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x/text/number: support formatting of custom types #28451

ainar-g opened this Issue Oct 28, 2018 · 1 comment


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ainar-g commented Oct 28, 2018

This is based on a StackOverflow question.

Package allows locale-specific formatting of numbers à-la fmt. Unfortunately, unlike fmt, this package doesn't have an interface to let types other than the built-in numeric types tell the package how to format them. Or rather, the interface is there, but it's in an internal package, so the users can't really implement it.

This wouldn't be bad if math/big types or types whose String() method produces numbers were supported, but as of now that is still a TODO.

@gopherbot gopherbot added this to the Unreleased milestone Oct 28, 2018

@ainar-g ainar-g changed the title x/text/number: support custom formatting x/text/number: support formatting of custom types Oct 28, 2018


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ainar-g commented Dec 1, 2018

This may or may not be a dup of #15274, although that issue only concerns currency amounts.

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