[TUHS] v7 K&R C
ron at ronnatalie.com
ron at ronnatalie.com
Thu May 14 22:25:16 AEST 2020
> On Wed, 13 May 2020, Rich Morin wrote:
>
>> A Fortran implementation I used years ago kept constants in a "literal
>> pool". So, if you called a subroutine, passing in a constant, there was
>> a possibility that the constant might be modified upon the routine's
>> return. I don't recall this ever causing a problem in practice, but the
>> possibility was amusing...
>
> As I dimly recall, Fortran has always used call by value/result (or
> whatever the term is). So, if you modify an argument that happened to be
> passed as a constant...
>
Fortran argument passing to functions is call by reference. Some
compilers had a non-standard exception to allow call by value.
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