structaccess: match encoding/json on ambiguous embedded fields - #6468

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denik wants to merge 15 commits into

denik/structaccess-embedded-lookupfrom

denik/structaccess-embed-ambiguity

Commits on Sep 3, 2026

structaccess: reach fields of a doubly-embedded struct
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7da87f1
structaccess: resolve embedded fields breadth-first, as encoding/json does
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4090e1f
structaccess: search embedded structs breadth-first across the whole tree
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structaccess: say what the doubly-embedded test is really asserting
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fc887df
structaccess: treat a same-depth embed conflict as not found
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structaccess: silence vet on the deliberately ambiguous test fixture
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structaccess: do not walk a cyclic embedding twice
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structaccess: notice a diamond embedding as ambiguous
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structaccess: ambiguity is a property of the type, not of the value
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structaccess: resolve a field on the type, then navigate the value by index
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structwalk: flatten an embed only when encoding/json flattens it
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structdiff: report a tagged embed's changes under its own name
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structaccess: follow encoding/json's precedence rules for a field name
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structaccess: descend into a repeated embedded type once, as encoding/json does
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structaccess: pin the repeated-embed matrix against encoding/json
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