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CompilerConstruction-ex4
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CompilerConstruction-ex4/vsl_programs/lexical.tree

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  1.  PROGRAM

  2.  GLOBAL_LIST

  3.   FUNCTION

  4.    IDENTIFIER_DATA(main)

  5.    (nil)

  6.    BLOCK

  7.     DECLARATION_LIST

  8.      DECLARATION

  9.       VARIABLE_LIST

  10.        IDENTIFIER_DATA(a)

  11.        IDENTIFIER_DATA(_a1)

  12.        IDENTIFIER_DATA(a_2)

  13.     STATEMENT_LIST

  14.      PRINT_STATEMENT

  15.       STRING_DATA("Hello, world!")

  16.      PRINT_STATEMENT

  17.       STRING_DATA("")

  18.      PRINT_STATEMENT

  19.       STRING_DATA("Hello, \"world\"!")

  20.      ASSIGNMENT_STATEMENT

  21.       IDENTIFIER_DATA(_a1)

  22.       NUMBER_DATA(10)

  23.      ASSIGNMENT_STATEMENT

  24.       IDENTIFIER_DATA(a_2)

  25.       NUMBER_DATA(2)

  26.      ASSIGNMENT_STATEMENT

  27.       IDENTIFIER_DATA(a)

  28.       EXPRESSION(+)

  29.        IDENTIFIER_DATA(_a1)

  30.        IDENTIFIER_DATA(a_2)

  31.      PRINT_STATEMENT

  32.       IDENTIFIER_DATA(_a1)

  33.       STRING_DATA("+")

  34.       IDENTIFIER_DATA(a_2)

  35.       STRING_DATA(":=")

  36.       IDENTIFIER_DATA(a)

  37.      ASSIGNMENT_STATEMENT

  38.       IDENTIFIER_DATA(a)

  39.       EXPRESSION(-)

  40.        IDENTIFIER_DATA(_a1)

  41.        IDENTIFIER_DATA(a_2)

  42.      PRINT_STATEMENT

  43.       IDENTIFIER_DATA(_a1)

  44.       STRING_DATA("-")

  45.       IDENTIFIER_DATA(a_2)

  46.       STRING_DATA(":=")

  47.       IDENTIFIER_DATA(a)

  48.      ASSIGNMENT_STATEMENT

  49.       IDENTIFIER_DATA(a)

  50.       EXPRESSION(+)

  51.        IDENTIFIER_DATA(_a1)

  52.        EXPRESSION(-)

  53.         IDENTIFIER_DATA(a_2)

  54.      PRINT_STATEMENT

  55.       IDENTIFIER_DATA(_a1)

  56.       STRING_DATA("+ (-")

  57.       IDENTIFIER_DATA(a_2)

  58.       STRING_DATA(") :=")

  59.       IDENTIFIER_DATA(a)

  60.      ASSIGNMENT_STATEMENT

  61.       IDENTIFIER_DATA(a)

  62.       EXPRESSION(*)

  63.        IDENTIFIER_DATA(_a1)

  64.        IDENTIFIER_DATA(a_2)

  65.      PRINT_STATEMENT

  66.       IDENTIFIER_DATA(_a1)

  67.       STRING_DATA("*")

  68.       IDENTIFIER_DATA(a_2)

  69.       STRING_DATA(":=")

  70.       IDENTIFIER_DATA(a)

  71.      ASSIGNMENT_STATEMENT

  72.       IDENTIFIER_DATA(a)

  73.       EXPRESSION(/)

  74.        IDENTIFIER_DATA(_a1)

  75.        IDENTIFIER_DATA(a_2)

  76.      PRINT_STATEMENT

  77.       IDENTIFIER_DATA(_a1)

  78.       STRING_DATA("/")

  79.       IDENTIFIER_DATA(a_2)

  80.       STRING_DATA(":=")

  81.       IDENTIFIER_DATA(a)

  82.      IF_STATEMENT

  83.       RELATION

  84.        IDENTIFIER_DATA(a)

  85.        NUMBER_DATA(0)

  86.       PRINT_STATEMENT

  87.        IDENTIFIER_DATA(a)

  88.      WHILE_STATEMENT

  89.       RELATION

  90.        IDENTIFIER_DATA(a)

  91.        NUMBER_DATA(0)

  92.       BLOCK

  93.        STATEMENT_LIST

  94.         IF_STATEMENT

  95.          RELATION

  96.           EXPRESSION(-)

  97.            IDENTIFIER_DATA(a)

  98.            NUMBER_DATA(3)

  99.           NUMBER_DATA(0)

  100.          ASSIGNMENT_STATEMENT

  101.           IDENTIFIER_DATA(a)

  102.           EXPRESSION(-)

  103.            IDENTIFIER_DATA(a)

  104.            NUMBER_DATA(1)

  105.          BLOCK

  106.           STATEMENT_LIST

  107.            ASSIGNMENT_STATEMENT

  108.             IDENTIFIER_DATA(a)

  109.             EXPRESSION(-)

  110.              IDENTIFIER_DATA(a)

  111.              NUMBER_DATA(1)

  112.            PRINT_STATEMENT

  113.             STRING_DATA("Skip...")

  114.            NULL_STATEMENT

  115.         PRINT_STATEMENT

  116.          IDENTIFIER_DATA(a)

  117.      RETURN_STATEMENT

  118.       NUMBER_DATA(0)