TOML

TOML is popular for Rust project configuration (Cargo.toml). STYX offers different trade-offs for deeply nested structures.

Simple object

toml

name = "my-app"
version = "1.0.0"

styx

name my-app
version 1.0.0

toml

[package]
name = "my-app"
version = "1.0.0"

[dependencies]
serde = "1.0"

[dependencies.tokio]
version = "1.0"
features = ["full"]

styx

package {
  name my-app
  version 1.0.0
}
dependencies {
  serde 1.0
  tokio {
    version 1.0
    features (full)
  }
}

toml

[[servers]]
host = "alpha"
port = 8080

[[servers]]
host = "beta"
port = 8081

styx

servers (
  {host alpha, port 8080}
  {host beta, port 8081}
)

toml

point = { x = 1, y = 2 }

styx

point {x 1, y 2}

TOML 1.1 allows multi-line inline tables with trailing commas. STYX comma-separated objects must be single-line.

toml

[server]
host = "localhost"

[database]
url = "postgres://..."

[server]  # reopening server
port = 8080

styx

server {
  host localhost
  port 8080
}
database {
  url postgres://...
}

TOML allows reopening sections. In STYX, each key appears exactly once.