Compiled ToStrings under -reflectionfree for DUs and Records#19976

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charlesroddie wants to merge 34 commits into

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charlesroddie:DUsRecordsCompiledToStrings

Commits on Jun 21, 2026

Add a compiler intrinsic for the 'string' operator

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Generate a match-based ToString for unions under --reflectionfree

charlesroddie
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Extract mkStringConcat helper for arity-dispatched String.Concat

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Fix generated union ToString for generic unions

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Render union ToString fields like option (null -> "null")

charlesroddie
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Tidy reflection-free union ToString tests

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Add reflection-free ToString to Result and Choice

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Generate a single-line ToString for records under --reflectionfree

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Update FSharp.Core surface-area baselines for Result/Choice ToString

charlesroddie
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Add release notes

charlesroddie
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Generate a single-line ToString for anonymous records under --reflectionfree

charlesroddie
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Commits on Jun 22, 2026

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