Cargo Features

promql-parser has no features set by default.

[dependencies]
promql-parser = { version = "0.4.3", features = ["ser"] }
ser = serde, serde_json

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.

serde ser?
serde_json ser?