All files / src/abap/2_statements combi.ts

76.72% Statements 847/1104
92.72% Branches 153/165
45.45% Functions 70/154
76.72% Lines 847/1104

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 11041x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1882x 1882x 1x 1x     1x 1x     1x 1x 292944x 292944x 292944x 293169x 26107x 26107x 267062x 293169x 134691x 134691x 293169x 292944x 292944x 292944x 1x 1x     1x 1x     1x 1x     1x 1x 1x 1x 1x 1x 1x 397286x 397286x 1x 1x     1x 1x     1x 1x 885610x 885610x 885610x 889363x 889363x 95565x 95565x 95565x 889363x 885610x 885610x 1x 1x     1x 1x 17x 17x 1x 1x 949x 949x 1x 1x 1x 1x 1x 1x 1x 6111x 6111x 1x 1x     1x 1x     1x 1x 546287x 546287x 546287x 554443x 554443x 17722x 17722x 554443x 546287x 546287x 1x 1x                       1x 1x     1x 1x     1x 1x 1x 1x 1x 1x 1x 1x 1x 15119x 15119x 15119x 15119x 1x 1x     1x 1x 315374x 315374x 1x 315374x 70x 61x 70x 9x 9x 315373x 282548x 315303x 32755x 32755x 315374x 1x 1x     1x 1x                     1x 1x     1x 1x 37x 37x 1x 1x 1x 1x 1x 1x 1x 1x 8920x 8920x 8920x 1x 1x     1x 1x     1x 1x 10451x 10425x 10451x 26x 26x 10451x 1x 1x             1x 1x     1x 1x 496x 496x 1x 1x 1x 1x 1x 1x 1x 22130x 22130x 1x 1x     1x 1x     1x 1x 204711x 204711x 204711x 215917x 215917x 320x 215917x 207811x 215597x 7786x 7786x     215917x 204711x 204711x 204711x 1x 1x     1x 1x     1x 1x     1x 1x 1x 1x 1x 1x 1x 42970x 42970x 1x 1x     1x 1x     1x 1x 51159x 51159x 51159x 62022x 62022x 62022x 62022x 51157x 51157x 51157x 1x 1x     1x 1x 1x 1x 1x 1x     1x 1x 1x 1x 1x 1x 1x 9228x 9228x 1x 1x     1x 1x     1x 1x 29095x 29095x 29095x 29095x 29095x 29095x 35262x 35262x 35262x 35262x 29069x 29069x 6167x 6167x 6167x 29095x 26x 26x 26x     29069x 29069x 29069x 1x 1x     1x 1x 6x 6x 1x 1x     1x 1x 1x 1x 1x 1x 1x 599x 599x 1x 1x     1x 1x     1x 1x 26549x 26549x 26549x 26549x 26549x 26549x 29733x 29733x 29733x 29733x 26549x 1541x 1541x 1541x 1946x 1598x 1598x 1598x 1946x 1541x 26549x 26549x 3184x 3184x 3184x 26549x 26549x 26549x 1x 1x     1x 1x     1x 1x     1x 1x 1x 1x 1x 1x 1x 1x 6308x 6308x 6308x 1x 1x     1x 1x     1x 1x 5989x 5989x 1x 1x     1x 1x     1x 1x     1x 1x 1x 1x 1x 1x 1x 1x 30x 30x 30x 1x 1x     1x 1x     1x 1x 7566x 7566x 1x 1x     1x 1x     1x 1x     1x 1x 1x 1x 1x 1x 247186x     247186x 247186x 1x 1x             1x 1x     1x 1x 1435608x 1435608x 1435608x 1452299x 1452299x 1452299x 1948541x 1948541x 1259414x 1259414x 1259414x 1948541x 1452270x 1452299x 192856x 192856x 1452299x 1435579x 1435579x 1435579x 1x 1x       1x 1x 6x 6x 12x 12x 6x 6x 1x 1x 818x 818x 1x 1x 1x 1x 1x 1x 1x 1x 1x 83382x 83382x 83382x 83382x 83382x 83382x 214436x 214436x 214436x 83382x 83382x 1x 1x     1x 1x     1x 1x 192948x 192948x 1x 1x     1x 1x     1x 1x 371x 371x 1x 1x 774x 774x 774x 774x 764704x 764704x 764704x 690x 690x 764704x 764704x 774177x 774177x 774177x 252324x 252324x 250672x 250672x 250672x 337635x 337635x 337635x 337635x 337635x 337635x 250672x 250672x 250672x 250672x 250672x 250672x 250672x 252324x 252324x 774177x 774177x 764704x 764704x 764704x 774x 774x 774x 774x       774x 774x     774x 774x 88x 88x 774x 774x     774x 774x 7x 7x 774x 774x 9x 9x 774x 1x 1x 1x 1x 1x 17082x     17082x 17082x 1x 1x             1x 1x     1x 1x 20874x 20874x 20874x 20874x 149264x 149264x 8923x 8923x 8923x 8923x 8923x 8923x 360x 8923x 8563x 8563x 8923x 149264x 20874x 20874x 1x 1x       1x 1x       1x 1x     1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x     1x 1x     1x 1x 1x 1x 1x 1x     1x 1x     1x 1x     1x 1x 1x 1x 1x 1x     1x 1x     1x 1x 26x 26x 1x 1x     1x 1x     1x 1x     1x 1x 1x 1x 1x 1x 25048x     25048x 25048x 1x 1x             1x 1x     1x 1x 49747x 49747x 49747x 152189x 152189x 152189x 49721x 49721x 49721x 1x 1x       1x 1x             1x 1x 29x     29x 29x 29x     29x     29x 4x 4x 25x 25x 25x 1x 1x 1x 1x 1x 1x 1x 27072x     27072x 27072x 1x 1x             1x 1x     1x 1x 390145x 390145x 390145x 1308799x 1308799x 1308799x 1308799x 145229x 145229x 145229x 1308799x 390145x 390145x 390145x 1x 1x       1x 1x             1x 1x 18x 5x 5x 13x 13x 18x     18x 5x 5x 18x     8x 8x 8x 1x 1x 1x 1x 1x 1x 1x 1x                         1x 1x             1x 1x 1x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 45371x 33603x 18891x 18891x 33603x 45371x 1x 1x 1x     26479x 26479x 26479x 1x 1x 325825x 325825x 1x 1x 1x 1x 1x 266232x 266232x 83382x 266232x 182850x 182850x 266232x 1x 1882x 1882x 1882x 1x 6111x 6111x 6111x 1x 1x 1x 733206x 733206x 733206x 258349x 733206x 178087x 178087x 178087x 234x 234x 234x 178087x 474857x 296770x 296770x 733206x 157466x 157466x 157466x 157466x 157466x 25048x 25048x 25048x 25048x 25048x 27072x 27072x 27072x 27072x 27072x 42970x 42970x 42970x 22130x 22130x 22130x 8519x 8519x 8519x 8519x 8519x 2920x 2920x 2920x 569x 569x 569x 6308x 6308x 6308x 30x 30x 30x 15119x 15119x 15119x 8920x 8920x 8920x 223x 223x 223x 161x 161x 161x
import * as Tokens from "../1_lexer/tokens";
import {Token as Tokens_Token} from "../1_lexer/tokens/_token";
import {Position} from "../../position";
import {TokenNode, ExpressionNode, TokenNodeRegex} from "../nodes";
import {Version} from "../../version";
import {IStatementRunnable} from "./statement_runnable";
import {Result} from "./result";
 
class Regex implements IStatementRunnable {
 
  private readonly regexp: RegExp;
 
  public constructor(r: RegExp) {
    this.regexp = r;
  }
 
  public listKeywords(): string[] {
    return [];
  }
 
  public getUsing(): string[] {
    return [];
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    for (const input of r) {
      if (input.remainingLength() === 0) {
        continue;
      }
      const token = input.peek();
      if (this.regexp.test(token.getStr()) === true) {
        result.push(input.shift(new TokenNodeRegex(token)));
      }
    }
 
    return result;
  }
 
  public railroad() {
    return "Railroad.Terminal(\"" + this.regexp.source.replace(/\\/g, "\\\\") + "\")";
  }
 
  public toStr() {
    return this.regexp.toString();
  }
 
  public first() {
    return [""];
  }
}
 
class Word implements IStatementRunnable {
 
  private readonly s: string;
 
  public constructor(s: string) {
    this.s = s.toUpperCase();
  }
 
  public listKeywords(): string[] {
    return [this.s];
  }
 
  public getUsing(): string[] {
    return [];
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    for (const input of r) {
      if (input.remainingLength() !== 0
          && input.peek().getStr().toUpperCase() === this.s) {
//        console.log("match, " + this.s + result.length);
        result.push(input.shift(new TokenNode(input.peek())));
      }
    }
    return result;
  }
 
  public railroad() {
    return "Railroad.Terminal('\"" + this.s + "\"')";
  }
 
  public toStr() {
    return "\"" + this.s + "\"";
  }
 
  public first() {
    return [this.s];
  }
}
 
class Token implements IStatementRunnable {
 
  private readonly name: string;
 
  public constructor(s: string) {
    this.name = s.toUpperCase();
  }
 
  public listKeywords(): string[] {
    return [];
  }
 
  public getUsing(): string[] {
    return [];
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    for (const input of r) {
      if (input.remainingLength() !== 0
          && input.peek().constructor.name.toUpperCase() === this.name) {
        result.push(input.shift(new TokenNode(input.peek())));
      }
    }
    return result;
  }
 
  public railroad() {
    let text = this.name;

    const toke: any = Tokens;
    for (const token in Tokens) {
      if (token.toUpperCase() === this.name && toke[token].railroad) {
        text = toke[token].railroad();
        break;
      }
    }
    return "Railroad.Terminal('!\"" + text + "\"')";
  }
 
  public toStr() {
    return "Token \"" + this.name + "\"";
  }
 
  public first() {
    return [""];
  }
}
 
class Vers implements IStatementRunnable {
 
  private readonly version: Version;
  private readonly or: Version | undefined;
  private readonly runnable: IStatementRunnable;
 
  public constructor(version: Version, runnable: IStatementRunnable, or?: Version) {
    this.version = version;
    this.runnable = runnable;
    this.or = or;
  }
 
  public listKeywords(): string[] {
    return this.runnable.listKeywords();
  }
 
  public run(r: Result[]): Result[] {
    const targetVersion = Combi.getVersion();
    if (this.or && targetVersion === this.or) {
      return this.runnable.run(r);
    } else if (targetVersion === Version.OpenABAP) {
      if (this.version > Version.v702) {
        return [];
      } else {
        return this.runnable.run(r);
      }
    } else if (targetVersion >= this.version || targetVersion === Version.Cloud) {
      return this.runnable.run(r);
    } else {
      return [];
    }
  }
 
  public getUsing(): string[] {
    return this.runnable.getUsing();
  }
 
  public railroad() {
    let text: string = this.version;
    if (this.or) {
      text += " or " + this.or;
    }
    return "Railroad.Sequence(Railroad.Comment(\"" +
      text +
      "\", {}), " +
      this.runnable.railroad() +
      ")";
  }
 
  public toStr() {
    return "Version(" + this.runnable.toStr() + ")";
  }
 
  public first() {
    return this.runnable.first();
  }
}
 
class VersNot implements IStatementRunnable {
 
  private readonly version: Version;
  private readonly runnable: IStatementRunnable;
 
  public constructor(version: Version, runnable: IStatementRunnable) {
    this.version = version;
    this.runnable = runnable;
  }
 
  public listKeywords(): string[] {
    return this.runnable.listKeywords();
  }
 
  public getUsing(): string[] {
    return this.runnable.getUsing();
  }
 
  public run(r: Result[]): Result[] {
    if (Combi.getVersion() !== this.version) {
      return this.runnable.run(r);
    } else {
      return [];
    }
  }
 
  public railroad() {
    return "Railroad.Sequence(Railroad.Comment(\"not " +
      this.version +
      "\", {}), " +
      this.runnable.railroad() +
      ")";
  }
 
  public toStr() {
    return "VersionNot(" + this.runnable.toStr() + ")";
  }
 
  public first() {
    return this.runnable.first();
  }
}
 
class OptionalPriority implements IStatementRunnable {
 
  private readonly optional: IStatementRunnable;
 
  public constructor(optional: IStatementRunnable) {
    this.optional = optional;
  }
 
  public listKeywords(): string[] {
    return this.optional.listKeywords();
  }
 
  public getUsing(): string[] {
    return this.optional.getUsing();
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    for (const input of r) {
      const res = this.optional.run([input]);
      if (res.length > 1) {
        result.push(...res);
      } else if (res.length === 0) {
        result.push(input);
      } else if (res[0].remainingLength() < input.remainingLength()) {
        result.push(...res);
      } else {
        result.push(input);
      }
    }
 
    return result;
  }
 
  public railroad() {
    return "Railroad.Optional(" + this.optional.railroad() + ")";
  }
 
  public toStr() {
    return "opt(" + this.optional.toStr() + ")";
  }
 
  public first() {
    return [""];
  }
}
 
class Optional implements IStatementRunnable {
 
  private readonly optional: IStatementRunnable;
 
  public constructor(optional: IStatementRunnable) {
    this.optional = optional;
  }
 
  public listKeywords(): string[] {
    return this.optional.listKeywords();
  }
 
  public getUsing(): string[] {
    return this.optional.getUsing();
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    for (const input of r) {
      result.push(input);
      const res = this.optional.run([input]);
      result.push(...res);
    }
 
    return result;
  }
 
  public railroad() {
    return "Railroad.Optional(" + this.optional.railroad() + ")";
  }
 
  public toStr() {
    return "opt(" + this.optional.toStr() + ")";
  }
 
  public first() {
    return [""];
  }
}
 
class Star implements IStatementRunnable {
 
  private readonly sta: IStatementRunnable;
 
  public constructor(sta: IStatementRunnable) {
    this.sta = sta;
  }
 
  public listKeywords(): string[] {
    return this.sta.listKeywords();
  }
 
  public getUsing(): string[] {
    return this.sta.getUsing();
  }
 
  public run(r: Result[]): Result[] {
    const result = r;
 
    try {
      let res = r;
      let input: Result[] = [];
      for (;;) {
        input = res;
        res = this.sta.run(input);
 
        if (res.length === 0) {
          break;
        }
 
        result.push(...res);
      }
    } catch (err) {
      if (err instanceof FailStarError) {
        return result;
      }
      throw err;
    }
//    console.dir(result);
    return result;
  }
 
  public railroad() {
    return "Railroad.ZeroOrMore(" + this.sta.railroad() + ")";
  }
 
  public toStr() {
    return "star(" + this.sta.toStr() + ")";
  }
 
  public first() {
    return [""];
  }
}
 
class StarPrioroity implements IStatementRunnable {
 
  private readonly sta: IStatementRunnable;
 
  public constructor(sta: IStatementRunnable) {
    this.sta = sta;
  }
 
  public listKeywords(): string[] {
    return this.sta.listKeywords();
  }
 
  public getUsing(): string[] {
    return this.sta.getUsing();
  }
 
  public run(r: Result[]): Result[] {
    let result: Result[] = r;
 
    let res = r;
//    let input: Result[] = [];
    let prev: Result[] | undefined;
    for (;;) {
//      input = res;
      res = this.sta.run(res);
 
      if (res.length === 0) {
        if (prev !== undefined) {
//          console.log("star length: " + prev.length);
          let best = Number.MAX_SAFE_INTEGER;
          for (const p of prev) {
            if (p.remainingLength() < best) {
              result = [p];
              best = p.remainingLength();
            }
          }
        }
        break;
      }
 
      prev = res;
    }
 
    return result;
  }
 
  public railroad() {
    return "Railroad.ZeroOrMore(" + this.sta.railroad() + ")";
  }
 
  public toStr() {
    return "star(" + this.sta.toStr() + ")";
  }
 
  public first() {
    return [""];
  }
}
 
class Plus implements IStatementRunnable {
 
  private readonly plu: IStatementRunnable;
  private readonly sub: Sequence;
 
  public constructor(plu: IStatementRunnable) {
    this.plu = plu;
    this.sub = new Sequence([this.plu, new Star(this.plu)]);
  }
 
  public listKeywords(): string[] {
    return this.plu.listKeywords();
  }
 
  public getUsing(): string[] {
    return this.plu.getUsing();
  }
 
  public run(r: Result[]): Result[] {
    return this.sub.run(r);
  }
 
  public railroad() {
    return "Railroad.OneOrMore(" + this.plu.railroad() + ")";
  }
 
  public toStr() {
    return "plus(" + this.plu.toStr() + ")";
  }
 
  public first() {
    return this.plu.first();
  }
}
 
class PlusPriority implements IStatementRunnable {
 
  private readonly plu: IStatementRunnable;
  private readonly sub: Sequence;
 
  public constructor(plu: IStatementRunnable) {
    this.plu = plu;
    this.sub = new Sequence([this.plu, new StarPrioroity(this.plu)]);
  }
 
  public listKeywords(): string[] {
    return this.plu.listKeywords();
  }
 
  public getUsing(): string[] {
    return this.plu.getUsing();
  }
 
  public run(r: Result[]): Result[] {
    return this.sub.run(r);
  }
 
  public railroad() {
    return "Railroad.OneOrMore(" + this.plu.railroad() + ")";
  }
 
  public toStr() {
    return "plus(" + this.plu.toStr() + ")";
  }
 
  public first() {
    return this.plu.first();
  }
}
 
class Sequence implements IStatementRunnable {
  private readonly list: IStatementRunnable[];
 
  public constructor(list: IStatementRunnable[]) {
    if (list.length < 2) {
      throw new Error("Sequence, length error");
    }
    this.list = list;
  }
 
  public listKeywords(): string[] {
    const ret: string[] = [];
    for (const i of this.list) {
      ret.push(...i.listKeywords());
    }
    return ret;
  }
 
  public getUsing(): string[] {
    return this.list.reduce((a, c) => { return a.concat(c.getUsing()); }, [] as string[]);
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    for (const input of r) {
      let temp = [input];
      let match = true;
      for (const sequence of this.list) {
        temp = sequence.run(temp);
        if (temp.length === 0) {
          match = false;
          break;
        }
      }
 
      if (match === true) {
        result.push(...temp);
      }
    }
 
    return result;
  }
 
  public railroad() {
    const children = this.list.map((e) => { return e.railroad(); });
    return "Railroad.Sequence(" + children.join() + ")";
  }
 
  public toStr() {
    let ret = "";
    for (const i of this.list) {
      ret = ret + i.toStr() + ",";
    }
    return "seq(" + ret + ")";
  }
 
  public first() {
    return this.list[0].first();
  }
}
 
class WordSequence implements IStatementRunnable {
 
  private readonly stri: string;
  private readonly words: IStatementRunnable[] = [];
  private readonly seq: Sequence;
 
  public constructor(stri: string) {
    this.stri = stri;
 
    const foo = this.stri.replace(/-/g, " - ");
    const split = foo.split(" ");
 
    for (const st of split) {
// todo, use Dash token
      this.words.push(new Word(st));
    }
    this.seq = new Sequence(this.words);
  }
 
  public listKeywords(): string[] {
    return [this.stri.toString()];
  }
 
  public getUsing(): string[] {
    return [];
  }
 
  public run(r: Result[]): Result[] {
    return this.seq.run(r);
  }
 
  public railroad() {
    return "Railroad.Terminal('\"" + this.stri + "\"')";
  }
 
  public toStr() {
    return "str(" + this.stri + ")";
  }
 
  public first() {
    return this.words[0].first();
  }
}
 
export abstract class Expression implements IStatementRunnable {
  private runnable: IStatementRunnable | undefined = undefined;
 
  public run(r: Result[]): Result[] {
    const results: Result[] = [];
 
    if (this.runnable === undefined) {
      this.runnable = this.getRunnable();
    }
 
    for (const input of r) {
      const temp = this.runnable.run([input]);
 
      for (const t of temp) {
        let consumed = input.remainingLength() - t.remainingLength();
        if (consumed > 0) {
          const originalLength = t.getNodes().length;
          const children: (ExpressionNode | TokenNode)[] = [];
          while (consumed > 0) {
            const sub = t.popNode();
            if (sub) {
              children.push(sub);
              consumed = consumed - sub.countTokens();
            }
          }
          const re = new ExpressionNode(this);
          re.setChildren(children.reverse());
 
          const n = t.getNodes().slice(0, originalLength - consumed);
          n.push(re);
          t.setNodes(n);
        }
        results.push(t);
      }
 
    }
//    console.dir(results);
    return results;
  }
 
  public abstract getRunnable(): IStatementRunnable;
 
  public listKeywords(): string[] {
// do not recurse, all Expressions are evaluated only on first level
    return [];
  }
 
  public getUsing(): string[] {
    return ["expression/" + this.getName()];
  }
 
  public getName(): string {
    return this.constructor.name;
  }
 
  public railroad() {
    return "Railroad.NonTerminal('" + this.getName() + "', {href: '#/expression/" + this.getName() + "'})";
  }
 
  public toStr() {
    return "expression(" + this.getName() + ")";
  }
 
  public first() {
    return this.getRunnable().first();
  }
}
 
class Permutation implements IStatementRunnable {
  private readonly list: IStatementRunnable[];
 
  public constructor(list: IStatementRunnable[]) {
    if (list.length < 2) {
      throw new Error("Permutation, length error, got " + list.length);
    }
    this.list = list;
  }
 
  public listKeywords(): string[] {
    const ret: string[] = [];
    for (const i of this.list) {
      ret.push(...i.listKeywords());
    }
    return ret;
  }
 
  public getUsing() {
    return this.list.reduce((a, c) => { return a.concat(c.getUsing()); }, [] as string[]);
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    const copy = this.list.slice();
    for (let index = 0; index < this.list.length; index++) {
      const temp = this.list[index].run(r);
      if (temp.length !== 0) {
// match
        result.push(...temp);
 
        const left = copy;
        left.splice(index, 1);
        if (left.length === 1) {
          result.push(...left[0].run(temp));
        } else {
          result.push(...new Permutation(left).run(temp));
        }
      }
    }
    return result;
  }
 
  public railroad() {
    const children = this.list.map((e) => { return e.railroad(); });
    return "Railroad.MultipleChoice(0, 'any'," + children.join() + ")";
  }
 
  public toStr() {
    const children = this.list.map((e) => { return e.toStr(); });
    return "per(" + children.join() + ")";
  }
 
  public first() {
    return [""];
  }
}
 
class FailCombinatorError extends Error {
 
}
 
class FailStarError extends Error {
 
}
 
class FailCombinator implements IStatementRunnable {
 
  public listKeywords(): string[] {
    return [];
  }
 
  public getUsing() {
    return [];
  }
 
  public run(_r: Result[]): Result[] {
    throw new FailCombinatorError();
  }
 
  public railroad() {
    return "Railroad.Terminal('!FailCombinator')";
  }
 
  public toStr() {
    return "fail()";
  }
 
  public first() {
    return [];
  }
}
 
// Note that Plus is implemented with Star
class FailStar implements IStatementRunnable {
 
  public listKeywords(): string[] {
    return [];
  }
 
  public getUsing() {
    return [];
  }
 
  public run(_r: Result[]): Result[] {
    throw new FailStarError();
  }
 
  public railroad() {
    return "Railroad.Terminal('!FailStar')";
  }
 
  public toStr() {
    return "fail()";
  }
 
  public first() {
    return [];
  }
}
 
class Alternative implements IStatementRunnable {
  private readonly list: IStatementRunnable[];
 
  public constructor(list: IStatementRunnable[]) {
    if (list.length < 2) {
      throw new Error("Alternative, length error");
    }
    this.list = list;
  }
 
  public listKeywords(): string[] {
    const ret: string[] = [];
    for (const i of this.list) {
      ret.push(...i.listKeywords());
    }
    return ret;
  }
 
  public getUsing() {
    return this.list.reduce((a, c) => { return a.concat(c.getUsing()); }, [] as string[]);
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    for (const sequ of this.list) {
      const temp = sequ.run(r);
      result.push(...temp);
    }
 
    return result;
  }
 
  public railroad() {
    const children = this.list.map((e) => { return e.railroad(); });
    return "Railroad.Choice(0, " + children.join() + ")";
  }
 
  public toStr() {
    let ret = "";
    for (const i of this.list) {
      ret = ret + i.toStr() + ",";
    }
    return "alt(" + ret + ")";
  }
 
  public first() {
    if (this.list.length !== 2) {
      return [""];
    }
    const f1 = this.list[0].first();
    const f2 = this.list[1].first();
    if (f1.length === 1 && f1[0] === "") {
      return f1;
    }
    if (f2.length === 1 && f2[0] === "") {
      return f2;
    }
    if (f1.length === 1 && f2.length === 1 && f1[0] === f2[0]) {
      return f1;
    }
    f1.push(...f2);
    return f1;
  }
}
 
// prioritized alternative, skip others if match found
class AlternativePriority implements IStatementRunnable {
  private readonly list: IStatementRunnable[];
 
  public constructor(list: IStatementRunnable[]) {
    if (list.length < 2) {
      throw new Error("Alternative, length error");
    }
    this.list = list;
  }
 
  public listKeywords(): string[] {
    const ret: string[] = [];
    for (const i of this.list) {
      ret.push(...i.listKeywords());
    }
    return ret;
  }
 
  public getUsing() {
    return this.list.reduce((a, c) => { return a.concat(c.getUsing()); }, [] as string[]);
  }
 
  public run(r: Result[]): Result[] {
    const result: Result[] = [];
 
    for (const sequ of this.list) {
//      console.log(seq.toStr());
      const temp = sequ.run(r);
 
      if (temp.length > 0) {
        result.push(...temp);
        break;
      }
    }
 
    return result;
  }
 
  public railroad() {
    const children = this.list.map((e) => { return e.railroad(); });
    return "Railroad.Choice(0, " + children.join() + ")";
  }
 
  public toStr() {
    let ret = "";
    for (const i of this.list) {
      ret = ret + i.toStr() + ",";
    }
    return "alt(" + ret + ")";
  }
 
  public first() {
    if (this.list.length !== 2) {
      return [""];
    }
    const f1 = this.list[0].first();
    const f2 = this.list[1].first();
    if (f1.length === 1 && f1[0] === "") {
      return f1;
    }
    if (f2.length === 1 && f2[0] === "") {
      return f2;
    }
    if (f1.length === 1 && f2.length === 1 && f1[0] === f2[0]) {
      return f1;
    }
    f1.push(...f2);
    return f1;
  }
}
 
export class Combi {
// todo, change this class to be instantiated, constructor(runnable) ?
 
  private static ver: Version;
 
  public static railroad(runnable: IStatementRunnable, complex = false): string {
// todo, move method to graph.js?
    let type = "Railroad.Diagram(";
    if (complex === true) {
      type = "Railroad.ComplexDiagram(";
    }

    const result = "Railroad.Diagram.INTERNAL_ALIGNMENT = 'left';\n" +
      type +
      runnable.railroad() +
      ").toString();";
    return result;
  }
 
  public static listKeywords(runnable: IStatementRunnable): string[] {
// todo, move these walkers of the syntax tree to some abstraction?
    let res = runnable.listKeywords();
// remove duplicates
    res = res.filter((x, i, a) => { return a.indexOf(x) === i; });
    return res;
  }
 
// assumption: no pragmas supplied in tokens input
  public static run(
    runnable: IStatementRunnable,
    tokens: readonly Tokens_Token[], version: Version): (ExpressionNode | TokenNode)[] | undefined {
 
    this.ver = version;
 
    const input = new Result(tokens, 0);
    try {
      const result = runnable.run([input]);
/*
    console.log("res: " + result.length);
    for (const res of result) {
      console.dir(res.getNodes().map(n => n.get().constructor.name));
      console.dir(res.getNodes().map(n => n.concatTokens()));
    }
*/
      for (const res of result) {
        if (res.remainingLength() === 0) {
          return res.getNodes();
        }
      }
    } catch (err) {
      if (err instanceof FailCombinatorError) {
        return undefined;
      }
      throw err;
    }
 
    return undefined;
  }
 
  public static getVersion(): Version {
    return this.ver;
  }
 
}
 
// -----------------------------------------------------------------------------
 
export function str(s: string): IStatementRunnable {
  if (s.indexOf(" ") > 0 || s.indexOf("-") > 0) {
    return new WordSequence(s);
  } else {
    return new Word(s);
  }
}
 
export function regex(r: RegExp): IStatementRunnable {
  return new Regex(r);
}
 
export function tok(t: new (p: Position, s: string) => any): IStatementRunnable {
  return new Token(t.name);
}
 
const singletons: {[index: string]: Expression} = {};
type InputType = (new () => Expression) | string | IStatementRunnable;
function map(s: InputType): IStatementRunnable {
  const type = typeof s;
  if (type === "string") {
    return str(s as string);
  } else if (type === "function") {
    // @ts-ignore
    const name = s.name;
    if (singletons[name] === undefined) {
      // @ts-ignore
      singletons[name] = new s();
    }
    return singletons[name];
  } else {
    return s as IStatementRunnable;
  }
}
export function seq(first: InputType, second: InputType, ...rest: InputType[]): IStatementRunnable {
  const list = [map(first), map(second)];
  list.push(...rest.map(map));
  return new Sequence(list);
}
export function alt(first: InputType, second: InputType, ...rest: InputType[]): IStatementRunnable {
  const list = [map(first), map(second)];
  list.push(...rest.map(map));
  return new Alternative(list);
}
export function altPrio(first: InputType, second: InputType, ...rest: InputType[]): IStatementRunnable {
  const list = [map(first), map(second)];
  list.push(...rest.map(map));
  return new AlternativePriority(list);
}
export function opt(first: InputType): IStatementRunnable {
  return new Optional(map(first));
}
export function optPrio(first: InputType): IStatementRunnable {
  return new OptionalPriority(map(first));
}
export function per(first: InputType, second: InputType, ...rest: InputType[]): IStatementRunnable {
  const list = [map(first), map(second)];
  list.push(...rest.map(map));
  return new Permutation(list);
}
export function star(first: InputType): IStatementRunnable {
  return new Star(map(first));
}
export function starPrio(first: InputType): IStatementRunnable {
  return new StarPrioroity(map(first));
}
export function plus(first: InputType): IStatementRunnable {
  return new Plus(map(first));
}
export function plusPrio(first: InputType): IStatementRunnable {
  return new PlusPriority(map(first));
}
export function ver(version: Version, first: InputType, or?: Version): IStatementRunnable {
  return new Vers(version, map(first), or);
}
export function verNot(version: Version, first: InputType): IStatementRunnable {
  return new VersNot(version, map(first));
}
export function failCombinator(): IStatementRunnable {
  return new FailCombinator();
}
export function failStar(): IStatementRunnable {
  return new FailStar();
}