Enum StringRepr 

#[non_exhaustive]
pub enum StringRepr {
    String,
    SmolStr,
    EcoString,
    CompactString,
}

The Rust type a proto string field maps to in generated owned structs.

The default is String. The other variants are small-string-optimized types that avoid String’s growable buffer for read-mostly schemas; each is gated behind the matching buffa Cargo feature (smol_str, ecow, compact_str), and the downstream crate must enable that feature so the re-exported type path (::buffa::smol_str::SmolStr, etc.) resolves.

Select a representation through buffa_build’s string_type / string_type_in builder methods. The wire format is identical regardless of representation — only the in-memory owned type changes; view types keep borrowing &str, and map<_, string> / map<string, _> keys and values always stay String.

Sizes below are for 64-bit targets. See the buffa README for a fuller comparison of the small-string crates.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

String

::buffa::alloc::string::String — 24-byte struct, growable and mutable (the default).

SmolStr

smol_str::SmolStr — 24-byte struct, inlines up to 23 bytes, O(1) clone of long strings via Arc<str>. Immutable (assign a new value to mutate). Requires the buffa/smol_str feature.

EcoString

ecow::EcoString — 16-byte struct, inlines up to 15 bytes, clone-on-write with O(1) clone. Immutable (assign a new value to mutate). Requires the buffa/ecow feature.

CompactString

compact_str::CompactString — 24-byte struct, inlines up to 24 bytes, mutable (a drop-in String replacement). Requires the buffa/compact_str feature.

Trait Implementations

impl Clone for StringRepr

fn clone(&self) -> StringRepr

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for StringRepr

impl Debug for StringRepr

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StringRepr

fn default() -> StringRepr

Returns the “default value” for a type.

impl Eq for StringRepr

impl PartialEq for StringRepr

fn eq(&self, other: &StringRepr) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for StringRepr