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Quote: in Icon, tab (10|5) == tab(10)|tab(5) because a failure of tab(10) invokes the alternative value
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backtracking
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control returning functions and expressions
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failure returning functions and expressions
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Consider, for example, tab (10|5). … The expression 10|5 has two literal subexpressions, and … fails. This results in a "reevaluation" of the … to tab(10)|tab(5), as would be expected. Google-1 Google-2
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Topic: backtracking (30 items)
Topic: control returning functions and expressions (6 items)
Topic: failure returning functions and expressions (24 items)