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//===--- Query.h - clang-query ----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_QUERY_QUERY_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_QUERY_QUERY_H
#include <string>
#include "clang/ASTMatchers/Dynamic/VariantValue.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/Optional.h"
namespace clang {
namespace query {
enum OutputKind {
OK_Diag,
OK_Print,
OK_Dump
};
enum QueryKind {
QK_Invalid,
QK_NoOp,
QK_Help,
QK_Match,
QK_SetBool,
QK_SetOutputKind
};
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;
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 LLVM_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 LLVM_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 LLVM_OVERRIDE;
static bool classof(const Query *Q) { return Q->Kind == QK_Help; }
};
/// Query for "match MATCHER".
struct MatchQuery : Query {
MatchQuery(const ast_matchers::dynamic::DynTypedMatcher &Matcher)
: Query(QK_Match), Matcher(Matcher) {}
bool run(llvm::raw_ostream &OS, QuerySession &QS) const LLVM_OVERRIDE;
ast_matchers::dynamic::DynTypedMatcher Matcher;
static bool classof(const Query *Q) { return Q->Kind == QK_Match; }
};
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;
};
/// 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 LLVM_OVERRIDE {
QS.*Var = Value;
return true;
}
static bool classof(const Query *Q) {
return Q->Kind == SetQueryKind<T>::value;
}
T QuerySession::*Var;
T Value;
};
} // namespace query
} // namespace clang
#endif
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