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44 lines
742 B
C
44 lines
742 B
C
/* j/6/flip.c
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**
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** This file is in the public domain.
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*/
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#include "all.h"
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/* functions
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*/
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u3_noun
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u3_cqf_flip(
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u3_noun hel)
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{
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if ( u3_yes == u3_cr_sing(1, u3h(hel)) ) {
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if ( (u3_yes == u3t(hel)) ) {
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return u3nc(1, u3_no);
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}
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else {
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c3_assert((u3_no == u3t(hel)));
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return u3nc(1, u3_yes);
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}
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}
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else {
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return u3nq
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(6,
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u3k(hel),
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u3nc(1, u3_no),
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u3nc(1, u3_yes));
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}
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}
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u3_noun
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u3_cwf_flip(
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u3_noun cor)
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{
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u3_noun hel;
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if ( u3_none == (hel = u3_cr_at(u3_cv_sam, cor)) ) {
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return u3_cm_bail(c3__fail);
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} else {
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return u3_cqf_flip(hel);
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}
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}
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