| 125 | } |
| 126 | |
| 127 | Token Lexer::parseToken() |
| 128 | { |
| 129 | Token token; |
| 130 | |
| 131 | bool inString = true; |
| 132 | bool inEscape = false; |
| 133 | bool inQuotes = false; |
| 134 | |
| 135 | for ( ;!m_Eof && inString && !std::isspace(m_Next); advance()) |
| 136 | { |
| 137 | if (inEscape) |
| 138 | { |
| 139 | token.value.push_back(m_Next); |
| 140 | inEscape = false; |
| 141 | } |
| 142 | else |
| 143 | { |
| 144 | switch (m_Next) |
| 145 | { |
| 146 | case '\\': inEscape = true; break; |
| 147 | case '\'': |
| 148 | case '\"': inString = inQuotes = !inQuotes; break; |
| 149 | default: |
| 150 | token.value.push_back(m_Next); |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | if (!m_Eof && !std::isspace(m_Next)) |
| 156 | m_Error = Error::UNEXPECTED_STRING_ENDING; |
| 157 | if (inEscape) |
| 158 | m_Error = Error::MISSING_ESCAPED_CHARACTER; |
| 159 | if (inQuotes) |
| 160 | m_Error = Error::MISSING_QUOTE_ENDING; |
| 161 | |
| 162 | if (m_Error == Error::NONE) |
| 163 | { |
| 164 | token.type = TokenType::STRING; |
| 165 | parseSpace(); |
| 166 | return token; |
| 167 | } |
| 168 | return Token(); |
| 169 | } |
| 170 | |
| 171 | // |
| 172 | // Interpreter implementation |