swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 1 | #include "Parser.h" |
| 2 | |
| 3 | #include <QDebug> |
| 4 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 5 | ParseResult::ParseResult(bool okay) |
| 6 | : ParseResult((int)okay) |
| 7 | {} |
| 8 | |
| 9 | ParseResult::ParseResult(int status, ParsePos pos) |
| 10 | : ParseResult(status, "", pos) |
| 11 | {} |
| 12 | |
| 13 | ParseResult::ParseResult(int status, QString message, ParsePos pos) |
| 14 | { |
| 15 | _status = status; |
| 16 | _message = message; |
| 17 | _pos = pos; |
| 18 | } |
| 19 | |
| 20 | ParseResult::operator bool() const |
| 21 | { |
| 22 | return _status == COMPLETE; |
| 23 | } |
| 24 | |
| 25 | ParsePos ParseResult::pos() const |
| 26 | { |
| 27 | return _pos; |
| 28 | } |
| 29 | |
| 30 | QString ParseResult::message() const |
| 31 | { |
| 32 | return _message; |
| 33 | } |
| 34 | |
| 35 | int ParseResult::status() const |
| 36 | { |
| 37 | return _status; |
| 38 | } |
| 39 | |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 40 | Parser::Parser(QString input) |
| 41 | { |
| 42 | _input = input; |
| 43 | } |
| 44 | |
| 45 | QChar Parser::peek() |
| 46 | { |
| 47 | if (atEnd()) |
| 48 | return 0; |
| 49 | |
| 50 | return _input[_pos]; |
| 51 | } |
| 52 | |
| 53 | QChar Parser::get() |
| 54 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 55 | QChar c = _input[_pos++]; |
| 56 | |
| 57 | if (c == '\n') |
| 58 | { |
| 59 | _line++; |
| 60 | _offset = 0; |
| 61 | } |
| 62 | else |
| 63 | { |
| 64 | _offset++; |
| 65 | } |
| 66 | |
| 67 | return c; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | bool Parser::atEnd() |
| 71 | { |
| 72 | return _pos >= _input.length(); |
| 73 | } |
| 74 | |
| 75 | void Parser::skip() |
| 76 | { |
| 77 | while (peek().isSpace()) |
| 78 | get(); |
| 79 | } |
| 80 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 81 | ParsePos Parser::save() const |
| 82 | { |
| 83 | return ParsePos{_line, _pos, _offset}; |
| 84 | } |
| 85 | |
| 86 | void Parser::reset(ParsePos pos) |
| 87 | { |
| 88 | _line = pos.line; |
| 89 | _pos = pos.pos; |
| 90 | _offset = pos.lineOffset; |
| 91 | } |
| 92 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 93 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 94 | ParseResult Parser::parseSymbol(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 95 | { |
| 96 | skip(); |
| 97 | |
| 98 | if (peek().isLetter()) |
| 99 | { |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 100 | *node = T(get()); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 101 | return true; |
| 102 | } |
| 103 | |
| 104 | return false; |
| 105 | } |
| 106 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 107 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 108 | ParseResult Parser::parseIdentifier(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 109 | { |
| 110 | skip(); |
| 111 | |
| 112 | QString buffer; |
| 113 | |
| 114 | if (peek().isUpper()) |
| 115 | { |
| 116 | while (peek().isLetter() || peek() == '-' || peek() == '_' || peek().isNumber()) |
| 117 | { |
| 118 | buffer += get(); |
| 119 | } |
| 120 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 121 | *node = T(buffer); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 122 | return true; |
| 123 | } |
| 124 | |
| 125 | return false; |
| 126 | } |
| 127 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 128 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 129 | ParseResult Parser::parseNumber(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 130 | { |
| 131 | skip(); |
| 132 | |
| 133 | QString buffer; |
| 134 | |
| 135 | if (peek().isDigit()) |
| 136 | { |
| 137 | while (peek().isDigit()) |
| 138 | buffer += get(); |
| 139 | |
swissChili | 1060c0e | 2021-12-09 09:46:42 -0800 | [diff] [blame] | 140 | *node = T::fromInteger(buffer.toInt()); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 141 | return true; |
| 142 | } |
| 143 | |
| 144 | return false; |
| 145 | } |
| 146 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 147 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 148 | ParseResult Parser::parseVariable(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 149 | { |
| 150 | skip(); |
| 151 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 152 | ParsePos pos = save(); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 153 | |
| 154 | if (peek() == 's' || peek() == 'e' || peek() == 't') |
| 155 | { |
| 156 | char type = get().toLatin1(); |
| 157 | |
| 158 | if (peek() == '.') |
| 159 | { |
| 160 | get(); |
| 161 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 162 | T nameNode; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 163 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 164 | if (parseIdentifier(&nameNode)) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 165 | { |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 166 | *node = T(type, nameNode.name()); |
| 167 | return true; |
| 168 | } |
| 169 | else if (parseSymbol(&nameNode)) |
| 170 | { |
| 171 | *node = T(type, QString(nameNode.symbol())); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 172 | return true; |
| 173 | } |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 174 | else |
| 175 | { |
| 176 | ParseResult ret(ParseResult::INCOMPLETE, |
| 177 | "Expected identifier or symbol after . in variable", |
| 178 | pos); |
| 179 | |
| 180 | reset(pos); |
| 181 | |
| 182 | return ret; |
| 183 | } |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 184 | } |
| 185 | } |
| 186 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 187 | reset(pos); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 188 | return false; |
| 189 | } |
| 190 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 191 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 192 | ParseResult Parser::parseMany(QList<T> *list) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 193 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 194 | QList<T> nodes; |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 195 | T next; |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 196 | ParseResult ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 197 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 198 | while ((ret = parseOne(&next))) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 199 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 200 | // qDebug() << "parseMany one" << next; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 201 | nodes.append(next); |
| 202 | } |
| 203 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 204 | *list = nodes; |
| 205 | |
| 206 | if (ret.status() == ParseResult::INCOMPLETE) |
| 207 | return ret; |
| 208 | else |
| 209 | return true; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 210 | } |
| 211 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 212 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 213 | ParseResult Parser::parseParens(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 214 | { |
| 215 | skip(); |
| 216 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 217 | ParsePos pos = save(); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 218 | |
| 219 | if (peek() != '(') |
| 220 | return false; |
| 221 | |
| 222 | get(); |
| 223 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 224 | QList<T> many; |
| 225 | ParseResult ret = parseMany(&many); |
| 226 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 227 | *node = T(many); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 228 | |
| 229 | skip(); |
| 230 | if (peek() != ')') |
| 231 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 232 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected ) in parenthesized list", save()); |
| 233 | reset(pos); |
| 234 | |
| 235 | return ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | get(); |
| 239 | |
| 240 | return true; |
| 241 | } |
| 242 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 243 | ParseResult Parser::parseFunction(AstNode *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 244 | { |
| 245 | skip(); |
| 246 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 247 | ParsePos pos = save(); |
| 248 | ParseResult ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 249 | |
| 250 | if (peek() != '<') |
| 251 | return false; |
| 252 | |
| 253 | get(); |
| 254 | |
| 255 | AstNode head; |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 256 | if (!(ret = parseIdentifier(&head))) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 257 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 258 | reset(pos); |
| 259 | return ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 260 | } |
| 261 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 262 | QList<AstNode> body; |
| 263 | ret = parseMany(&body); |
| 264 | |
| 265 | if (!ret) |
| 266 | { |
| 267 | reset(pos); |
| 268 | return ret; |
| 269 | } |
| 270 | |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 271 | *node = AstNode(head.name(), body); |
| 272 | |
| 273 | skip(); |
| 274 | if (peek() != '>') |
| 275 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 276 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected >", save()); |
| 277 | reset(pos); |
| 278 | return ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | get(); |
| 282 | |
| 283 | return true; |
| 284 | } |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 285 | |
| 286 | template <> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 287 | ParseResult Parser::parseOne<Token>(Token *node) |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 288 | { |
| 289 | return parseVariable(node) || |
| 290 | parseNumber(node) || |
| 291 | parseIdentifier(node) || |
| 292 | parseSymbol(node) || |
| 293 | parseParens(node); |
| 294 | } |
| 295 | |
| 296 | template <> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 297 | ParseResult Parser::parseOne<AstNode>(AstNode *node) |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 298 | { |
| 299 | return parseFunction(node) || |
| 300 | parseVariable(node) || |
| 301 | parseNumber(node) || |
| 302 | parseIdentifier(node) || |
| 303 | parseSymbol(node) || |
| 304 | parseParens(node); |
| 305 | } |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 306 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 307 | ParseResult Parser::parseSentence(Sentence *sentence) |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 308 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 309 | ParsePos pos = save(); |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 310 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 311 | qDebug() << "Parsing sentence" << peek(); |
| 312 | |
| 313 | if (peek() == '}') |
| 314 | { |
| 315 | return false; |
| 316 | } |
| 317 | |
| 318 | QList<Token> pattern; |
| 319 | ParseResult ret = parseMany(&pattern); |
| 320 | |
| 321 | if (!ret) |
| 322 | { |
| 323 | qDebug() << "Many failed" << ret.message(); |
| 324 | reset(pos); |
| 325 | return ret; |
| 326 | } |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 327 | |
| 328 | skip(); |
| 329 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 330 | qDebug() << "will we get an =?" << peek(); |
| 331 | |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 332 | if (get() != '=') |
| 333 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 334 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected = in sentence", save()); |
| 335 | reset(pos); |
| 336 | return ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 337 | } |
| 338 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 339 | QList<AstNode> result; |
| 340 | ret = parseMany(&result); |
| 341 | |
| 342 | if (!ret) |
| 343 | { |
| 344 | qDebug() << "sentence parseMany returned" << ret.message(); |
| 345 | reset(pos); |
| 346 | return ret; |
| 347 | } |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 348 | |
| 349 | skip(); |
| 350 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 351 | qDebug() << "end of sentence" << peek(); |
| 352 | |
| 353 | if (peek() != '}' && get() != ';') |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 354 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 355 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected ; or } after sentence", save()); |
| 356 | reset(pos); |
| 357 | return ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | *sentence = Sentence(pattern, result); |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 361 | |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 362 | return true; |
| 363 | } |
| 364 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 365 | ParseResult Parser::parseFunctionDefinition(Function *function) |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 366 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 367 | ParsePos pos = save(); |
| 368 | ParseResult ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 369 | |
| 370 | Token identifier; |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 371 | if (!(ret = parseIdentifier(&identifier))) |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 372 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 373 | reset(pos); |
| 374 | return ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | QString name = identifier.name(); |
| 378 | Function func(name); |
| 379 | |
| 380 | skip(); |
| 381 | |
| 382 | if (get() != '{') |
| 383 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 384 | reset(pos); |
| 385 | return false; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | Sentence sentence; |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 389 | while ((ret = parseSentence(&sentence))) |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 390 | { |
| 391 | func.addSentence(sentence); |
| 392 | skip(); |
| 393 | } |
| 394 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 395 | if (ret.status() == ParseResult::INCOMPLETE) |
| 396 | { |
| 397 | qDebug() << "Function incomplete"; |
| 398 | reset(pos); |
| 399 | return ret; |
| 400 | } |
| 401 | |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 402 | if (get() != '}') |
| 403 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 404 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected } at end of function"); |
| 405 | reset(pos); |
| 406 | return ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 407 | } |
| 408 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame^] | 409 | qDebug() << "Function parsing succeeded"; |
| 410 | |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 411 | *function = func; |
| 412 | return true; |
| 413 | } |