catch2/include/internal/catch_message.cpp

/*
 *  Created by Phil Nash on 1/2/2013.
 *  Copyright 2013 Two Blue Cubes Ltd. All rights reserved.
 *
 *  Distributed under the Boost Software License, Version 1.0. (See accompanying
 *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 */

#include "catch_message.h"
#include "catch_interfaces_capture.h"
#include "catch_uncaught_exceptions.h"
#include "catch_enforce.h"

#include <cassert>
#include <stack>

namespace Catch {

    MessageInfo::MessageInfo(   StringRef const& _macroName,
                                SourceLineInfo const& _lineInfo,
                                ResultWas::OfType _type )
    :   macroName( _macroName ),
        lineInfo( _lineInfo ),
        type( _type ),
        sequence( ++globalCount )
    {}

    bool MessageInfo::operator==( MessageInfo const& other ) const {
        return sequence == other.sequence;
    }

    bool MessageInfo::operator<( MessageInfo const& other ) const {
        return sequence < other.sequence;
    }

    // This may need protecting if threading support is added
    unsigned int MessageInfo::globalCount = 0;


    ////////////////////////////////////////////////////////////////////////////

    Catch::MessageBuilder::MessageBuilder( StringRef const& macroName,
                                           SourceLineInfo const& lineInfo,
                                           ResultWas::OfType type )
        :m_info(macroName, lineInfo, type) {}

    ////////////////////////////////////////////////////////////////////////////


    ScopedMessage::ScopedMessage( MessageBuilder const& builder )
    : m_info( builder.m_info ), m_moved()
    {
        m_info.message = builder.m_stream.str();
        getResultCapture().pushScopedMessage( m_info );
    }

    ScopedMessage::ScopedMessage( ScopedMessage&& old )
    : m_info( old.m_info ), m_moved()
    {
        old.m_moved = true;
    }

    ScopedMessage::~ScopedMessage() {
        if ( !uncaught_exceptions() && !m_moved ){
            getResultCapture().popScopedMessage(m_info);
        }
    }


    Capturer::Capturer( StringRef macroName, SourceLineInfo const& lineInfo, ResultWas::OfType resultType, StringRef names ) {
        auto trimmed = [&] (size_t start, size_t end) {
            while (names[start] == ',' || isspace(names[start])) {
                ++start;
            }
            while (names[end] == ',' || isspace(names[end])) {
                --end;
            }
            return names.substr(start, end - start + 1);
        };
        auto skipq = [&] (size_t start, char quote) {
            for (auto i = start + 1; i < names.size() ; ++i) {
                if (names[i] == quote)
                    return i;
                if (names[i] == '\\')
                    ++i;
            }
            CATCH_INTERNAL_ERROR("CAPTURE parsing encountered unmatched quote");
        };

        size_t start = 0;
        std::stack<char> openings;
        for (size_t pos = 0; pos < names.size(); ++pos) {
            char c = names[pos];
            switch (c) {
            case '[':
            case '{':
            case '(':
            // It is basically impossible to disambiguate between
            // comparison and start of template args in this context
//            case '<':
                openings.push(c);
                break;
            case ']':
            case '}':
            case ')':
//           case '>':
                openings.pop();
                break;
            case '"':
            case '\'':
                pos = skipq(pos, c);
                break;
            case ',':
                if (start != pos && openings.empty()) {
                    m_messages.emplace_back(macroName, lineInfo, resultType);
                    m_messages.back().message = static_cast<std::string>(trimmed(start, pos));
                    m_messages.back().message += " := ";
                    start = pos;
                }
            }
        }
        assert(openings.empty() && "Mismatched openings");
        m_messages.emplace_back(macroName, lineInfo, resultType);
        m_messages.back().message = static_cast<std::string>(trimmed(start, names.size() - 1));
        m_messages.back().message += " := ";
    }
    Capturer::~Capturer() {
        if ( !uncaught_exceptions() ){
            assert( m_captured == m_messages.size() );
            for( size_t i = 0; i < m_captured; ++i  )
                m_resultCapture.popScopedMessage( m_messages[i] );
        }
    }

    void Capturer::captureValue( size_t index, std::string const& value ) {
        assert( index < m_messages.size() );
        m_messages[index].message += value;
        m_resultCapture.pushScopedMessage( m_messages[index] );
        m_captured++;
    }

} // end namespace Catch