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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andres Noetzli, Morgan Deters, Aina Niemetz |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Some standard STL-related utility functions for cvc5. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__UTILITY_H |
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#define CVC5__UTILITY_H |
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#include <algorithm> |
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#include <fstream> |
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#include <memory> |
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#include <optional> |
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#include <string> |
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namespace cvc5 { |
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/** |
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* Using std::find_if(), finds the first iterator in [first,last) |
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* range that satisfies predicate. If none, return last; otherwise, |
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* search for a second one. If there IS a second one, return last, |
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* otherwise return the first (and unique) iterator satisfying pred(). |
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*/ |
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template <class InputIterator, class Predicate> |
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inline InputIterator find_if_unique(InputIterator first, InputIterator last, Predicate pred) { |
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InputIterator match = std::find_if(first, last, pred); |
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if(match == last) { |
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return last; |
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} |
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InputIterator match2 = match; |
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match2 = std::find_if(++match2, last, pred); |
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return (match2 == last) ? match : last; |
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} |
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template <typename T> |
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void container_to_stream(std::ostream& out, |
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const T& container, |
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const char* prefix = "[", |
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const char* postfix = "]", |
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const char* sep = ", ") |
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{ |
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out << prefix; |
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bool is_first = true; |
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for (const auto& item : container) |
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{ |
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out << (!is_first ? sep : "") << item; |
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is_first = false; |
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} |
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out << postfix; |
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} |
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/** |
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* Generates a string representation of std::optional and inserts it into a |
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* stream. |
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* |
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* @param out The stream |
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* @param m The value |
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* @return The stream |
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*/ |
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template <class T> |
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std::ostream& operator<<(std::ostream& out, const std::optional<T>& m) |
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{ |
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out << "{"; |
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if (m) |
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{ |
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out << "Just "; |
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out << *m; |
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} |
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else |
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{ |
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out << "Nothing"; |
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} |
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out << "}"; |
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return out; |
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} |
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/** |
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* Opens a new temporary file with a given filename pattern and returns an |
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* fstream to it. The directory that the file is created in is either TMPDIR or |
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* /tmp/ if TMPDIR is not set. |
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* |
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* @param pattern The filename pattern. This string is modified to contain the |
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* name of the temporary file. |
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* |
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* @return A unique pointer to the filestream for the temporary file. |
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* |
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* Note: We use `std::unique_ptr<std::fstream>` instead of `std::fstream` |
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* because GCC < 5 does not support the move constructor of `std::fstream`. See |
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* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54316 for details. |
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*/ |
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std::unique_ptr<std::fstream> openTmpFile(std::string* pattern); |
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} // namespace cvc5 |
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#endif /* CVC5__UTILITY_H */ |