[J3] Consistency in conversion functions

[Malcolm Cohen]

1. What Kurt said.

2. We have six intrinsic type specifiers (for five intrinsic type). We have conversion intrinsics for all six (plus CHARACTER has an extra one). Of those six intrinsic type specifiers:
- four have contracted names (INT, DBLE, CHAR/ACHAR, CMPLX)
- one has the name in full, but it is the same as what the contracted name would be anyway (REAL)
- one has the name in full, and it is longer (LOGICAL).

Clearly, the easiest route to 'consistency' would be to add LOGICL for Logical kind conversions, as that is the only inconsistent one.

3. Dusting off the old proposal for COMPLEX (which it seems that gfortran did) would at least potentially fix future user bugs, so that would be the most attractive proposal so far. But existing bugs won't be fixed unless more compilers could produce warning messages when the user has CMPLX with a double or quad precision argument, which we could encourage by adding COMPLEX in F202y and making CMPLX obsolescent in F203z.

Cheers,
-- 
..............Malcolm Cohen, NAG Oxford/Tokyo.