Zack Williams | e940c7a | 2019-08-21 14:25:39 -0700 | [diff] [blame^] | 1 | package protoparse |
| 2 | |
| 3 | import "fmt" |
| 4 | |
| 5 | // This file defines all of the nodes in the proto AST. |
| 6 | |
| 7 | // ErrorWithSourcePos is an error about a proto source file includes information |
| 8 | // about the location in the file that caused the error. |
| 9 | type ErrorWithSourcePos struct { |
| 10 | Underlying error |
| 11 | Pos *SourcePos |
| 12 | } |
| 13 | |
| 14 | // Error implements the error interface |
| 15 | func (e ErrorWithSourcePos) Error() string { |
| 16 | if e.Pos.Line <= 0 || e.Pos.Col <= 0 { |
| 17 | return fmt.Sprintf("%s: %v", e.Pos.Filename, e.Underlying) |
| 18 | } |
| 19 | return fmt.Sprintf("%s:%d:%d: %v", e.Pos.Filename, e.Pos.Line, e.Pos.Col, e.Underlying) |
| 20 | } |
| 21 | |
| 22 | // SourcePos identifies a location in a proto source file. |
| 23 | type SourcePos struct { |
| 24 | Filename string |
| 25 | Line, Col int |
| 26 | Offset int |
| 27 | } |
| 28 | |
| 29 | func unknownPos(filename string) *SourcePos { |
| 30 | return &SourcePos{Filename: filename} |
| 31 | } |
| 32 | |
| 33 | type node interface { |
| 34 | start() *SourcePos |
| 35 | end() *SourcePos |
| 36 | leadingComments() []*comment |
| 37 | trailingComments() []*comment |
| 38 | } |
| 39 | |
| 40 | type terminalNode interface { |
| 41 | node |
| 42 | popLeadingComment() *comment |
| 43 | pushTrailingComment(*comment) |
| 44 | } |
| 45 | |
| 46 | var _ terminalNode = (*basicNode)(nil) |
| 47 | var _ terminalNode = (*stringLiteralNode)(nil) |
| 48 | var _ terminalNode = (*intLiteralNode)(nil) |
| 49 | var _ terminalNode = (*floatLiteralNode)(nil) |
| 50 | var _ terminalNode = (*identNode)(nil) |
| 51 | |
| 52 | type fileDecl interface { |
| 53 | node |
| 54 | getSyntax() node |
| 55 | } |
| 56 | |
| 57 | var _ fileDecl = (*fileNode)(nil) |
| 58 | var _ fileDecl = (*noSourceNode)(nil) |
| 59 | |
| 60 | type optionDecl interface { |
| 61 | node |
| 62 | getName() node |
| 63 | getValue() valueNode |
| 64 | } |
| 65 | |
| 66 | var _ optionDecl = (*optionNode)(nil) |
| 67 | var _ optionDecl = (*noSourceNode)(nil) |
| 68 | |
| 69 | type fieldDecl interface { |
| 70 | node |
| 71 | fieldLabel() node |
| 72 | fieldName() node |
| 73 | fieldType() node |
| 74 | fieldTag() node |
| 75 | fieldExtendee() node |
| 76 | getGroupKeyword() node |
| 77 | } |
| 78 | |
| 79 | var _ fieldDecl = (*fieldNode)(nil) |
| 80 | var _ fieldDecl = (*groupNode)(nil) |
| 81 | var _ fieldDecl = (*mapFieldNode)(nil) |
| 82 | var _ fieldDecl = (*syntheticMapField)(nil) |
| 83 | var _ fieldDecl = (*noSourceNode)(nil) |
| 84 | |
| 85 | type rangeDecl interface { |
| 86 | node |
| 87 | rangeStart() node |
| 88 | rangeEnd() node |
| 89 | } |
| 90 | |
| 91 | var _ rangeDecl = (*rangeNode)(nil) |
| 92 | var _ rangeDecl = (*noSourceNode)(nil) |
| 93 | |
| 94 | type enumValueDecl interface { |
| 95 | node |
| 96 | getName() node |
| 97 | getNumber() node |
| 98 | } |
| 99 | |
| 100 | var _ enumValueDecl = (*enumValueNode)(nil) |
| 101 | var _ enumValueDecl = (*noSourceNode)(nil) |
| 102 | |
| 103 | type msgDecl interface { |
| 104 | node |
| 105 | messageName() node |
| 106 | reservedNames() []*stringLiteralNode |
| 107 | } |
| 108 | |
| 109 | var _ msgDecl = (*messageNode)(nil) |
| 110 | var _ msgDecl = (*groupNode)(nil) |
| 111 | var _ msgDecl = (*mapFieldNode)(nil) |
| 112 | var _ msgDecl = (*noSourceNode)(nil) |
| 113 | |
| 114 | type methodDecl interface { |
| 115 | node |
| 116 | getInputType() node |
| 117 | getOutputType() node |
| 118 | } |
| 119 | |
| 120 | var _ methodDecl = (*methodNode)(nil) |
| 121 | var _ methodDecl = (*noSourceNode)(nil) |
| 122 | |
| 123 | type posRange struct { |
| 124 | start, end *SourcePos |
| 125 | } |
| 126 | |
| 127 | type basicNode struct { |
| 128 | posRange |
| 129 | leading []*comment |
| 130 | trailing []*comment |
| 131 | } |
| 132 | |
| 133 | func (n *basicNode) start() *SourcePos { |
| 134 | return n.posRange.start |
| 135 | } |
| 136 | |
| 137 | func (n *basicNode) end() *SourcePos { |
| 138 | return n.posRange.end |
| 139 | } |
| 140 | |
| 141 | func (n *basicNode) leadingComments() []*comment { |
| 142 | return n.leading |
| 143 | } |
| 144 | |
| 145 | func (n *basicNode) trailingComments() []*comment { |
| 146 | return n.trailing |
| 147 | } |
| 148 | |
| 149 | func (n *basicNode) popLeadingComment() *comment { |
| 150 | c := n.leading[0] |
| 151 | n.leading = n.leading[1:] |
| 152 | return c |
| 153 | } |
| 154 | |
| 155 | func (n *basicNode) pushTrailingComment(c *comment) { |
| 156 | n.trailing = append(n.trailing, c) |
| 157 | } |
| 158 | |
| 159 | type comment struct { |
| 160 | posRange |
| 161 | text string |
| 162 | } |
| 163 | |
| 164 | type basicCompositeNode struct { |
| 165 | first node |
| 166 | last node |
| 167 | } |
| 168 | |
| 169 | func (n *basicCompositeNode) start() *SourcePos { |
| 170 | return n.first.start() |
| 171 | } |
| 172 | |
| 173 | func (n *basicCompositeNode) end() *SourcePos { |
| 174 | return n.last.end() |
| 175 | } |
| 176 | |
| 177 | func (n *basicCompositeNode) leadingComments() []*comment { |
| 178 | return n.first.leadingComments() |
| 179 | } |
| 180 | |
| 181 | func (n *basicCompositeNode) trailingComments() []*comment { |
| 182 | return n.last.trailingComments() |
| 183 | } |
| 184 | |
| 185 | func (n *basicCompositeNode) setRange(first, last node) { |
| 186 | n.first = first |
| 187 | n.last = last |
| 188 | } |
| 189 | |
| 190 | type fileNode struct { |
| 191 | basicCompositeNode |
| 192 | syntax *syntaxNode |
| 193 | decls []*fileElement |
| 194 | |
| 195 | // These fields are populated after parsing, to make it easier to find them |
| 196 | // without searching decls. The parse result has a map of descriptors to |
| 197 | // nodes which makes the other declarations easily discoverable. But these |
| 198 | // elements do not map to descriptors -- they are just stored as strings in |
| 199 | // the file descriptor. |
| 200 | imports []*importNode |
| 201 | pkg *packageNode |
| 202 | } |
| 203 | |
| 204 | func (n *fileNode) getSyntax() node { |
| 205 | return n.syntax |
| 206 | } |
| 207 | |
| 208 | type fileElement struct { |
| 209 | // a discriminated union: only one field will be set |
| 210 | imp *importNode |
| 211 | pkg *packageNode |
| 212 | option *optionNode |
| 213 | message *messageNode |
| 214 | enum *enumNode |
| 215 | extend *extendNode |
| 216 | service *serviceNode |
| 217 | empty *basicNode |
| 218 | } |
| 219 | |
| 220 | func (n *fileElement) start() *SourcePos { |
| 221 | return n.get().start() |
| 222 | } |
| 223 | |
| 224 | func (n *fileElement) end() *SourcePos { |
| 225 | return n.get().end() |
| 226 | } |
| 227 | |
| 228 | func (n *fileElement) leadingComments() []*comment { |
| 229 | return n.get().leadingComments() |
| 230 | } |
| 231 | |
| 232 | func (n *fileElement) trailingComments() []*comment { |
| 233 | return n.get().trailingComments() |
| 234 | } |
| 235 | |
| 236 | func (n *fileElement) get() node { |
| 237 | switch { |
| 238 | case n.imp != nil: |
| 239 | return n.imp |
| 240 | case n.pkg != nil: |
| 241 | return n.pkg |
| 242 | case n.option != nil: |
| 243 | return n.option |
| 244 | case n.message != nil: |
| 245 | return n.message |
| 246 | case n.enum != nil: |
| 247 | return n.enum |
| 248 | case n.extend != nil: |
| 249 | return n.extend |
| 250 | case n.service != nil: |
| 251 | return n.service |
| 252 | default: |
| 253 | return n.empty |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | type syntaxNode struct { |
| 258 | basicCompositeNode |
| 259 | syntax *stringLiteralNode |
| 260 | } |
| 261 | |
| 262 | type importNode struct { |
| 263 | basicCompositeNode |
| 264 | name *stringLiteralNode |
| 265 | public bool |
| 266 | weak bool |
| 267 | } |
| 268 | |
| 269 | type packageNode struct { |
| 270 | basicCompositeNode |
| 271 | name *identNode |
| 272 | } |
| 273 | |
| 274 | type identifier string |
| 275 | |
| 276 | type identKind int |
| 277 | |
| 278 | const ( |
| 279 | identSimpleName identKind = iota |
| 280 | identQualified |
| 281 | identTypeName |
| 282 | ) |
| 283 | |
| 284 | type identNode struct { |
| 285 | basicNode |
| 286 | val string |
| 287 | kind identKind |
| 288 | } |
| 289 | |
| 290 | func (n *identNode) value() interface{} { |
| 291 | return identifier(n.val) |
| 292 | } |
| 293 | |
| 294 | type optionNode struct { |
| 295 | basicCompositeNode |
| 296 | name *optionNameNode |
| 297 | val valueNode |
| 298 | } |
| 299 | |
| 300 | func (n *optionNode) getName() node { |
| 301 | return n.name |
| 302 | } |
| 303 | |
| 304 | func (n *optionNode) getValue() valueNode { |
| 305 | return n.val |
| 306 | } |
| 307 | |
| 308 | type optionNameNode struct { |
| 309 | basicCompositeNode |
| 310 | parts []*optionNamePartNode |
| 311 | } |
| 312 | |
| 313 | type optionNamePartNode struct { |
| 314 | basicCompositeNode |
| 315 | text *identNode |
| 316 | offset int |
| 317 | length int |
| 318 | isExtension bool |
| 319 | st, en *SourcePos |
| 320 | } |
| 321 | |
| 322 | func (n *optionNamePartNode) start() *SourcePos { |
| 323 | if n.isExtension { |
| 324 | return n.basicCompositeNode.start() |
| 325 | } |
| 326 | return n.st |
| 327 | } |
| 328 | |
| 329 | func (n *optionNamePartNode) end() *SourcePos { |
| 330 | if n.isExtension { |
| 331 | return n.basicCompositeNode.end() |
| 332 | } |
| 333 | return n.en |
| 334 | } |
| 335 | |
| 336 | func (n *optionNamePartNode) setRange(first, last node) { |
| 337 | n.basicCompositeNode.setRange(first, last) |
| 338 | if !n.isExtension { |
| 339 | st := *first.start() |
| 340 | st.Col += n.offset |
| 341 | n.st = &st |
| 342 | en := st |
| 343 | en.Col += n.length |
| 344 | n.en = &en |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | type valueNode interface { |
| 349 | node |
| 350 | value() interface{} |
| 351 | } |
| 352 | |
| 353 | var _ valueNode = (*stringLiteralNode)(nil) |
| 354 | var _ valueNode = (*intLiteralNode)(nil) |
| 355 | var _ valueNode = (*negativeIntLiteralNode)(nil) |
| 356 | var _ valueNode = (*floatLiteralNode)(nil) |
| 357 | var _ valueNode = (*boolLiteralNode)(nil) |
| 358 | var _ valueNode = (*sliceLiteralNode)(nil) |
| 359 | var _ valueNode = (*aggregateLiteralNode)(nil) |
| 360 | var _ valueNode = (*noSourceNode)(nil) |
| 361 | |
| 362 | type stringLiteralNode struct { |
| 363 | basicCompositeNode |
| 364 | val string |
| 365 | } |
| 366 | |
| 367 | func (n *stringLiteralNode) value() interface{} { |
| 368 | return n.val |
| 369 | } |
| 370 | |
| 371 | func (n *stringLiteralNode) popLeadingComment() *comment { |
| 372 | return n.first.(terminalNode).popLeadingComment() |
| 373 | } |
| 374 | |
| 375 | func (n *stringLiteralNode) pushTrailingComment(c *comment) { |
| 376 | n.last.(terminalNode).pushTrailingComment(c) |
| 377 | } |
| 378 | |
| 379 | type intLiteralNode struct { |
| 380 | basicNode |
| 381 | val uint64 |
| 382 | } |
| 383 | |
| 384 | func (n *intLiteralNode) value() interface{} { |
| 385 | return n.val |
| 386 | } |
| 387 | |
| 388 | type negativeIntLiteralNode struct { |
| 389 | basicCompositeNode |
| 390 | val int64 |
| 391 | } |
| 392 | |
| 393 | func (n *negativeIntLiteralNode) value() interface{} { |
| 394 | return n.val |
| 395 | } |
| 396 | |
| 397 | type floatLiteralNode struct { |
| 398 | basicCompositeNode |
| 399 | val float64 |
| 400 | } |
| 401 | |
| 402 | func (n *floatLiteralNode) value() interface{} { |
| 403 | return n.val |
| 404 | } |
| 405 | |
| 406 | func (n *floatLiteralNode) popLeadingComment() *comment { |
| 407 | return n.first.(terminalNode).popLeadingComment() |
| 408 | } |
| 409 | |
| 410 | func (n *floatLiteralNode) pushTrailingComment(c *comment) { |
| 411 | n.last.(terminalNode).pushTrailingComment(c) |
| 412 | } |
| 413 | |
| 414 | type boolLiteralNode struct { |
| 415 | basicNode |
| 416 | val bool |
| 417 | } |
| 418 | |
| 419 | func (n *boolLiteralNode) value() interface{} { |
| 420 | return n.val |
| 421 | } |
| 422 | |
| 423 | type sliceLiteralNode struct { |
| 424 | basicCompositeNode |
| 425 | elements []valueNode |
| 426 | } |
| 427 | |
| 428 | func (n *sliceLiteralNode) value() interface{} { |
| 429 | return n.elements |
| 430 | } |
| 431 | |
| 432 | type aggregateLiteralNode struct { |
| 433 | basicCompositeNode |
| 434 | elements []*aggregateEntryNode |
| 435 | } |
| 436 | |
| 437 | func (n *aggregateLiteralNode) value() interface{} { |
| 438 | return n.elements |
| 439 | } |
| 440 | |
| 441 | type aggregateEntryNode struct { |
| 442 | basicCompositeNode |
| 443 | name *aggregateNameNode |
| 444 | val valueNode |
| 445 | } |
| 446 | |
| 447 | type aggregateNameNode struct { |
| 448 | basicCompositeNode |
| 449 | name *identNode |
| 450 | isExtension bool |
| 451 | } |
| 452 | |
| 453 | func (a *aggregateNameNode) value() string { |
| 454 | if a.isExtension { |
| 455 | return "[" + a.name.val + "]" |
| 456 | } else { |
| 457 | return a.name.val |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | type fieldNode struct { |
| 462 | basicCompositeNode |
| 463 | label *labelNode |
| 464 | fldType *identNode |
| 465 | name *identNode |
| 466 | tag *intLiteralNode |
| 467 | options []*optionNode |
| 468 | |
| 469 | // This field is populated after parsing, to allow lookup of extendee source |
| 470 | // locations when field extendees cannot be linked. (Otherwise, this is just |
| 471 | // stored as a string in the field descriptors defined inside the extend |
| 472 | // block). |
| 473 | extendee *extendNode |
| 474 | } |
| 475 | |
| 476 | func (n *fieldNode) fieldLabel() node { |
| 477 | // proto3 fields and fields inside one-ofs will not have a label and we need |
| 478 | // this check in order to return a nil node -- otherwise we'd return a |
| 479 | // non-nil node that has a nil pointer value in it :/ |
| 480 | if n.label == nil { |
| 481 | return nil |
| 482 | } |
| 483 | return n.label |
| 484 | } |
| 485 | |
| 486 | func (n *fieldNode) fieldName() node { |
| 487 | return n.name |
| 488 | } |
| 489 | |
| 490 | func (n *fieldNode) fieldType() node { |
| 491 | return n.fldType |
| 492 | } |
| 493 | |
| 494 | func (n *fieldNode) fieldTag() node { |
| 495 | return n.tag |
| 496 | } |
| 497 | |
| 498 | func (n *fieldNode) fieldExtendee() node { |
| 499 | if n.extendee != nil { |
| 500 | return n.extendee.extendee |
| 501 | } |
| 502 | return nil |
| 503 | } |
| 504 | |
| 505 | func (n *fieldNode) getGroupKeyword() node { |
| 506 | return nil |
| 507 | } |
| 508 | |
| 509 | type labelNode struct { |
| 510 | basicNode |
| 511 | repeated bool |
| 512 | required bool |
| 513 | } |
| 514 | |
| 515 | type groupNode struct { |
| 516 | basicCompositeNode |
| 517 | groupKeyword *identNode |
| 518 | label *labelNode |
| 519 | name *identNode |
| 520 | tag *intLiteralNode |
| 521 | decls []*messageElement |
| 522 | |
| 523 | // This field is populated after parsing, to make it easier to find them |
| 524 | // without searching decls. The parse result has a map of descriptors to |
| 525 | // nodes which makes the other declarations easily discoverable. But these |
| 526 | // elements do not map to descriptors -- they are just stored as strings in |
| 527 | // the message descriptor. |
| 528 | reserved []*stringLiteralNode |
| 529 | // This field is populated after parsing, to allow lookup of extendee source |
| 530 | // locations when field extendees cannot be linked. (Otherwise, this is just |
| 531 | // stored as a string in the field descriptors defined inside the extend |
| 532 | // block). |
| 533 | extendee *extendNode |
| 534 | } |
| 535 | |
| 536 | func (n *groupNode) fieldLabel() node { |
| 537 | return n.label |
| 538 | } |
| 539 | |
| 540 | func (n *groupNode) fieldName() node { |
| 541 | return n.name |
| 542 | } |
| 543 | |
| 544 | func (n *groupNode) fieldType() node { |
| 545 | return n.name |
| 546 | } |
| 547 | |
| 548 | func (n *groupNode) fieldTag() node { |
| 549 | return n.tag |
| 550 | } |
| 551 | |
| 552 | func (n *groupNode) fieldExtendee() node { |
| 553 | if n.extendee != nil { |
| 554 | return n.extendee.extendee |
| 555 | } |
| 556 | return nil |
| 557 | } |
| 558 | |
| 559 | func (n *groupNode) getGroupKeyword() node { |
| 560 | return n.groupKeyword |
| 561 | } |
| 562 | |
| 563 | func (n *groupNode) messageName() node { |
| 564 | return n.name |
| 565 | } |
| 566 | |
| 567 | func (n *groupNode) reservedNames() []*stringLiteralNode { |
| 568 | return n.reserved |
| 569 | } |
| 570 | |
| 571 | type oneOfNode struct { |
| 572 | basicCompositeNode |
| 573 | name *identNode |
| 574 | decls []*oneOfElement |
| 575 | } |
| 576 | |
| 577 | type oneOfElement struct { |
| 578 | // a discriminated union: only one field will be set |
| 579 | option *optionNode |
| 580 | field *fieldNode |
| 581 | empty *basicNode |
| 582 | } |
| 583 | |
| 584 | func (n *oneOfElement) start() *SourcePos { |
| 585 | return n.get().start() |
| 586 | } |
| 587 | |
| 588 | func (n *oneOfElement) end() *SourcePos { |
| 589 | return n.get().end() |
| 590 | } |
| 591 | |
| 592 | func (n *oneOfElement) leadingComments() []*comment { |
| 593 | return n.get().leadingComments() |
| 594 | } |
| 595 | |
| 596 | func (n *oneOfElement) trailingComments() []*comment { |
| 597 | return n.get().trailingComments() |
| 598 | } |
| 599 | |
| 600 | func (n *oneOfElement) get() node { |
| 601 | switch { |
| 602 | case n.option != nil: |
| 603 | return n.option |
| 604 | case n.field != nil: |
| 605 | return n.field |
| 606 | default: |
| 607 | return n.empty |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | type mapFieldNode struct { |
| 612 | basicCompositeNode |
| 613 | mapKeyword *identNode |
| 614 | keyType *identNode |
| 615 | valueType *identNode |
| 616 | name *identNode |
| 617 | tag *intLiteralNode |
| 618 | options []*optionNode |
| 619 | } |
| 620 | |
| 621 | func (n *mapFieldNode) fieldLabel() node { |
| 622 | return n.mapKeyword |
| 623 | } |
| 624 | |
| 625 | func (n *mapFieldNode) fieldName() node { |
| 626 | return n.name |
| 627 | } |
| 628 | |
| 629 | func (n *mapFieldNode) fieldType() node { |
| 630 | return n.mapKeyword |
| 631 | } |
| 632 | |
| 633 | func (n *mapFieldNode) fieldTag() node { |
| 634 | return n.tag |
| 635 | } |
| 636 | |
| 637 | func (n *mapFieldNode) fieldExtendee() node { |
| 638 | return nil |
| 639 | } |
| 640 | |
| 641 | func (n *mapFieldNode) getGroupKeyword() node { |
| 642 | return nil |
| 643 | } |
| 644 | |
| 645 | func (n *mapFieldNode) messageName() node { |
| 646 | return n.name |
| 647 | } |
| 648 | |
| 649 | func (n *mapFieldNode) reservedNames() []*stringLiteralNode { |
| 650 | return nil |
| 651 | } |
| 652 | |
| 653 | func (n *mapFieldNode) keyField() *syntheticMapField { |
| 654 | tag := &intLiteralNode{ |
| 655 | basicNode: basicNode{ |
| 656 | posRange: posRange{start: n.keyType.start(), end: n.keyType.end()}, |
| 657 | }, |
| 658 | val: 1, |
| 659 | } |
| 660 | return &syntheticMapField{ident: n.keyType, tag: tag} |
| 661 | } |
| 662 | |
| 663 | func (n *mapFieldNode) valueField() *syntheticMapField { |
| 664 | tag := &intLiteralNode{ |
| 665 | basicNode: basicNode{ |
| 666 | posRange: posRange{start: n.valueType.start(), end: n.valueType.end()}, |
| 667 | }, |
| 668 | val: 2, |
| 669 | } |
| 670 | return &syntheticMapField{ident: n.valueType, tag: tag} |
| 671 | } |
| 672 | |
| 673 | type syntheticMapField struct { |
| 674 | ident *identNode |
| 675 | tag *intLiteralNode |
| 676 | } |
| 677 | |
| 678 | func (n *syntheticMapField) start() *SourcePos { |
| 679 | return n.ident.start() |
| 680 | } |
| 681 | |
| 682 | func (n *syntheticMapField) end() *SourcePos { |
| 683 | return n.ident.end() |
| 684 | } |
| 685 | |
| 686 | func (n *syntheticMapField) leadingComments() []*comment { |
| 687 | return nil |
| 688 | } |
| 689 | |
| 690 | func (n *syntheticMapField) trailingComments() []*comment { |
| 691 | return nil |
| 692 | } |
| 693 | |
| 694 | func (n *syntheticMapField) fieldLabel() node { |
| 695 | return n.ident |
| 696 | } |
| 697 | |
| 698 | func (n *syntheticMapField) fieldName() node { |
| 699 | return n.ident |
| 700 | } |
| 701 | |
| 702 | func (n *syntheticMapField) fieldType() node { |
| 703 | return n.ident |
| 704 | } |
| 705 | |
| 706 | func (n *syntheticMapField) fieldTag() node { |
| 707 | return n.tag |
| 708 | } |
| 709 | |
| 710 | func (n *syntheticMapField) fieldExtendee() node { |
| 711 | return nil |
| 712 | } |
| 713 | |
| 714 | func (n *syntheticMapField) getGroupKeyword() node { |
| 715 | return nil |
| 716 | } |
| 717 | |
| 718 | type extensionRangeNode struct { |
| 719 | basicCompositeNode |
| 720 | ranges []*rangeNode |
| 721 | options []*optionNode |
| 722 | } |
| 723 | |
| 724 | type rangeNode struct { |
| 725 | basicCompositeNode |
| 726 | stNode, enNode node |
| 727 | st, en int32 |
| 728 | } |
| 729 | |
| 730 | func (n *rangeNode) rangeStart() node { |
| 731 | return n.stNode |
| 732 | } |
| 733 | |
| 734 | func (n *rangeNode) rangeEnd() node { |
| 735 | return n.enNode |
| 736 | } |
| 737 | |
| 738 | type reservedNode struct { |
| 739 | basicCompositeNode |
| 740 | ranges []*rangeNode |
| 741 | names []*stringLiteralNode |
| 742 | } |
| 743 | |
| 744 | type enumNode struct { |
| 745 | basicCompositeNode |
| 746 | name *identNode |
| 747 | decls []*enumElement |
| 748 | |
| 749 | // This field is populated after parsing, to make it easier to find them |
| 750 | // without searching decls. The parse result has a map of descriptors to |
| 751 | // nodes which makes the other declarations easily discoverable. But these |
| 752 | // elements do not map to descriptors -- they are just stored as strings in |
| 753 | // the message descriptor. |
| 754 | reserved []*stringLiteralNode |
| 755 | } |
| 756 | |
| 757 | type enumElement struct { |
| 758 | // a discriminated union: only one field will be set |
| 759 | option *optionNode |
| 760 | value *enumValueNode |
| 761 | reserved *reservedNode |
| 762 | empty *basicNode |
| 763 | } |
| 764 | |
| 765 | func (n *enumElement) start() *SourcePos { |
| 766 | return n.get().start() |
| 767 | } |
| 768 | |
| 769 | func (n *enumElement) end() *SourcePos { |
| 770 | return n.get().end() |
| 771 | } |
| 772 | |
| 773 | func (n *enumElement) leadingComments() []*comment { |
| 774 | return n.get().leadingComments() |
| 775 | } |
| 776 | |
| 777 | func (n *enumElement) trailingComments() []*comment { |
| 778 | return n.get().trailingComments() |
| 779 | } |
| 780 | |
| 781 | func (n *enumElement) get() node { |
| 782 | switch { |
| 783 | case n.option != nil: |
| 784 | return n.option |
| 785 | case n.value != nil: |
| 786 | return n.value |
| 787 | default: |
| 788 | return n.empty |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | type enumValueNode struct { |
| 793 | basicCompositeNode |
| 794 | name *identNode |
| 795 | options []*optionNode |
| 796 | |
| 797 | // only one of these two will be set: |
| 798 | |
| 799 | numberP *intLiteralNode // positive numeric value |
| 800 | numberN *negativeIntLiteralNode // negative numeric value |
| 801 | } |
| 802 | |
| 803 | func (n *enumValueNode) getName() node { |
| 804 | return n.name |
| 805 | } |
| 806 | |
| 807 | func (n *enumValueNode) getNumber() node { |
| 808 | if n.numberP != nil { |
| 809 | return n.numberP |
| 810 | } |
| 811 | return n.numberN |
| 812 | } |
| 813 | |
| 814 | type messageNode struct { |
| 815 | basicCompositeNode |
| 816 | name *identNode |
| 817 | decls []*messageElement |
| 818 | |
| 819 | // This field is populated after parsing, to make it easier to find them |
| 820 | // without searching decls. The parse result has a map of descriptors to |
| 821 | // nodes which makes the other declarations easily discoverable. But these |
| 822 | // elements do not map to descriptors -- they are just stored as strings in |
| 823 | // the message descriptor. |
| 824 | reserved []*stringLiteralNode |
| 825 | } |
| 826 | |
| 827 | func (n *messageNode) messageName() node { |
| 828 | return n.name |
| 829 | } |
| 830 | |
| 831 | func (n *messageNode) reservedNames() []*stringLiteralNode { |
| 832 | return n.reserved |
| 833 | } |
| 834 | |
| 835 | type messageElement struct { |
| 836 | // a discriminated union: only one field will be set |
| 837 | option *optionNode |
| 838 | field *fieldNode |
| 839 | mapField *mapFieldNode |
| 840 | oneOf *oneOfNode |
| 841 | group *groupNode |
| 842 | nested *messageNode |
| 843 | enum *enumNode |
| 844 | extend *extendNode |
| 845 | extensionRange *extensionRangeNode |
| 846 | reserved *reservedNode |
| 847 | empty *basicNode |
| 848 | } |
| 849 | |
| 850 | func (n *messageElement) start() *SourcePos { |
| 851 | return n.get().start() |
| 852 | } |
| 853 | |
| 854 | func (n *messageElement) end() *SourcePos { |
| 855 | return n.get().end() |
| 856 | } |
| 857 | |
| 858 | func (n *messageElement) leadingComments() []*comment { |
| 859 | return n.get().leadingComments() |
| 860 | } |
| 861 | |
| 862 | func (n *messageElement) trailingComments() []*comment { |
| 863 | return n.get().trailingComments() |
| 864 | } |
| 865 | |
| 866 | func (n *messageElement) get() node { |
| 867 | switch { |
| 868 | case n.option != nil: |
| 869 | return n.option |
| 870 | case n.field != nil: |
| 871 | return n.field |
| 872 | case n.mapField != nil: |
| 873 | return n.mapField |
| 874 | case n.oneOf != nil: |
| 875 | return n.oneOf |
| 876 | case n.group != nil: |
| 877 | return n.group |
| 878 | case n.nested != nil: |
| 879 | return n.nested |
| 880 | case n.enum != nil: |
| 881 | return n.enum |
| 882 | case n.extend != nil: |
| 883 | return n.extend |
| 884 | case n.extensionRange != nil: |
| 885 | return n.extensionRange |
| 886 | case n.reserved != nil: |
| 887 | return n.reserved |
| 888 | default: |
| 889 | return n.empty |
| 890 | } |
| 891 | } |
| 892 | |
| 893 | type extendNode struct { |
| 894 | basicCompositeNode |
| 895 | extendee *identNode |
| 896 | decls []*extendElement |
| 897 | } |
| 898 | |
| 899 | type extendElement struct { |
| 900 | // a discriminated union: only one field will be set |
| 901 | field *fieldNode |
| 902 | group *groupNode |
| 903 | empty *basicNode |
| 904 | } |
| 905 | |
| 906 | func (n *extendElement) start() *SourcePos { |
| 907 | return n.get().start() |
| 908 | } |
| 909 | |
| 910 | func (n *extendElement) end() *SourcePos { |
| 911 | return n.get().end() |
| 912 | } |
| 913 | |
| 914 | func (n *extendElement) leadingComments() []*comment { |
| 915 | return n.get().leadingComments() |
| 916 | } |
| 917 | |
| 918 | func (n *extendElement) trailingComments() []*comment { |
| 919 | return n.get().trailingComments() |
| 920 | } |
| 921 | |
| 922 | func (n *extendElement) get() node { |
| 923 | switch { |
| 924 | case n.field != nil: |
| 925 | return n.field |
| 926 | case n.group != nil: |
| 927 | return n.group |
| 928 | default: |
| 929 | return n.empty |
| 930 | } |
| 931 | } |
| 932 | |
| 933 | type serviceNode struct { |
| 934 | basicCompositeNode |
| 935 | name *identNode |
| 936 | decls []*serviceElement |
| 937 | } |
| 938 | |
| 939 | type serviceElement struct { |
| 940 | // a discriminated union: only one field will be set |
| 941 | option *optionNode |
| 942 | rpc *methodNode |
| 943 | empty *basicNode |
| 944 | } |
| 945 | |
| 946 | func (n *serviceElement) start() *SourcePos { |
| 947 | return n.get().start() |
| 948 | } |
| 949 | |
| 950 | func (n *serviceElement) end() *SourcePos { |
| 951 | return n.get().end() |
| 952 | } |
| 953 | |
| 954 | func (n *serviceElement) leadingComments() []*comment { |
| 955 | return n.get().leadingComments() |
| 956 | } |
| 957 | |
| 958 | func (n *serviceElement) trailingComments() []*comment { |
| 959 | return n.get().trailingComments() |
| 960 | } |
| 961 | |
| 962 | func (n *serviceElement) get() node { |
| 963 | switch { |
| 964 | case n.option != nil: |
| 965 | return n.option |
| 966 | case n.rpc != nil: |
| 967 | return n.rpc |
| 968 | default: |
| 969 | return n.empty |
| 970 | } |
| 971 | } |
| 972 | |
| 973 | type methodNode struct { |
| 974 | basicCompositeNode |
| 975 | name *identNode |
| 976 | input *rpcTypeNode |
| 977 | output *rpcTypeNode |
| 978 | options []*optionNode |
| 979 | } |
| 980 | |
| 981 | func (n *methodNode) getInputType() node { |
| 982 | return n.input.msgType |
| 983 | } |
| 984 | |
| 985 | func (n *methodNode) getOutputType() node { |
| 986 | return n.output.msgType |
| 987 | } |
| 988 | |
| 989 | type rpcTypeNode struct { |
| 990 | basicCompositeNode |
| 991 | msgType *identNode |
| 992 | streamKeyword node |
| 993 | } |
| 994 | |
| 995 | type noSourceNode struct { |
| 996 | pos *SourcePos |
| 997 | } |
| 998 | |
| 999 | func (n noSourceNode) start() *SourcePos { |
| 1000 | return n.pos |
| 1001 | } |
| 1002 | |
| 1003 | func (n noSourceNode) end() *SourcePos { |
| 1004 | return n.pos |
| 1005 | } |
| 1006 | |
| 1007 | func (n noSourceNode) leadingComments() []*comment { |
| 1008 | return nil |
| 1009 | } |
| 1010 | |
| 1011 | func (n noSourceNode) trailingComments() []*comment { |
| 1012 | return nil |
| 1013 | } |
| 1014 | |
| 1015 | func (n noSourceNode) getSyntax() node { |
| 1016 | return n |
| 1017 | } |
| 1018 | |
| 1019 | func (n noSourceNode) getName() node { |
| 1020 | return n |
| 1021 | } |
| 1022 | |
| 1023 | func (n noSourceNode) getValue() valueNode { |
| 1024 | return n |
| 1025 | } |
| 1026 | |
| 1027 | func (n noSourceNode) fieldLabel() node { |
| 1028 | return n |
| 1029 | } |
| 1030 | |
| 1031 | func (n noSourceNode) fieldName() node { |
| 1032 | return n |
| 1033 | } |
| 1034 | |
| 1035 | func (n noSourceNode) fieldType() node { |
| 1036 | return n |
| 1037 | } |
| 1038 | |
| 1039 | func (n noSourceNode) fieldTag() node { |
| 1040 | return n |
| 1041 | } |
| 1042 | |
| 1043 | func (n noSourceNode) fieldExtendee() node { |
| 1044 | return n |
| 1045 | } |
| 1046 | |
| 1047 | func (n noSourceNode) getGroupKeyword() node { |
| 1048 | return n |
| 1049 | } |
| 1050 | |
| 1051 | func (n noSourceNode) rangeStart() node { |
| 1052 | return n |
| 1053 | } |
| 1054 | |
| 1055 | func (n noSourceNode) rangeEnd() node { |
| 1056 | return n |
| 1057 | } |
| 1058 | |
| 1059 | func (n noSourceNode) getNumber() node { |
| 1060 | return n |
| 1061 | } |
| 1062 | |
| 1063 | func (n noSourceNode) messageName() node { |
| 1064 | return n |
| 1065 | } |
| 1066 | |
| 1067 | func (n noSourceNode) reservedNames() []*stringLiteralNode { |
| 1068 | return nil |
| 1069 | } |
| 1070 | |
| 1071 | func (n noSourceNode) getInputType() node { |
| 1072 | return n |
| 1073 | } |
| 1074 | |
| 1075 | func (n noSourceNode) getOutputType() node { |
| 1076 | return n |
| 1077 | } |
| 1078 | |
| 1079 | func (n noSourceNode) value() interface{} { |
| 1080 | return nil |
| 1081 | } |