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View Code? Open in Web Editor NEWUseful mathematical words in Forth.
License: GNU General Public License v3.0
Useful mathematical words in Forth.
License: GNU General Public License v3.0
Is there are usable and portable lambda expression implementation for Forth? As an example,
: prime' ( n n -- n ) nip true ; ( True to obtain next prime number. )
: prime ( n -- n ) 0 swap ['] prime' traverse-primes ;
could be stated more succinctly as:
: prime ( n -- n ) 0 swap '[ ( n n -- n ) nip true ]' traverse-primes ;
Resource: Adding lambda expressions to Forth
Try out some form of literate programming to document the Forth code. Particularly illuminating cases in the test suite could serve as examples in the text. Document formats could include HTML, Markdown, PDF, etc. Resources:
Test compatibility with various Forth systems. Does it work with for example 8-bit, 12-bit, 16-bit, 18-bit, 24-bit, 26-bit, 31-bit, etc. cells as well as valid but odd implementations?
The test suite probably needs at least 16 bits to be useful. Can it be made to adapt?
Resource: The Forth standard portability guide
Forth style conventions could be improved, especially naming. Resources:
Standard stack effect notation with suffixed types is somewhat undescriptive and less readable than desired. For example, the standard declaration of the extended Euclidean algorithm is:
\ Extended greatest common divisor. Bézout’s identity n1·n3 + n2·n4 = n5 holds.
: extended-gcd ( n1 n2 -- n3 n4 n5 )
Can the parameter names be improved in some standard way? For example (nonstandard):
\ Extended greatest common divisor. Bézout’s identity p·m + q·n = d holds.
: extended-gcd ( p q -- m n d )
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