All files / src/abap/5_syntax basic_types.ts

90.67% Statements 739/815
85.84% Branches 291/339
100% Functions 15/15
90.67% Lines 739/815

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 8151x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2514x 2514x 2514x 1x 1x 135x 135x 25x 25x 110x 110x 135x 48x 48x 62x 62x 135x 7x 7x 7x 7x 7x 7x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 7x 5x 5x 5x 5x 5x 7x 135x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 54x 54x 135x 135x 2x 2x 52x 52x 135x 20x 20x 32x 32x 135x     32x 32x 32x 1x 1x 113x     113x 113x 113x 2x 2x 113x 2x 2x 113x 2x 2x 113x     113x 113x 113x 113x     113x 113x 113x 15x 113x 98x 98x 98x 98x 98x 13x 13x 13x 98x 98x 86x 86x 98x 98x 12x 12x 98x 98x 8x 8x 8x 90x 98x 43x 43x 43x 21x 1x 1x 43x 2x 2x 2x 22x 20x 20x 1x 1x 20x 20x 20x 20x     20x 20x 43x 89x 98x 4x 98x 85x 85x 2x 85x 83x 83x     98x 100x 113x 1x 1x 99x 99x 99x 1x 1x 2009x 2009x 2009x 38x 38x 1971x 1971x 2009x 123x 3x 3x 123x 123x 1848x 1848x 1848x 2009x 1214x 1214x 633x 633x 2009x 380x 380x 380x 4x 4x 4x 4x 4x 4x 380x 380x 380x 380x 253x 2009x 2009x 2x 2x 2x 251x 251x 251x 251x 251x 251x   251x 177x 177x 251x 251x       1x 1x 1525x 1525x 1133x 1133x 1525x     1525x 1525x 3x 3x 1525x 1525x 1525x 392x 5x 392x 387x 387x 387x 143x 143x 387x 1525x     1525x 1525x 1525x 1523x 1523x       1x 1x 345x 345x 345x     345x 345x 345x 283x 345x 13x 62x 4x 4x 345x 345x 300x 300x 22x 22x 300x 345x 345x 345x 345x 345x 345x 345x 345x 345x 345x 345x 345x 12x 12x 12x 12x 345x 333x 333x 333x 308x 308x 308x 308x 333x 25x 25x 25x 4x 4x 4x 4x 25x 21x 21x 21x 21x 1x 21x 4x 4x 4x     4x 4x 4x 4x 4x 4x 4x 20x 2x 2x 2x     2x 2x 2x 2x 2x 2x 2x 2x 14x 14x 14x 14x 1x 1x 1923x 1923x 1923x 1923x 401x 401x 1923x 185x 185x 1x 1x 185x 1923x 164x 164x 1923x 144x 144x 1923x 1923x 1923x 36x 36x 36x 2x 2x 36x 36x 36x   36x 28x 36x 7x 8x 1x 1x 1923x 1x 1x 1x     1x 1887x 1886x 1886x 1886x 1886x 9x 1886x 65x 65x 7x 7x 65x 3x 3x 65x 2x 2x 65x 65x 65x 2x 2x 1877x 2x 2x 2x     2x 2x 2x             1812x 210x 1810x 1600x 1600x 1600x 1600x 6x 1600x 5x 2x 5x 1x 3x 2x 2x 5x 1597x 1600x 38x 38x 38x 38x 10x 10x 10x 10x 10x 38x 38x 38x 1x 1x 38x 1600x 1600x 1872x 1872x 1872x 1x 1x 1x 1x 1663x   1663x 9x 9x 1654x 1654x 1x 1x 1x 1971x 1971x 1848x 1848x 123x 123x 123x 1971x 77x 77x 77x 77x 123x 123x 123x 1971x 77x 77x 77x 77x 77x 77x 77x 6x 6x 6x     6x 6x 77x 71x 71x 71x 9x 9x 9x 71x 13x 13x 71x 71x 71x 71x 71x 71x 71x 71x 1x 1x 48x 48x 48x 1971x 46x 46x 46x 29x 29x 1x 1x 1x 29x 29x 28x 28x 28x 28x   28x 28x 28x 28x 29x 46x 17x 17x 46x     46x 22x 22x 46x     46x 78x 78x 1971x 29x 29x 1x 29x     28x 28x 28x 77x 77x 77x 1x 1x 19x     19x 19x 19x 19x 19x 8x 8x 8x 7x 7x 7x 1x 19x 11x 11x 11x 1x 1x 1x 1x 1x 1x 1x 1x   11x 10x 10x 6x 1x 6x 1x 5x 4x 4x 4x 4x 6x 4x 10x 10x 10x 10x 4x 4x 4x 3x 4x 1x 1x 1x 1x 1x               19x 1x 1x 222x     222x 222x 222x 221x 19x 19x 202x 221x 125x 125x 125x 125x 221x 78x 78x 222x 19x 222x     59x 222x 1x 1x 58x 222x 45x 45x 45x 13x 13x 13x 1x 1x 173x 173x 4x 4x 169x 173x 3x 3x 166x 166x 173x 151x 151x 15x 15x 15x 15x 15x       1x 1x 1599x 1599x 1x 1x 1598x 1598x 1x 1x 1600x 1600x 1600x 1600x 1x 1x 1599x 1600x 15x 15x 15x 15x             15x 1584x 1600x 1474x 1474x 110x 110x 1600x 104x 104x 6x 6x 1600x 2x 2x 4x 4x 4x 4x 4x 4x       1x 1x 125x 1x 1x 124x 125x 1x 125x 1x 1x 124x 124x 124x 1x 1x
/* eslint-disable default-case */
import {TypedIdentifier} from "../types/_typed_identifier";
import {StatementNode, ExpressionNode} from "../nodes";
import * as Expressions from "../2_statements/expressions";
import * as Statements from "../2_statements/statements";
import * as Types from "../types/basic";
import {CurrentScope} from "./_current_scope";
import {AbstractType} from "../types/basic/_abstract_type";
import {ScopeType} from "./_scope_type";
import {ObjectOriented} from "./_object_oriented";
import {ClassConstant} from "../types/class_constant";
import {Identifier as TokenIdentifier} from "../1_lexer/tokens/identifier";
import {ReferenceType} from "./_reference";
import {CharacterType, StructureType, TableAccessType, TableType, VoidType} from "../types/basic";
import {FieldChain} from "./expressions/field_chain";
import {ClassDefinition} from "../types";
import {FieldSub, TypeTableKey} from "../2_statements/expressions";
import {BuiltIn} from "./_builtin";
import {Position} from "../../position";
 
export class BasicTypes {
  private readonly filename: string;
  private readonly scope: CurrentScope;
 
  public constructor(filename: string, scope: CurrentScope) {
    this.filename = filename;
    this.scope = scope;
  }
 
  public lookupQualifiedName(name: string | undefined): TypedIdentifier | undefined {
// argh, todo, rewrite this entire method, more argh
    if (name === undefined) {
      return undefined;
    }
 
    const found = this.scope.findType(name);
    if (found) {
      return found;
    }
 
 
    if (name.includes("=>")) {
      const split = name.split("=>");
      const ooName = split[0];
      const typeName = split[1];
      const oo = this.scope.findObjectDefinition(ooName);
      if (oo) {
        if (typeName.includes("-")) {
          const split = typeName.split("-");
          const subTypeName = split[0];
          const fieldName = split[1];
          const stru = oo.getTypeDefinitions().getByName(subTypeName);
          const struType = stru?.getType();
          if (stru && struType instanceof StructureType) {
            const f = struType.getComponentByName(fieldName);
            if (f) {
              return new TypedIdentifier(stru.getToken(), stru.getFilename(), f);
            }
          }
        } else {
          const f = oo.getTypeDefinitions().getByName(typeName);
          if (f) {
            return f;
          }
        }
      }
    } else if (name.includes("-")) {
      const split = name.split("-");
      const typeName = split[0];
      const fieldName = split[1];
      const type = this.scope.findType(typeName);
      if (type) {
        const stru = type.getType();
        if (stru instanceof StructureType) {
          const f = stru.getComponentByName(fieldName);
          if (f) {
            return new TypedIdentifier(type.getToken(), type.getFilename(), f);
          }
        }
      }
    }
 
    const lookup = this.scope.getDDIC().lookupNoVoid(name);
    const id = lookup?.object?.getIdentifier();
    if (id && lookup?.type) {
      return new TypedIdentifier(id.getToken(), id.getFilename(), lookup.type);
    }
 
    const builtin = this.scope.getDDIC().lookupBuiltinType(name);
    if (builtin) {
      return new TypedIdentifier(new TokenIdentifier(new Position(1, 1), name), BuiltIn.filename, builtin);
    }
 
    const type = this.scope.findTypePoolType(name);
    if (type) {
      return type;
    }
 
    return undefined;
  }
 
  public resolveLikeName(node: ExpressionNode | StatementNode | undefined, headerLogic = true): AbstractType | undefined {
    if (node === undefined) {
      return undefined;
    }
 
    let chain = node.findFirstExpression(Expressions.FieldChain);
    if (chain === undefined) {
      chain = node.findFirstExpression(Expressions.TypeName);
    }
    if (chain === undefined) {
      chain = node.findFirstExpression(Expressions.FieldSub);
    }
    if (chain === undefined) {
      chain = node.findFirstExpression(Expressions.SimpleFieldChain);
    }
    if (chain === undefined) {
      throw new Error("resolveLikeName, chain undefined");
    }
    const fullName = chain.concatTokens();
    const children = [...chain.getChildren()];
 
    if (children.length === 0) {
      return new Types.UnknownType("Type error, could not resolve \"" + fullName + "\", resolveLikeName1");
    }
 
    let type: AbstractType | undefined = undefined;
    if (children[1] && ( children[1].getFirstToken().getStr() === "=>" || children[1].getFirstToken().getStr() === "->")) {
      type = new FieldChain().runSyntax(chain, this.scope, this.filename, ReferenceType.TypeReference);
    } else {
      const name = children.shift()!.getFirstToken().getStr();
      let found = this.scope.findVariable(name);
      type = found?.getType();
 
      if (found === undefined) {
        found = this.scope.findExtraLikeType(name);
        type = found?.getType();
      }
 
      if (found) {
        this.scope.addReference(chain?.getFirstToken(), found, ReferenceType.TypeReference, this.filename);
      }
 
      if (type === undefined) {
        type = this.scope.getDDIC().lookupNoVoid(name)?.type;
      }
 
      if (type === undefined && this.scope.isOO() === false && this.scope.getDDIC().inErrorNamespace(name) === false) {
        this.scope.addReference(chain.getChildren()[0].getFirstToken(), undefined, ReferenceType.VoidType, this.filename);
        return new Types.VoidType(name);
      }
 
      while (children.length > 0) {
        const child = children.shift()!;
 
        if (child.getFirstToken().getStr() === "-") {
          if (type instanceof Types.VoidType) {
            return type;
          }
        } else if (child.concatTokens() === "[]") {
          if (type instanceof Types.TableType) {
            type = new TableType(type.getRowType(), {withHeader: false});
          }
        } else { // field name
          let sub: AbstractType | undefined = undefined;
          if (type instanceof Types.TableType) {
            type = type.getRowType();
          }
          if (type instanceof Types.StructureType) {
            sub = type.getComponentByName(child.getFirstToken().getStr());
          }
          if (sub === undefined) {
            return new Types.UnknownType("Type error, field not part of structure " + fullName);
          }
          type = sub;
        }
      }
 
      if (type instanceof Types.VoidType) {
        return type;
      } else if (type instanceof TableType
          && type.isWithHeader()
          && headerLogic === true) {
        type = type.getRowType();
      } else if (type instanceof Types.TableType
          && type.isWithHeader() === true
          && type.getRowType() instanceof Types.VoidType) {
        return type.getRowType();
      }
    }
 
    if (!type) {
      return new Types.UnknownType("Type error, could not resolve \"" + fullName + "\", resolveLikeName2");
    }
 
    return type;
  }
 
  public resolveTypeName(typeName: ExpressionNode | undefined,
                         length?: number, decimals?: number, qualifiedName?: string): AbstractType | undefined {
 
    if (typeName === undefined) {
      return undefined;
    }
 
    let chain = this.resolveTypeChain(typeName);
    if (chain) {
      if (chain instanceof CharacterType && qualifiedName) {
        chain = chain.cloneType(qualifiedName);
      }
      return chain;
    }
 
    const chainText = typeName.concatTokens().toUpperCase();
    const f = this.scope.getDDIC().lookupBuiltinType(chainText, length, decimals, qualifiedName);
    if (f !== undefined) {
      return f;
    }
 
    const typ = this.scope.findType(chainText);
    if (typ) {
      const token = typeName.getFirstToken();
 
      if (chainText.includes("~")) {
        const name = chainText.split("~")[0];
        const idef = this.scope.findInterfaceDefinition(name);
        if (idef) {
          this.scope.addReference(token, idef, ReferenceType.ObjectOrientedReference, this.filename, {ooType: "INTF", ooName: name});
        }
      }
 
      this.scope.addReference(token, typ, ReferenceType.TypeReference, this.filename);
      return typ.getType();
    }
 
    const type = this.scope.findTypePoolType(chainText)?.getType();
    if (type) {
//      this.scope.addReference(typeName.getFirstToken(), type, ReferenceType.TypeReference, this.filename);
      return type;
    }
 
    const ddic = this.scope.getDDIC().lookup(chainText);
    if (ddic) {
      this.scope.getDDICReferences().addUsing(this.scope.getParentObj(),
                                              {object: ddic.object, token: typeName.getFirstToken(), filename: this.filename});
      if (ddic.type instanceof TypedIdentifier) {
        this.scope.addReference(typeName.getFirstToken(), ddic.type, ReferenceType.TypeReference, this.filename);
      } else if (ddic.type instanceof VoidType) {
        this.scope.addReference(typeName.getFirstToken(), undefined, ReferenceType.VoidType, this.filename);
      }
      return ddic.type;
    }

    return undefined;
  }
 
  public simpleType(node: StatementNode | ExpressionNode, qualifiedNamePrefix?: string): TypedIdentifier | undefined {
    let nameExpr = node.findFirstExpression(Expressions.NamespaceSimpleName);
    if (nameExpr === undefined) {
      nameExpr = node.findFirstExpression(Expressions.DefinitionName);
    }
    if (nameExpr === undefined) {
      return undefined;
    }
    let name = nameExpr.getFirstToken();
    if (nameExpr.countTokens() > 1) { // workaround for names with dashes
      name = new TokenIdentifier(name.getStart(), nameExpr.concatTokens());
    }
 
    let qualifiedName: string | undefined = undefined;
    if (node.get() instanceof Statements.Type) {
      if (this.scope.isTypePool() === true) {
        qualifiedName = name.getStr();
      } else {
        qualifiedName = ( qualifiedNamePrefix || "" ) + name.getStr();
        if (this.scope.getType() === ScopeType.ClassDefinition
            || this.scope.getType() === ScopeType.Interface) {
          qualifiedName = this.scope.getName() + "=>" + qualifiedName;
        }
      }
    } else if (qualifiedNamePrefix) {
      qualifiedName = qualifiedNamePrefix + qualifiedName;
    }
 
    const found = this.parseType(node, qualifiedName);
    if (found) {
      return new TypedIdentifier(name, this.filename, found);
    }

    return undefined;
  }
 
  public parseTable(node: ExpressionNode | StatementNode, name?: string): AbstractType | undefined {
    const typename = node.findFirstExpression(Expressions.TypeName);
    const text = node.findFirstExpression(Expressions.TypeTable)?.concatTokens().toUpperCase();
    if (text === undefined) {
      return undefined;
    }
 
    let type: Types.TableAccessType | undefined = undefined;
    if (text.includes(" STANDARD TABLE ")) {
      type = TableAccessType.standard;
    } else if (text.includes(" SORTED TABLE ")) {
      type = TableAccessType.sorted;
    } else if (text.includes(" HASHED TABLE ")) {
      type = TableAccessType.hashed;
    }
    const keyFields: string[] = [];
    if (type) {
      const keys = node.findFirstExpression(TypeTableKey);
      for (const k of keys?.findDirectExpressions(FieldSub) || []) {
        keyFields.push(k.concatTokens().toUpperCase());
      }
    }
    const options: Types.ITableOptions = {
      withHeader: text.includes(" WITH HEADER LINE"),
      type: type,
      isUnique: text.includes(" WITH UNIQUE"),
      keyFields: keyFields,
    };
 
    let found: AbstractType | undefined = undefined;
    if (text.startsWith("TYPE TABLE OF REF TO ")
        || text.startsWith("TYPE STANDARD TABLE OF REF TO ")
        || text.startsWith("TYPE SORTED TABLE OF REF TO ")
        || text.startsWith("TYPE HASHED TABLE OF REF TO ")) {
      found = this.resolveTypeRef(typename);
      if (found) {
        return new Types.TableType(found, options, name);
      }
    } else if (text.startsWith("TYPE TABLE OF ")
        || text.startsWith("TYPE STANDARD TABLE OF ")
        || text.startsWith("TYPE SORTED TABLE OF ")
        || text.startsWith("TYPE HASHED TABLE OF ")) {
      found = this.resolveTypeName(typename);
      if (found) {
        return new Types.TableType(found, options, name);
      }
    } else if (text.startsWith("LIKE TABLE OF ")
        || text.startsWith("LIKE STANDARD TABLE OF ")
        || text.startsWith("LIKE SORTED TABLE OF ")
        || text.startsWith("LIKE HASHED TABLE OF ")) {
      found = this.resolveLikeName(node);
      if (found) {
        return new Types.TableType(found, options, name);
      }
    } else if (text === "TYPE STANDARD TABLE"
        || text === "TYPE SORTED TABLE"
        || text === "TYPE HASHED TABLE"
        || text === "TYPE INDEX TABLE"
        || text === "TYPE ANY TABLE") {
      return new Types.TableType(new Types.AnyType(), options);
    } else if (text.startsWith("TYPE RANGE OF ")) {
      const sub = node.findFirstExpression(Expressions.TypeName);
      found = this.resolveTypeName(sub);
      if (found === undefined) {
        return new Types.UnknownType("TYPE RANGE OF, could not resolve type");
      }
      const structure = new Types.StructureType([
        {name: "sign", type: new Types.CharacterType(1)},
        {name: "option", type: new Types.CharacterType(2)},
        {name: "low", type: found},
        {name: "high", type: found},
      ]);
      return new Types.TableType(structure, options, name);
    } else if (text.startsWith("LIKE RANGE OF ")) {
      const sub = node.findFirstExpression(Expressions.SimpleFieldChain);
      found = this.resolveLikeName(sub);
      if (found === undefined) {
        return new Types.UnknownType("LIKE RANGE OF, could not resolve type");
      }
      const structure = new Types.StructureType([
        {name: "sign", type: new Types.CharacterType(1)},
        {name: "option", type: new Types.CharacterType(2)},
        {name: "low", type: found},
        {name: "high", type: found},
      ], name);
      return new Types.TableType(structure, options);
    }
 
    // fallback to old style syntax, OCCURS etc
    return this.parseType(node, name);
  }
 
  public parseType(node: ExpressionNode | StatementNode, qualifiedName?: string): AbstractType | undefined {
    const typeName = node.findFirstExpression(Expressions.TypeName);
 
    let text = node.findFirstExpression(Expressions.Type)?.concatTokens().toUpperCase();
    if (text === undefined) {
      text = node.findFirstExpression(Expressions.TypeParam)?.concatTokens().toUpperCase();
    }
    if (text === undefined) {
      text = node.findFirstExpression(Expressions.TypeTable)?.concatTokens().toUpperCase();
      if (text?.startsWith("TYPE") === false && text?.startsWith("LIKE") === false) {
        text = "TYPE";
      }
    }
    if (text === undefined) {
      text = node.findFirstExpression(Expressions.FormParamType)?.concatTokens().toUpperCase();
    }
    if (text === undefined) {
      text = "TYPE";
    }
 
    let found: AbstractType | undefined = undefined;
    if (text.startsWith("LIKE LINE OF ")) {
      const name = node.findFirstExpression(Expressions.FieldChain)?.concatTokens();
      let e = node.findFirstExpression(Expressions.Type);
      if (e === undefined) {
        e = node.findFirstExpression(Expressions.FormParamType);
      }
      const type = this.resolveLikeName(e, false);
 
      if (type === undefined) {
        return new Types.UnknownType("Type error, could not resolve \"" + name + "\", parseType");
      } else if (type instanceof Types.TableType) {
        return type.getRowType();
      } else if (type instanceof Types.VoidType) {
        return type;
      } else {
        return new Types.UnknownType("Type error, not a table type " + name);
      }
    } else if (text.startsWith("LIKE REF TO ")) {
      const name = node.findFirstExpression(Expressions.FieldChain)?.concatTokens();
      const type = this.resolveLikeName(node.findFirstExpression(Expressions.Type), false);
      if (type === undefined) {
        return new Types.UnknownType("Type error, could not resolve \"" + name + "\", parseType");
      }
      return new Types.DataReference(type, name);
    } else if (text === "TYPE STANDARD TABLE"
        || text === "TYPE SORTED TABLE"
        || text === "TYPE HASHED TABLE"
        || text === "TYPE INDEX TABLE"
        || text === "TYPE ANY TABLE") {
      return new Types.TableType(new Types.AnyType(), {withHeader: node.concatTokens().toUpperCase().includes("WITH HEADER LINE")});
    } else if (text.startsWith("LIKE ")) {
      let sub = node.findFirstExpression(Expressions.Type);
      if (sub === undefined) {
        sub = node.findFirstExpression(Expressions.FormParamType);
      }
      if (sub === undefined) {
        sub = node.findFirstExpression(Expressions.TypeParam);
      }
      if (sub === undefined) {
        sub = node.findFirstExpression(Expressions.FieldChain);
      }
      found = this.resolveLikeName(sub);
 
      if (found && this.isOccurs(node)) {
        found = new Types.TableType(found, {withHeader: text.includes("WITH HEADER LINE")}, qualifiedName);
      }
    } else if (text.startsWith("TYPE LINE OF ")) {
      const sub = node.findFirstExpression(Expressions.TypeName);
      found = this.resolveTypeName(sub);
      if (found instanceof TypedIdentifier) {
        found = found.getType();
      }
      if (found instanceof Types.TableType) {
        return found.getRowType();
      } else if (found instanceof Types.VoidType) {
        return found;
      } else if (found instanceof Types.UnknownType) {
        return new Types.UnknownType("TYPE LINE OF, unknown type, " + found.getError());
      } else {
        return new Types.UnknownType("TYPE LINE OF, unexpected type, " + found?.constructor.name);
      }
    } else if (text.startsWith("TYPE REF TO ")) {
      found = this.resolveTypeRef(typeName);
    } else if (text.startsWith("TYPE")) {
      found = this.resolveTypeName(typeName, this.findLength(node), this.findDecimals(node), qualifiedName);
 
      const concat = node.concatTokens().toUpperCase();
      if (found && this.isOccurs(node)) {
        found = new Types.TableType(found, {withHeader: concat.includes(" WITH HEADER LINE")}, qualifiedName);
      } else if (found && concat.includes(" WITH HEADER LINE")) {
        if (found instanceof Types.VoidType) {
          found = new Types.TableType(found, {withHeader: true});
        } else if (!(found instanceof Types.TableType)) {
          throw new Error("WITH HEADER LINE can only be used with internal table");
        } else {
          found = new Types.TableType(found.getRowType(), {withHeader: true});
        }
      }
 
      if (found === undefined && typeName === undefined) {
        let length = 1;
 
        const len = node.findDirectExpression(Expressions.ConstantFieldLength);
        if (len) {
          const int = len.findDirectExpression(Expressions.Integer);
          if (int) {
            length = parseInt(int.concatTokens(), 10);
          }
        }
 
        found = new Types.CharacterType(length, qualifiedName); // fallback
        if (this.isOccurs(node)) {
          found = new Types.TableType(found, {withHeader: concat.includes(" WITH HEADER LINE")}, qualifiedName);
        }
      }
 
    }
 
    return found;
  }
 
/////////////////////
 
  private isOccurs(node: ExpressionNode | StatementNode): boolean {
    if (node.findDirectTokenByText("OCCURS")) {
      return true;
    } else if (node.findFirstExpression(Expressions.TypeTable)?.findDirectTokenByText("OCCURS")) {
      return true;
    }
    return false;
  }
 
  // todo, rewrite this method
  private resolveTypeChain(expr: ExpressionNode): AbstractType | undefined {
    const chainText = expr.concatTokens().toUpperCase();
    if (chainText.includes("=>") === false && chainText.includes("-") === false) {
      return undefined;
    }
 
    let className: string | undefined;
    let rest = chainText;
    if (chainText.includes("=>")) {
      const split = chainText.split("=>");
      className = split[0];
      rest = split[1];
    }
    const subs = rest.split("-");
    let foundType: AbstractType | undefined = undefined;
 
    if (className) {
      const split = chainText.split("=>");
      const className = split[0];
 
    // the prefix might be itself
      if ((this.scope.getType() === ScopeType.Interface
          || this.scope.getType() === ScopeType.ClassDefinition)
          && this.scope.getName().toUpperCase() === className.toUpperCase()) {
        const foundId = this.scope.findType(subs[0]);
        foundType = foundId?.getType();
        if (foundType === undefined) {
          return new Types.UnknownType("Could not resolve type " + chainText);
        }
        this.scope.addReference(expr.getTokens()[2], foundId, ReferenceType.TypeReference, this.filename);
 
      } else {
    // lookup in local and global scope
        const obj = this.scope.findObjectDefinition(className);
        if (obj === undefined && this.scope.getDDIC().inErrorNamespace(className) === false) {
          this.scope.addReference(expr.getFirstToken(), undefined,
                                  ReferenceType.ObjectOrientedVoidReference, this.filename, {ooName: className.toUpperCase()});
          return new Types.VoidType(className);
        } else if (obj === undefined) {
          return new Types.UnknownType("Could not resolve top " + className + ", resolveTypeChain");
        }
        const type = obj instanceof ClassDefinition ? "CLAS" : "INTF";
 
        this.scope.addReference(expr.getFirstToken(), obj, ReferenceType.ObjectOrientedReference, this.filename,
                                {ooType: type, ooName: className});
 
        const byName = new ObjectOriented(this.scope).searchTypeName(obj, subs[0]);
        foundType = byName?.getType();
        if (byName === undefined || foundType === undefined) {
          return new Types.UnknownType(subs[0] + " not found in class or interface");
        }
        this.scope.addReference(expr.getTokens()[2], byName, ReferenceType.TypeReference, this.filename);
 
      }
    } else {
      const found = this.scope.findType(subs[0]);
      foundType = found?.getType();
      if (foundType === undefined) {
        const typePoolType = this.scope.findTypePoolType(subs[0])?.getType();
        if (typePoolType) {
//          this.scope.addReference(typeName.getFirstToken(), typePoolType, ReferenceType.TypeReference, this.filename);
          foundType = typePoolType;
        }
 
        if (foundType === undefined) {
          const f = this.scope.getDDIC().lookupTableOrView(subs[0]);
          this.scope.getDDICReferences().addUsing(this.scope.getParentObj(),
                                                  {object: f.object, filename: this.filename, token: expr.getFirstToken()});
          if (f.type instanceof TypedIdentifier) {
            foundType = f.type.getType();
          } else {
            foundType = f.type;
          }
        }
 
      } else {
        this.scope.addReference(expr.getFirstToken(), found, ReferenceType.TypeReference, this.filename);
      }
      if (foundType === undefined && this.scope.getDDIC().inErrorNamespace(subs[0]) === false) {
        this.scope.addReference(expr.getFirstToken(), undefined, ReferenceType.VoidType, this.filename);
        return new Types.VoidType(subs[0]);
      } else if (foundType instanceof Types.VoidType) {
        this.scope.addReference(expr.getFirstToken(), undefined, ReferenceType.VoidType, this.filename);
        return foundType;
      } else if (foundType === undefined) {
        return new Types.UnknownType("Unknown type " + subs[0]);
      }
    }
 
    subs.shift();
    while (subs.length > 0) {
      if (foundType instanceof Types.UnknownType
          || foundType instanceof Types.VoidType) {
        return foundType;
      } else if (!(foundType instanceof Types.StructureType)) {
        return new Types.UnknownType("Not a structured type");
      }
      foundType = foundType.getComponentByName(subs[0]);
      subs.shift();
    }
 
    return foundType;
  }
 
  private resolveConstantValue(expr: ExpressionNode): string | undefined {
    if (!(expr.get() instanceof Expressions.SimpleFieldChain)) {
      throw new Error("resolveConstantValue");
    }
 
    const firstNode = expr.getFirstChild()!;
    const firstToken = firstNode.getFirstToken();
    const firstName = firstToken.getStr();
    if (firstNode.get() instanceof Expressions.Field) {
      const found = this.scope.findVariable(firstName);
      const val = found?.getValue();
      if (typeof val === "string") {
        this.scope.addReference(firstToken, found, ReferenceType.DataReadReference, this.filename);
        return val;
      }
      return undefined;
    } else if (firstNode.get() instanceof Expressions.ClassName
        && firstName.toLowerCase() === this.scope.getName().toLowerCase()
        && (this.scope.getType() === ScopeType.Interface
        || this.scope.getType() === ScopeType.ClassDefinition)) {
      const children = expr.getChildren();
      const token = children[2]?.getFirstToken();
      const found = this.scope.findVariable(token.getStr());
      const val = found?.getValue();
      if (typeof val === "string") {
        this.scope.addReference(firstToken, found, ReferenceType.DataReadReference, this.filename);
        return val;
      }
      return undefined;
    } else if (firstNode.get() instanceof Expressions.ClassName) {
      const obj = this.scope.findObjectDefinition(firstName);
      if (obj === undefined) {
        if (this.scope.existsObject(firstName).found === true) {
          return undefined;
        } else if (this.scope.getDDIC().inErrorNamespace(firstName) === true) {
          throw new Error("resolveConstantValue, not found: " + firstName);
        } else {
          this.scope.addReference(firstNode.getFirstToken(), undefined,
                                  ReferenceType.ObjectOrientedVoidReference, this.filename, {ooName: firstName.toUpperCase()});
          return undefined;
        }
      }
      const children = expr.getChildren();
      const token = children[2]?.getFirstToken();
      const attr = token.getStr();
      const c = new ObjectOriented(this.scope).searchConstantName(obj, attr);
      if (c instanceof ClassConstant) {
        this.scope.addReference(token, c, ReferenceType.DataReadReference, this.filename);
        const val = c.getValue();
        if (typeof val === "string") {
          return val;
        } else if (typeof val === "object" && children[4]) {
          const name = children[4].getFirstToken().getStr();
          if (val[name] !== undefined) {
            return val[name];
          }
        }
        return undefined;
      }
      throw new Error("resolveConstantValue, constant not found " + attr);

    } else {
      throw new Error("resolveConstantValue, unexpected structure");
    }
  }
 
  private resolveTypeRef(chain: ExpressionNode | undefined): AbstractType | undefined {
    if (chain === undefined) {
      return undefined;
    }
 
    const name = chain.getFirstToken().getStr();
    if (chain.getAllTokens().length === 1) {
      if (name.toUpperCase() === "OBJECT") {
        return new Types.GenericObjectReferenceType();
      }
      const search = this.scope.existsObject(name);
      if (search.found === true && search.id) {
        this.scope.addReference(chain.getFirstToken(), search.id, ReferenceType.ObjectOrientedReference, this.filename,
                                {ooType: search.ooType, ooName: name});
        return new Types.ObjectReferenceType(search.id, name);
      }
    }
 
    const found = this.resolveTypeName(chain);
    if (found && !(found instanceof Types.UnknownType) && !(found instanceof Types.VoidType)) {
      return new Types.DataReference(found);
    } else if (chain.concatTokens().toUpperCase() === "DATA") {
      return new Types.DataReference(new Types.AnyType());
    }
 
    if (this.scope.isBadiDef(name) === true) {
      return new Types.VoidType(name);
    }
 
    if (this.scope.getDDIC()?.inErrorNamespace(name) === false) {
//      this.scope.addReference(chain.getFirstToken(), undefined, ReferenceType.VoidType, this.filename);
      return new Types.VoidType(name);
    }
 
    return new Types.UnknownType("REF, unable to resolve " + name);
  }
 
  public findValue(node: StatementNode): string | undefined {
    const val = node.findFirstExpression(Expressions.Value);
    if (val === undefined) {
      throw new Error("VALUE missing in expression");
    }
 
    if (val.concatTokens().toUpperCase() === "VALUE IS INITIAL") {
      return undefined;
    }
 
    const constant = val.findFirstExpression(Expressions.Constant);
    if (constant) {
      return constant.concatTokens();
    }
 
    const chain = val.findFirstExpression(Expressions.SimpleFieldChain);
    if (chain) {
      return this.resolveConstantValue(chain);
    }

    throw new Error("findValue, unexpected");
  }
 
  private findDecimals(node: StatementNode | ExpressionNode): number | undefined {
    const dec = node.findDirectExpression(Expressions.Decimals)?.findDirectExpression(Expressions.Integer)?.concatTokens();
    if (dec) {
      return parseInt(dec, 10);
    }
    return undefined;
  }
 
  private findLength(node: StatementNode | ExpressionNode): number | undefined {
    const val = node.findFirstExpression(Expressions.Length);
    const flen = node.findFirstExpression(Expressions.ConstantFieldLength);
 
    if (val && flen) {
      throw new Error("Only specify length once");
    }
 
    if (flen) {
      const cintExpr = flen.findFirstExpression(Expressions.Integer);
      if (cintExpr) {
        return this.parseInt(cintExpr.concatTokens());
      }

      const cchain = flen.findFirstExpression(Expressions.SimpleFieldChain);
      if (cchain) {
        const val = this.resolveConstantValue(cchain);
        return this.parseInt(val);
      }
    }
 
    if (val === undefined) {
      return 1;
    }
 
    const intExpr = val.findFirstExpression(Expressions.Integer);
    if (intExpr) {
      return this.parseInt(intExpr.concatTokens());
    }
 
    const strExpr = val.findFirstExpression(Expressions.ConstantString);
    if (strExpr) {
      return this.parseInt(strExpr.concatTokens());
    }
 
    const chain = val.findFirstExpression(Expressions.SimpleFieldChain);
    if (chain) {
      const val = this.resolveConstantValue(chain);
      return this.parseInt(val);
    }

    throw new Error("Unexpected, findLength");
  }
 
  private parseInt(text: string | undefined): number | undefined {
    if (text === undefined) {
      return undefined;
    }
 
    if (text.startsWith("'")) {
      text = text.split("'")[1];
    } else if (text.startsWith("`")) {
      text = text.split("`")[1];
    }
 
    return parseInt(text, 10);
  }
 
}