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Annotation of researchv10dc/dist/man/v3/man1/sno.1, revision 1.1

1.1     ! root        1: .pa 1
        !             2: .he 'SNO (I)'2/9/73'SNO (I)'
        !             3: .ti 0
        !             4: NAME           sno -- SNOBOL interpreter
        !             5: .sp
        !             6: .ti 0
        !             7: SYNOPSIS       sno___ [ file ]
        !             8: .sp
        !             9: .ti 0
        !            10: DESCRIPTION    sno___
        !            11: is a SNOBOL III (with slight differences)
        !            12: compiler and interpreter.
        !            13: sno___ obtains input from the
        !            14: concatenation of file____ and the standard input.
        !            15: All input through a statement
        !            16: containing the label 'end' is
        !            17: considered program and is compiled.
        !            18: The rest is available to 'syspit'.
        !            19: 
        !            20: The following is a list of differences
        !            21: between sno___ and SNOBOL III:
        !            22: 
        !            23: .in +3
        !            24: There are no unanchored searches.
        !            25: To get the same effect:
        !            26: 
        !            27: .ti +3
        !            28: a ** b         unanchored search for b
        !            29: .ti +3
        !            30: a *x* b = x c  unanchored assignment
        !            31: 
        !            32: No back referencing
        !            33: 
        !            34: .ti +3
        !            35: x = "abc"
        !            36: .ti +3
        !            37: a *x* x                unanchored search for "abc"
        !            38: 
        !            39: Different function declaration.
        !            40: The function declaration is
        !            41: done at compile time by the use of the label 'define'.
        !            42: Thus there is no ability to define functions at run time
        !            43: and the use of the name 'define' is preempted.
        !            44: There is also no provision for 'automatic' variables
        !            45: other than the parameters.
        !            46: 
        !            47: .ti +3
        !            48: define f()
        !            49: .ti +3
        !            50:        or
        !            51: .ti +3
        !            52: define f(a,b,c)
        !            53: 
        !            54: All labels except 'define' (even 'end')
        !            55: must have a non-empty statement.
        !            56: 
        !            57: If 'start' is a label in the program,
        !            58: program execution will start there.
        !            59: If not, execution begins with the first
        !            60: executable statement.
        !            61: ('define' is not an executable statement)
        !            62: 
        !            63: There are no builtin functions
        !            64: 
        !            65: Variable length patterns
        !            66: at the end of a pattern match are not treated
        !            67: specially.
        !            68: They still match the shortest rather than
        !            69: longest text.
        !            70: 
        !            71: Parentheses for arithmetic are not needed.
        !            72: Normal (eg FORTRAN) precedence applies.
        !            73: Because of this, the arithmetic
        !            74: operators '/' and '*'
        !            75: must be set off by space.
        !            76: 
        !            77: The right side of assignments
        !            78: must be non-empty.
        !            79: 
        !            80: Either ' or " may be used for literal quotes.
        !            81: 
        !            82: The pseudo-variable 'sysppt' is not available.
        !            83: .in -3
        !            84: .sp
        !            85: .ti 0
        !            86: FILES          --
        !            87: .sp
        !            88: .ti 0
        !            89: SEE ALSO       SNOBOL III manual.
        !            90: (JACM____; Vol. 11 No. 1; Jan 1964; pp 21)
        !            91: .sp
        !            92: .ti 0
        !            93: DIAGNOSTICS    As appropriate
        !            94: .sp
        !            95: .ti 0
        !            96: BUGS           Runtime
        !            97: diagnostics give the
        !            98: last program line number
        !            99: rather than the executing statement line number.

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