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Status Not under consideration
Workspace PL/I Compilers
Created by Guest
Created on Jan 19, 2015

RELATED IDEAS

Multi-compare builtin

In code it is not uncommon to have compares of the type

if a > b | (a = b & c > d | (c = d & e > f)) then

A builtin function of the type

if "multicompare"(a > b, c > d, e > f, ...) then

comparable to the new "between" and "inlist" delivered in Enterprise PL/I V4.5 would simplify setting up such compares, and could potentially eliminate multiple compares of a & b by reusing the result of the a > b compare for the a = b compare.

The function would expand all but the last compare into the format of the type specified at the top of this RFE, i.e. a

if "multicompare"(a > b, c < d, e > f, g < h) then

would generate code that is equivalent to

if a > b | (a = b & c < d | (c = d & e > f | (e = f & g < h))) then

Idea priority Low
  • Guest
    Reply
    |     Sep 14, 2015

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Programming Languages
    Product - PL/I Compilers

    For recording keeping, the previous attributes were:
    Brand - Rational
    Product family - Design & development
    Product - PL/I Compilers

  • Guest
    Reply
    |     Feb 3, 2015

    this function seems to be somewhat complicated given its limited usefulness, and the function could be provided by a macro. In either case, it should probably be defined with just a list of operands and without operators; so that multicompare( a, b, c, d ) would become ( a > b | (a=b & c > d) )

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