Module decimal 

Decimal functionality and extension traits.

This module provides DecimalLexEncoder, a variable-length, lexicographic byte encoding for fastnum::D128 values. The encoding ensures that byte-wise ordering preserves numeric ordering, which is critical for key construction in indexes. The encoder is stream-friendly: it guarantees an in-band terminator within the mantissa encoding and appends a trailing 0x00 so decoders can read until the first zero when values are concatenated in composite keys.

Where it’s used:

• val::number::Number::{as_decimal_buf, from_decimal_buf}
• key::value::StoreKeyNumber serde impls used in index key material

Ordering overview:

• Finite negatives < zero < finite positives
• −∞ < all finite < +∞ < NaN

See the struct-level documentation below for the precise byte format.

Structs

DecimalLexEncoder

Variable-length lexicographic encoding for D128 values that preserves sort order.