pointers: add a scalar value decoder#269
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Adds decodeValue(data, type): a pure, framework-agnostic function that
turns a resolved value region's bytes + the variable's static type into a
readable string (uint256 -> "2", not 0x00..02) — the scalar-first slice of
the value-rendering reduce layer.
Handles uint (decimal), int (two's-complement over the region width), bool,
address (EIP-55 checksummed), and static bytesN (left-aligned). Dynamic
bytes/string, aggregates, fixed/ufixed, enum, unresolved {id} type refs, and
missing types fall back to raw hex so callers never break.
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This was referenced Jul 16, 2026
gnidan
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Adds
decodeValue(data, type)to@ethdebug/pointers: a pure function thatturns a resolved value region's bytes plus a variable's static type into a
readable string, so a
uint256local reads as2rather than0x0000…0002.This is the scalar-first slice of the value-rendering layer. Decoding is
location-blind: it operates on already-resolved bytes and the type, with no
machine state or pointer logic.
Handled types:
uint<N>— decimalint<N>— signed decimal (two's complement over the region's byte width)bool—true/falseaddress— EIP-55 checksummed0x…bytes<N>—0x…(left-aligned)Anything else — dynamic
bytes/string, arrays, structs, mappings,fixed/ufixed,enum, an unresolved{ id }type reference, or a missingtype — falls back to the raw hex of the region bytes, so callers never break
on an unhandled shape. Aggregate and dynamic decoding are left for later.
Tests cover each scalar kind — including tightly-stored vs. sign-extended
integers and the EIP-55 vector — and the hex fallbacks.