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 | 2506b92 | 2022-02-15 21:07:20 -0800 | [diff] [blame^] | 40 | ParseResult ParseResult::operator ||(const ParseResult &other) const |
| 41 | { |
| 42 | if (_status == COMPLETE || _status == INCOMPLETE) |
| 43 | return *this; |
| 44 | else |
| 45 | return other; |
| 46 | } |
| 47 | |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 48 | Parser::Parser(QString input) |
| 49 | { |
| 50 | _input = input; |
| 51 | } |
| 52 | |
| 53 | QChar Parser::peek() |
| 54 | { |
| 55 | if (atEnd()) |
| 56 | return 0; |
| 57 | |
| 58 | return _input[_pos]; |
| 59 | } |
| 60 | |
| 61 | QChar Parser::get() |
| 62 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 63 | QChar c = _input[_pos++]; |
| 64 | |
| 65 | if (c == '\n') |
| 66 | { |
| 67 | _line++; |
| 68 | _offset = 0; |
| 69 | } |
| 70 | else |
| 71 | { |
| 72 | _offset++; |
| 73 | } |
| 74 | |
| 75 | return c; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | bool Parser::atEnd() |
| 79 | { |
| 80 | return _pos >= _input.length(); |
| 81 | } |
| 82 | |
| 83 | void Parser::skip() |
| 84 | { |
| 85 | while (peek().isSpace()) |
| 86 | get(); |
| 87 | } |
| 88 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 89 | ParsePos Parser::save() const |
| 90 | { |
| 91 | return ParsePos{_line, _pos, _offset}; |
| 92 | } |
| 93 | |
| 94 | void Parser::reset(ParsePos pos) |
| 95 | { |
| 96 | _line = pos.line; |
| 97 | _pos = pos.pos; |
| 98 | _offset = pos.lineOffset; |
| 99 | } |
| 100 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 101 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 102 | ParseResult Parser::parseSymbol(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 103 | { |
| 104 | skip(); |
| 105 | |
| 106 | if (peek().isLetter()) |
| 107 | { |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 108 | *node = T(get()); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 109 | return true; |
| 110 | } |
| 111 | |
| 112 | return false; |
| 113 | } |
| 114 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 115 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 116 | ParseResult Parser::parseIdentifier(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 117 | { |
| 118 | skip(); |
| 119 | |
| 120 | QString buffer; |
| 121 | |
| 122 | if (peek().isUpper()) |
| 123 | { |
| 124 | while (peek().isLetter() || peek() == '-' || peek() == '_' || peek().isNumber()) |
| 125 | { |
| 126 | buffer += get(); |
| 127 | } |
| 128 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 129 | *node = T(buffer); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 130 | return true; |
| 131 | } |
| 132 | |
| 133 | return false; |
| 134 | } |
| 135 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 136 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 137 | ParseResult Parser::parseNumber(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 138 | { |
| 139 | skip(); |
| 140 | |
| 141 | QString buffer; |
| 142 | |
| 143 | if (peek().isDigit()) |
| 144 | { |
| 145 | while (peek().isDigit()) |
| 146 | buffer += get(); |
| 147 | |
swissChili | 1060c0e | 2021-12-09 09:46:42 -0800 | [diff] [blame] | 148 | *node = T::fromInteger(buffer.toInt()); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 149 | return true; |
| 150 | } |
| 151 | |
| 152 | return false; |
| 153 | } |
| 154 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 155 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 156 | ParseResult Parser::parseVariable(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 157 | { |
| 158 | skip(); |
| 159 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 160 | ParsePos pos = save(); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 161 | |
| 162 | if (peek() == 's' || peek() == 'e' || peek() == 't') |
| 163 | { |
| 164 | char type = get().toLatin1(); |
| 165 | |
| 166 | if (peek() == '.') |
| 167 | { |
| 168 | get(); |
| 169 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 170 | T nameNode; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 171 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 172 | if (parseIdentifier(&nameNode)) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 173 | { |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 174 | *node = T(type, nameNode.name()); |
| 175 | return true; |
| 176 | } |
| 177 | else if (parseSymbol(&nameNode)) |
| 178 | { |
| 179 | *node = T(type, QString(nameNode.symbol())); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 180 | return true; |
| 181 | } |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 182 | else |
| 183 | { |
| 184 | ParseResult ret(ParseResult::INCOMPLETE, |
| 185 | "Expected identifier or symbol after . in variable", |
| 186 | pos); |
| 187 | |
| 188 | reset(pos); |
| 189 | |
| 190 | return ret; |
| 191 | } |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 192 | } |
| 193 | } |
| 194 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 195 | reset(pos); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 196 | return false; |
| 197 | } |
| 198 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 199 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 200 | ParseResult Parser::parseMany(QList<T> *list) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 201 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 202 | QList<T> nodes; |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 203 | T next; |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 204 | ParseResult ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 205 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 206 | while ((ret = parseOne(&next))) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 207 | { |
| 208 | nodes.append(next); |
| 209 | } |
| 210 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 211 | *list = nodes; |
| 212 | |
| 213 | if (ret.status() == ParseResult::INCOMPLETE) |
| 214 | return ret; |
| 215 | else |
| 216 | return true; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 217 | } |
| 218 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 219 | template <typename T> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 220 | ParseResult Parser::parseParens(T *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 221 | { |
| 222 | skip(); |
| 223 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 224 | ParsePos pos = save(); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 225 | |
| 226 | if (peek() != '(') |
| 227 | return false; |
| 228 | |
| 229 | get(); |
| 230 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 231 | QList<T> many; |
| 232 | ParseResult ret = parseMany(&many); |
| 233 | |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 234 | *node = T(many); |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 235 | |
| 236 | skip(); |
| 237 | if (peek() != ')') |
| 238 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 239 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected ) in parenthesized list", save()); |
| 240 | reset(pos); |
| 241 | |
| 242 | return ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | get(); |
| 246 | |
| 247 | return true; |
| 248 | } |
| 249 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 250 | ParseResult Parser::parseFunction(AstNode *node) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 251 | { |
| 252 | skip(); |
| 253 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 254 | ParsePos pos = save(); |
| 255 | ParseResult ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 256 | |
| 257 | if (peek() != '<') |
| 258 | return false; |
| 259 | |
| 260 | get(); |
| 261 | |
| 262 | AstNode head; |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 263 | if (!(ret = parseIdentifier(&head))) |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 264 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 265 | reset(pos); |
| 266 | return ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 267 | } |
| 268 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 269 | QList<AstNode> body; |
| 270 | ret = parseMany(&body); |
| 271 | |
| 272 | if (!ret) |
| 273 | { |
| 274 | reset(pos); |
| 275 | return ret; |
| 276 | } |
| 277 | |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 278 | *node = AstNode(head.name(), body); |
| 279 | |
| 280 | skip(); |
| 281 | if (peek() != '>') |
| 282 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 283 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected >", save()); |
| 284 | reset(pos); |
| 285 | return ret; |
swissChili | c71acc6 | 2021-12-07 08:03:37 -0800 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | get(); |
| 289 | |
| 290 | return true; |
| 291 | } |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 292 | |
| 293 | template <> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 294 | ParseResult Parser::parseOne<Token>(Token *node) |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 295 | { |
| 296 | return parseVariable(node) || |
| 297 | parseNumber(node) || |
| 298 | parseIdentifier(node) || |
| 299 | parseSymbol(node) || |
| 300 | parseParens(node); |
| 301 | } |
| 302 | |
| 303 | template <> |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 304 | ParseResult Parser::parseOne<AstNode>(AstNode *node) |
swissChili | 682e7bc | 2021-12-07 09:04:54 -0800 | [diff] [blame] | 305 | { |
| 306 | return parseFunction(node) || |
| 307 | parseVariable(node) || |
| 308 | parseNumber(node) || |
| 309 | parseIdentifier(node) || |
| 310 | parseSymbol(node) || |
| 311 | parseParens(node); |
| 312 | } |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 313 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 314 | ParseResult Parser::parseSentence(Sentence *sentence) |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 315 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 316 | ParsePos pos = save(); |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 317 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 318 | if (peek() == '}') |
| 319 | { |
| 320 | return false; |
| 321 | } |
| 322 | |
| 323 | QList<Token> pattern; |
| 324 | ParseResult ret = parseMany(&pattern); |
| 325 | |
| 326 | if (!ret) |
| 327 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 328 | reset(pos); |
| 329 | return ret; |
| 330 | } |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 331 | |
| 332 | skip(); |
| 333 | |
| 334 | if (get() != '=') |
| 335 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 336 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected = in sentence", save()); |
| 337 | reset(pos); |
| 338 | return ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 339 | } |
| 340 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 341 | QList<AstNode> result; |
| 342 | ret = parseMany(&result); |
| 343 | |
| 344 | if (!ret) |
| 345 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 346 | reset(pos); |
| 347 | return ret; |
| 348 | } |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 349 | |
| 350 | skip(); |
| 351 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 352 | if (peek() != '}' && get() != ';') |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 353 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 354 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected ; or } after sentence", save()); |
| 355 | reset(pos); |
| 356 | return ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | *sentence = Sentence(pattern, result); |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 360 | |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 361 | return true; |
| 362 | } |
| 363 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 364 | ParseResult Parser::parseFunctionDefinition(Function *function) |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 365 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 366 | ParsePos pos = save(); |
| 367 | ParseResult ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 368 | |
| 369 | Token identifier; |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 370 | if (!(ret = parseIdentifier(&identifier))) |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 371 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 372 | reset(pos); |
| 373 | return ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | QString name = identifier.name(); |
| 377 | Function func(name); |
| 378 | |
| 379 | skip(); |
| 380 | |
| 381 | if (get() != '{') |
| 382 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 383 | reset(pos); |
| 384 | return false; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | Sentence sentence; |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 388 | while ((ret = parseSentence(&sentence))) |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 389 | { |
| 390 | func.addSentence(sentence); |
| 391 | skip(); |
| 392 | } |
| 393 | |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 394 | if (ret.status() == ParseResult::INCOMPLETE) |
| 395 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 396 | reset(pos); |
| 397 | return ret; |
| 398 | } |
| 399 | |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 400 | if (get() != '}') |
| 401 | { |
swissChili | 847a78c | 2021-12-09 17:44:52 -0800 | [diff] [blame] | 402 | ret = ParseResult(ParseResult::INCOMPLETE, "Expected } at end of function"); |
| 403 | reset(pos); |
| 404 | return ret; |
swissChili | 8a581c6 | 2021-12-07 13:29:21 -0800 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | *function = func; |
| 408 | return true; |
| 409 | } |