mirror of
https://github.com/nineties/planckforth
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24 lines
472 B
Forth
24 lines
472 B
Forth
\ planckforth -
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\ Copyright (C) 2021 nineties
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defined? roll [unless]
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: roll ( wn ... w1 n -- w1 wn ... w2 )
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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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\ 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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