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Implement sprintf "%f" in Crystal using Ryu Printf #14067

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merged 5 commits into from
Dec 13, 2023

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HertzDevil
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@HertzDevil HertzDevil commented Dec 7, 2023

Closes #12473. Resolves part of #8441.

%e, %g, %a, and their uppercase variants will be implemented in subsequent PRs; this PR sets up the general code structure.

Note that it is undefined behavior in C to specify both the 0 flag and a precision for float formats, but Ruby supports it, so Crystal follows suit.

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HertzDevil commented Dec 7, 2023

It seems the large constant tables are breaking WebAssembly CI in a similar fashion to #13918?

@@ -334,6 +346,75 @@ struct String::Formatter(A)
pad(str_size, flags) if flags.right_padding?
end

{% unless flag?(:wasm32) %}
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This might be redundant due to the LLVM optimizations?

spec/std/float_printer/ryu_printf_spec.cr Outdated Show resolved Hide resolved
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@straight-shoota straight-shoota added this to the 1.11.0 milestone Dec 12, 2023
@straight-shoota straight-shoota merged commit 93c9df4 into crystal-lang:master Dec 13, 2023
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@HertzDevil HertzDevil deleted the feature/ryu-printf2 branch December 13, 2023 11:18
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4 participants