Research V3 development

Work on file man/man1/sno.1

Co-Authored-By: Dennis Ritchie <dmr@research.uucp>
Synthesized-from: v3

diff --git a/man/man1/sno.1 b/man/man1/sno.1
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+.pa 1
+.he 'SNO (I)'2/9/73'SNO (I)'
+.ti 0
+NAME           sno -- SNOBOL interpreter
+.sp
+.ti 0
+SYNOPSIS       sno\b\b\b___ [ file ]
+.sp
+.ti 0
+DESCRIPTION    sno\b\b\b___
+is a SNOBOL III (with slight differences)
+compiler and interpreter.
+sno\b\b\b___ obtains input from the
+concatenation of file\b\b\b\b____ and the standard input.
+All input through a statement
+containing the label 'end' is
+considered program and is compiled.
+The rest is available to 'syspit'.
+
+The following is a list of differences
+between sno\b\b\b___ and SNOBOL III:
+
+.in +3
+There are no unanchored searches.
+To get the same effect:
+
+.ti +3
+a ** b         unanchored search for b
+.ti +3
+a *x* b = x c  unanchored assignment
+
+No back referencing
+
+.ti +3
+x = "abc"
+.ti +3
+a *x* x                unanchored search for "abc"
+
+Different function declaration.
+The function declaration is
+done at compile time by the use of the label 'define'.
+Thus there is no ability to define functions at run time
+and the use of the name 'define' is preempted.
+There is also no provision for 'automatic' variables
+other than the parameters.
+
+.ti +3
+define f()
+.ti +3
+       or
+.ti +3
+define f(a,b,c)
+
+All labels except 'define' (even 'end')
+must have a non-empty statement.
+
+If 'start' is a label in the program,
+program execution will start there.
+If not, execution begins with the first
+executable statement.
+('define' is not an executable statement)
+
+There are no builtin functions
+
+Variable length patterns
+at the end of a pattern match are not treated
+specially.
+They still match the shortest rather than
+longest text.
+
+Parentheses for arithmetic are not needed.
+Normal (eg FORTRAN) precedence applies.
+Because of this, the arithmetic
+operators '/' and '*'
+must be set off by space.
+
+The right side of assignments
+must be non-empty.
+
+Either ' or " may be used for literal quotes.
+
+The pseudo-variable 'sysppt' is not available.
+.in -3
+.sp
+.ti 0
+FILES          --
+.sp
+.ti 0
+SEE ALSO       SNOBOL III manual.
+(JACM\b\b\b\b____; Vol. 11 No. 1; Jan 1964; pp 21)
+.sp
+.ti 0
+DIAGNOSTICS    As appropriate
+.sp
+.ti 0
+BUGS           Runtime
+diagnostics give the
+last program line number
+rather than the executing statement line number.