Cargo Features

[dependencies]
serde_single_or_vec2 = { version = "1.0.0", default-features = false, features = ["std", "alloc"] }
default = std

The std feature is set by default whenever serde_single_or_vec2 is added without default-features = false somewhere in the dependency tree.

std default

Like serde either std or alloc is required

Enables std of serde

alloc

Enables alloc of serde

serde:

Provide impls for types in the Rust core allocation and collections library including String, Box<T>, Vec<T>, and Cow<T>. This is a subset of std but may be enabled without depending on all of std.