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File MIME type: text/x-ascend

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Setting up web subdirectory in repository

1 | REQUIRE "system.a4l"; |

2 | (* => system.a4l, basemodel.a4l *) |

3 | PROVIDE "z-emptyfor.a4c"; |

4 | (* |

5 | * This file is part of the ASCEND Modeling Library and is released |

6 | * under the GNU Public License as described at the end of this file. |

7 | *) |

8 | (* |

9 | * This file demonstrates how associative arrays of variables and relations |

10 | * are handled in the case of definition over the empty set. |

11 | * In version ascend IV 0.8 and all previous C versions, the handling |

12 | * is inconsistent between FOR and non-FOR defined structures. |

13 | * |

14 | * The specified behavior is: |

15 | * - all cases marked (* empty *) here should compile an empty array stub. |

16 | * - all other cases should compile an array of the specified object even if, |

17 | * as in the case of ra1 and ra2, that object is not mathematically |

18 | * sensible. Productions such as ra1,ra2 should be allowed but warned |

19 | * about vociferously. |

20 | * |

21 | * An action plan to bring the compiler up to the specification is not yet |

22 | * in place, especially since the entire implementation strategy for |

23 | * associative arrays and FOR statements needs to be redesigned due to |

24 | * other problems in compiler instruction scheduling. |

25 | *) |

26 | |

27 | MODEL varfor; |

28 | a[1..2] IS_A real; |

29 | b[2..1] IS_A real; (* empty_*) |

30 | FOR i IN [1..2] CREATE |

31 | c[i] IS_A real; |

32 | END FOR; |

33 | |

34 | FOR i IN [2..1] CREATE |

35 | d[i] IS_A real; (* empty *) |

36 | END FOR; |

37 | END varfor; |

38 | |

39 | MODEL badrelfor; |

40 | (* not allowed to have array of unindexed eqns. *) |

41 | x IS_A generic_real; |

42 | ra1[1..2]: x=2; |

43 | ra2[2..1]: x=3; (* empty*) |

44 | END badrelfor; |

45 | |

46 | MODEL relfor; |

47 | x IS_A generic_real; |

48 | FOR i IN [1..2] CREATE |

49 | ra3[i]: x = i; |

50 | END FOR; |

51 | FOR i IN [2..1] CREATE |

52 | ra4[i]: x = i; |

53 | END FOR; |

54 | END relfor; |

55 | |

56 | MODEL testfor; |

57 | v IS_A varfor; |

58 | r IS_A relfor; |

59 | END testfor; |

60 | |

61 | |

62 | (* |

63 | * z-emptyfor.a4c |

64 | * by Benjamin A Allan |

65 | * Part of the ASCEND Library |

66 | * $Date: 1998/06/17 19:39:35 $ |

67 | * $Revision: 1.4 $ |

68 | * $Author: mthomas $ |

69 | * $Source: /afs/cs.cmu.edu/project/ascend/Repository/models/z-emptyfor.a4c,v $ |

70 | * |

71 | * This file is part of the ASCEND Modeling Library. |

72 | * |

73 | * Copyright (C) 1998 Carnegie Mellon University |

74 | * Copyright (C) 1997 Benjamin A Allan |

75 | * |

76 | * The ASCEND Modeling Library is free software; you can redistribute |

77 | * it and/or modify it under the terms of the GNU General Public |

78 | * License as published by the Free Software Foundation; either |

79 | * version 2 of the License, or (at your option) any later version. |

80 | * |

81 | * The ASCEND Modeling Library is distributed in hope that it |

82 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |

83 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |

84 | * See the GNU General Public License for more details. |

85 | * |

86 | * You should have received a copy of the GNU General Public License |

87 | * along with the program; if not, write to the Free Software |

88 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139 USA. |

89 | *) |

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