This is the main "parser", a helper function to the above tokenizer. NOTE: this modifies (possibly) the tokens list, therefore, we pass in a copy of the parsers tokens here, such that the original token list is retained (useful for tests etc.).
| 154 | // This is the main "parser", a helper function to the above tokenizer. NOTE: this modifies (possibly) the tokens list, |
| 155 | // therefore, we pass in a copy of the parsers tokens here, such that the original token list is retained (useful for tests etc.). |
| 156 | bool |
| 157 | Parser::preprocess(std::vector<std::string> tokens) |
| 158 | { |
| 159 | // The last token might be the "flags" section, lets consume it if it is |
| 160 | if (tokens.size() > 0) { |
| 161 | std::string m = tokens[tokens.size() - 1]; |
| 162 | |
| 163 | if (!m.empty() && (m[0] == '[')) { |
| 164 | if (m[m.size() - 1] == ']') { |
| 165 | m = m.substr(1, m.size() - 2); |
| 166 | if (m.find_first_of(',') != std::string::npos) { |
| 167 | std::istringstream iss(m); |
| 168 | std::string t; |
| 169 | while (getline(iss, t, ',')) { |
| 170 | _mods.push_back(t); |
| 171 | } |
| 172 | } else { |
| 173 | _mods.push_back(m); |
| 174 | } |
| 175 | tokens.pop_back(); // consume it, so we don't concatenate it into the value |
| 176 | } else { |
| 177 | // Syntax error |
| 178 | TSError("[%s] mods have to be enclosed in []", PLUGIN_NAME); |
| 179 | return false; |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | // Special case for "conditional" values |
| 185 | if (tokens[0].substr(0, 2) == "%{") { |
| 186 | _cond = true; |
| 187 | } else if (tokens[0] == "cond") { |
| 188 | _cond = true; |
| 189 | tokens.erase(tokens.begin()); |
| 190 | } else if (tokens[0] == "else") { |
| 191 | _cond = false; |
| 192 | _else = true; |
| 193 | |
| 194 | return true; |
| 195 | } |
| 196 | |
| 197 | // Is it a condition or operator? |
| 198 | if (_cond) { |
| 199 | if ((tokens[0].substr(0, 2) == "%{") && (tokens[0][tokens[0].size() - 1] == '}')) { |
| 200 | _op = tokens[0].substr(2, tokens[0].size() - 3); |
| 201 | if (tokens.size() > 2 && (tokens[1][0] == '=' || tokens[1][0] == '>' || tokens[1][0] == '<')) { |
| 202 | // cond + [=<>] + argument |
| 203 | _arg = tokens[1] + tokens[2]; |
| 204 | } else if (tokens.size() > 1) { |
| 205 | // This is for the regular expression, which for some reason has its own handling?? ToDo: Why ? |
| 206 | _arg = tokens[1]; |
| 207 | } else { |
| 208 | // This would be for hook conditions, which has no argument. |
| 209 | _arg = ""; |
| 210 | } |
| 211 | } else { |
| 212 | TSError("[%s] conditions must be embraced in %%{}", PLUGIN_NAME); |
| 213 | return false; |