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//===--------------------- TildeExpressionResolver.h ------------*- 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 LLDB_UTILITY_TILDE_EXPRESSION_RESOLVER_H
#define LLDB_UTILITY_TILDE_EXPRESSION_RESOLVER_H
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSet.h"
namespace llvm {
template <typename T> class SmallVectorImpl;
}
namespace lldb_private {
class TildeExpressionResolver {
public:
virtual ~TildeExpressionResolver();
/// Resolve a Tilde Expression contained according to bash rules.
///
/// \param Expr Contains the tilde expression to resolve. A valid tilde
/// expression must begin with a tilde and contain only non
/// separator characters.
///
/// \param Output Contains the resolved tilde expression, or the original
/// input if the tilde expression could not be resolved.
///
/// \returns true if \p Expr was successfully resolved, false otherwise.
virtual bool ResolveExact(llvm::StringRef Expr,
llvm::SmallVectorImpl<char> &Output) = 0;
/// Auto-complete a tilde expression with all matching values.
///
/// \param Expr Contains the tilde expression prefix to resolve. See
/// ResolveExact() for validity rules.
///
/// \param Output Contains all matching home directories, each one
/// itself unresolved (i.e. you need to call ResolveExact
/// on each item to turn it into a real path).
///
/// \returns true if there were any matches, false otherwise.
virtual bool ResolvePartial(llvm::StringRef Expr,
llvm::StringSet<> &Output) = 0;
/// Resolve an entire path that begins with a tilde expression, replacing
/// the username portion with the matched result.
bool ResolveFullPath(llvm::StringRef Expr,
llvm::SmallVectorImpl<char> &Output);
};
class StandardTildeExpressionResolver : public TildeExpressionResolver {
public:
bool ResolveExact(llvm::StringRef Expr,
llvm::SmallVectorImpl<char> &Output) override;
bool ResolvePartial(llvm::StringRef Expr, llvm::StringSet<> &Output) override;
};
}
#endif // #ifndef LLDB_UTILITY_TILDE_EXPRESSION_RESOLVER_H
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