Enlarging the math library repertoire for Algol 68

[Jose E. Marchesi]

Hello.

> While perusing some of the ga68 compiler source tree, I found in file
> gcc-16.1.0/gcc/algol68/a68-parser-taxes.cc a list of 23 additional
> functions
>
> 	arccosdg	  cbrt		    curt	      gammaincgf
> 	arccotdg	  cosdg		    erf		      sindg
> 	arcsindg	  cospi		    erfc	      sinpi
> 	arctandg	  cot		    gamma	      tandg
> 	beta		  cotdg		    gammainc	      tanpi
> 	betainc		  cotpi		    gammaincg
>
> that might appear to be supported, but attempts to use them fail at
> compile time with reports of unrecognized functions.
>
> Do they need a special pragma to enable their access?  Or is it the
> case that this is work-in-progress, and other parts of ga68 are
> awaiting updates to fully support them?

These entries in the ACCEPT lis tin is_mappable_routine are remainings
of Genie, which support these functions.

These are not standard operators in Algol 68 and I don't plan to support
them as intrinsics in the compiler.  Will remoe them.

>
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