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def float.of

yaml-for-bend@0.1.1.0 · core.bend:84

import yaml-for-bend@0.1.1.0/core.bend as Core
import Base
import yaml-for-bend@0.1.1.0/re.bend as R

84# A float's text, if +s+ is one: as written, or ".inf", "-.inf", ".nan".
85def float.of(+s: String) -> Maybe<&2, String>:
86  +u = unsigned(s)
87  Bool.pick(Maybe<&2, String>, is_inf(u), Some{Bool.pick(String, is_neg(s), "-.inf", ".inf")},
88    Bool.pick(Maybe<&2, String>, is_nan(s), Some{".nan"},
89      Bool.pick(Maybe<&2, String>, R.matches(float.pat(), s), Some{s}, None{})))

Uses (9)

Used by (2)