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43 lines
672 B
C
43 lines
672 B
C
/* j/6/flip.c
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**
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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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u3qf_flip(
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u3_noun hel)
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{
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if ( c3y == u3r_sing(1, u3h(hel)) ) {
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if ( (c3y == u3t(hel)) ) {
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return u3nc(1, c3n);
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}
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else {
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c3_assert((c3n == u3t(hel)));
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return u3nc(1, c3y);
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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, c3n),
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u3nc(1, c3y));
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}
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}
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u3_noun
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u3wf_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 = u3r_at(u3x_sam, cor)) ) {
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return u3m_bail(c3__fail);
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} else {
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return u3qf_flip(hel);
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}
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}
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