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//===--- Query.h - clang-query ----------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_QUERY_QUERY_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_QUERY_QUERY_H
#include "QuerySession.h"
#include "clang/ASTMatchers/Dynamic/VariantValue.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/Optional.h"
#include <string>
namespace clang {
namespace query {
enum OutputKind { OK_Diag, OK_Print, OK_DetailedAST, OK_SrcLoc };
enum QueryKind {
QK_Invalid,
QK_NoOp,
QK_Help,
QK_Let,
QK_Match,
QK_SetBool,
QK_SetOutputKind,
QK_SetTraversalKind,
QK_EnableOutputKind,
QK_DisableOutputKind,
QK_Quit
};
class QuerySession;
struct Query : llvm::RefCountedBase<Query> {
Query(QueryKind Kind) : Kind(Kind) {}
virtual ~Query();
/// Perform the query on \p QS and print output to \p OS.
///
/// \return false if an error occurs, otherwise return true.
virtual bool run(llvm::raw_ostream &OS, QuerySession &QS) const = 0;
StringRef RemainingContent;
const QueryKind Kind;
};
typedef llvm::IntrusiveRefCntPtr<Query> QueryRef;
/// Any query which resulted in a parse error. The error message is in ErrStr.
struct InvalidQuery : Query {
InvalidQuery(const Twine &ErrStr) : Query(QK_Invalid), ErrStr(ErrStr.str()) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override;
std::string ErrStr;
static bool classof(const Query *Q) { return Q->Kind == QK_Invalid; }
};
/// No-op query (i.e. a blank line).
struct NoOpQuery : Query {
NoOpQuery() : Query(QK_NoOp) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override;
static bool classof(const Query *Q) { return Q->Kind == QK_NoOp; }
};
/// Query for "help".
struct HelpQuery : Query {
HelpQuery() : Query(QK_Help) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override;
static bool classof(const Query *Q) { return Q->Kind == QK_Help; }
};
/// Query for "quit".
struct QuitQuery : Query {
QuitQuery() : Query(QK_Quit) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override;
static bool classof(const Query *Q) { return Q->Kind == QK_Quit; }
};
/// Query for "match MATCHER".
struct MatchQuery : Query {
MatchQuery(StringRef Source,
const ast_matchers::dynamic::DynTypedMatcher &Matcher)
: Query(QK_Match), Matcher(Matcher), Source(Source) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override;
ast_matchers::dynamic::DynTypedMatcher Matcher;
StringRef Source;
static bool classof(const Query *Q) { return Q->Kind == QK_Match; }
};
struct LetQuery : Query {
LetQuery(StringRef Name, const ast_matchers::dynamic::VariantValue &Value)
: Query(QK_Let), Name(Name), Value(Value) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override;
std::string Name;
ast_matchers::dynamic::VariantValue Value;
static bool classof(const Query *Q) { return Q->Kind == QK_Let; }
};
template <typename T> struct SetQueryKind {};
template <> struct SetQueryKind<bool> {
static const QueryKind value = QK_SetBool;
};
template <> struct SetQueryKind<OutputKind> {
static const QueryKind value = QK_SetOutputKind;
};
template <> struct SetQueryKind<TraversalKind> {
static const QueryKind value = QK_SetTraversalKind;
};
/// Query for "set VAR VALUE".
template <typename T> struct SetQuery : Query {
SetQuery(T QuerySession::*Var, T Value)
: Query(SetQueryKind<T>::value), Var(Var), Value(Value) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override {
QS.*Var = Value;
return true;
}
static bool classof(const Query *Q) {
return Q->Kind == SetQueryKind<T>::value;
}
T QuerySession::*Var;
T Value;
};
// Implements the exclusive 'set output dump|diag|print' options.
struct SetExclusiveOutputQuery : Query {
SetExclusiveOutputQuery(bool QuerySession::*Var)
: Query(QK_SetOutputKind), Var(Var) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override {
QS.DiagOutput = false;
QS.DetailedASTOutput = false;
QS.PrintOutput = false;
QS.SrcLocOutput = false;
QS.*Var = true;
return true;
}
static bool classof(const Query *Q) { return Q->Kind == QK_SetOutputKind; }
bool QuerySession::*Var;
};
// Implements the non-exclusive 'set output dump|diag|print' options.
struct SetNonExclusiveOutputQuery : Query {
SetNonExclusiveOutputQuery(QueryKind Kind, bool QuerySession::*Var,
bool Value)
: Query(Kind), Var(Var), Value(Value) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const override {
QS.*Var = Value;
return true;
}
bool QuerySession::*Var;
bool Value;
};
struct EnableOutputQuery : SetNonExclusiveOutputQuery {
EnableOutputQuery(bool QuerySession::*Var)
: SetNonExclusiveOutputQuery(QK_EnableOutputKind, Var, true) {}
static bool classof(const Query *Q) { return Q->Kind == QK_EnableOutputKind; }
};
struct DisableOutputQuery : SetNonExclusiveOutputQuery {
DisableOutputQuery(bool QuerySession::*Var)
: SetNonExclusiveOutputQuery(QK_DisableOutputKind, Var, false) {}
static bool classof(const Query *Q) {
return Q->Kind == QK_DisableOutputKind;
}
};
} // namespace query
} // namespace clang
#endif
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