mirror of
https://github.com/nineties/planckforth
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43 lines
752 B
Forth
43 lines
752 B
Forth
\ planckforth -
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\ Copyright (C) 2021 nineties
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\ Ignore test codes. lib/tester.fs will redefine this when
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\ running tests.
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: T{
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begin
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word throw
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s" }T" streq if exit then
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again
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;
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s" Invalid argument" exception constant INVALID-ARGUMENT
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: check-argument ( f -- )
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unless INVALID-ARGUMENT throw then
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;
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defined? roll [unless]
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: roll ( w[n-1] ... w0 n -- w0 w[n-2] ... w0 w[n-1] )
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dup 0<= if drop else swap >r 1- recurse r> swap then
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;
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[then]
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private{
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( === Cons Cell === )
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struct
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cell% field first
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cell% field second
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end-struct cons-cell%
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: cons ( a b -- cons )
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cons-cell% %allocate throw
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tuck second !
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tuck first !
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; export
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: car first @ ; export
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: cdr second @ ; export
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}private
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