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Annotation of 43BSD/contrib/icon/man/cat2/image.2, revision 1.1.1.1

1.1       root        1: 
                      2: 
                      3: 
                      4: IMAGE(2)              Icon Program Library               IMAGE(2)
                      5: 
                      6: 
                      7: 
                      8: NNNNAAAAMMMMEEEE
                      9:      Image - generalized string image of Icon value
                     10: 
                     11: SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
                     12:      IIIImmmmaaaaggggeeee((((xxxx))))
                     13:      IIIImmmmaaaaggggeeeexxxx((((xxxx))))
                     14: 
                     15: DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
                     16:      The procedure IIIImmmmaaaaggggeeee((((xxxx)))) produces a string image of the value
                     17:      xxxx. The value produced is a generalization of the value pro-
                     18:      duced by the Icon function iiiimmmmaaaaggggeeee((((xxxx)))), providing detailed
                     19:      information about structures.
                     20: 
                     21:      Tags are used to uniquely identify structures. A tag con-
                     22:      sists of a letter identifying the type followed by an
                     23:      integer. The tag letters are LLLL for lists, RRRR for records, and
                     24:      TTTT for tables. The first time a structure is encountered, it
                     25:      is imaged as the tag followed by a colon, followed by a
                     26:      representation of the structure. If the same structure is
                     27:      encountered again, only the tag is given.
                     28: 
                     29:      An example is
                     30: 
                     31:           a := ["x"]
                     32:           push(a,a)
                     33:           t := table()
                     34:           push(a,t)
                     35:           t[a] := t
                     36:           t["x"] := []
                     37:           t[t] := a
                     38:           write(Image(t))
                     39: 
                     40:      which produces
                     41: 
                     42:           T1:["x"->L1:[],L2:[T1,L2,"x"]->T1,T1->L2]
                     43: 
                     44:      Note that a table is represented as a list of entry and
                     45:      assigned values separated by ---->>>>s.
                     46: 
                     47:      The procedure IIIImmmmaaaaggggeeeexxxx((((xxxx)))) is similar to IIIImmmmaaaaggggeeee((((xxxx)))), except that
                     48:      newlines and spaces are inserted to that the printed result
                     49:      is displayed on multiple lines with indentation. There are
                     50:      other formatting details that differ between the two pro-
                     51:      cedures.  For the example given above, the result of
                     52: 
                     53:           write(Imagex(t))
                     54: 
                     55:      is
                     56: 
                     57:           T1:{
                     58:              "x"
                     59:              ---
                     60: 
                     61: 
                     62: 
                     63: Version 5.9    The University of Arizona - 6/28/83              1
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                     68: 
                     69: 
                     70: IMAGE(2)              Icon Program Library               IMAGE(2)
                     71: 
                     72: 
                     73: 
                     74:           L1:[]
                     75:              ]
                     76:           ------
                     77:           L2:[
                     78:              T1
                     79:              L2
                     80:              "x"
                     81:              ]
                     82:           ---
                     83:           T1
                     84:           ------
                     85:           T1
                     86:           ---
                     87:           L2
                     88:           ------
                     89:           ]
                     90: 
                     91: 
                     92: AAAAUUUUTTTTHHHHOOOORRRR
                     93:      Ralph E. Griswold
                     94: 
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                    129: Version 5.9    The University of Arizona - 6/28/83              2
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