26 lines
337 B
Plaintext
26 lines
337 B
Plaintext
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def otherwise=true:
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proc xxtoy(chan in, out, value x, y)=
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var c:
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seq
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c:= not EOF
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while c<>EOF
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seq
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in ? c
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if
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c=x
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seq
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in ? c
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if
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c=x
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out ! y
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otherwise
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out ! x; c
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otherwise
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out ! c
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:
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chan link:
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par
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xxtoy(input, link, 'a', 'b')
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xxtoy(link, output, 'b', 'c')
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