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proposal: strconv: make ParseFloat support fraction unicode characters #26159

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pjebs opened this issue Jun 30, 2018 · 6 comments
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proposal: strconv: make ParseFloat support fraction unicode characters #26159

pjebs opened this issue Jun 30, 2018 · 6 comments
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FeatureRequest Issues asking for a new feature that does not need a proposal. FrozenDueToAge Proposal
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@pjebs
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pjebs commented Jun 30, 2018

It would be nice if ParseFloat would support these characters:

½,↉, ⅓, ⅔, ¼, ¾, ⅕, ⅖, ⅗, ⅘, ⅙, ⅚, ⅐, ⅛, ⅜, ⅝, ⅞, ⅑, ⅒
@pjebs
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pjebs commented Jun 30, 2018

BTW: I'm only suggesting these be treated as a special case.

@agnivade agnivade changed the title ParseFloat support fraction unicode characters strconv: make ParseFloat support fraction unicode characters Jun 30, 2018
@agnivade agnivade added the FeatureRequest Issues asking for a new feature that does not need a proposal. label Jun 30, 2018
@agnivade agnivade added this to the Unplanned milestone Jun 30, 2018
@ghost
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ghost commented Jun 30, 2018

Do people need this? Does a library exist that does this? How popular is it?

@pjebs
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pjebs commented Jul 1, 2018

I came across a use-case and I assumed the library would convert "9½" to 9.5. I think it's a low-priority "nice-to-have" feature.

@robpike robpike changed the title strconv: make ParseFloat support fraction unicode characters proposal: strconv: make ParseFloat support fraction unicode characters Jul 2, 2018
@ALTree
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ALTree commented Jul 2, 2018

the library would convert "9½" to 9.5

What is "9⅓" converted to?

@pjebs
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pjebs commented Jul 4, 2018

@ALTree It can be documented what a 1/3 will become but it should be the most appropriate representation of 1/3 that a float64 can produce. It can be set by fiat and documented.

@rsc
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rsc commented Jul 9, 2018

Sorry, but no. ParseFloat is for decimals. We're not going to start recognizing circled-1234 etc either.

If you think others would find this useful, it would make sense to publish an external package providing this functionality. It doesn't have to be in the standard library.

@rsc rsc closed this as completed Jul 9, 2018
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