Cargo Features

[dependencies]
moveref = { version = "1.0.0", default-features = false, features = ["std", "alloc", "debug", "cxx", "valgrind"] }
default = cxx, std

These default features are set whenever moveref is added without default-features = false somewhere in the dependency tree.

std default = alloc

Enables std of tracing

alloc std
debug = tracing
cxx default

With c++20

valgrind

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

tracing debug? std