif // LLVM_CLANG_LIB_INTERPRETER_INCREMENTALPARSER_H
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