Setup packages

Author: mbrobbel

Cargo.toml

@@ -0,0 +1,37 @@
+[workspace]
+members = [
+  "narrow-derive"
+]
+
+[package]
+name = "narrow"
+version = "0.1.0"
+authors = ["Matthijs Brobbel <[email protected]>"]
+edition = "2018"
+description = "A Rust implementation of Apache Arrow"
+readme = "README.md"
+repository = "https://github.com/mbrobbel/narrow"
+license = "Apache-2.0 or MIT"
+keywords = ["Arrow"]
+categories = ["data-structures"]
+
+[features]
+default = []
+
+[dependencies]
+narrow-derive = { path = "narrow-derive", version = "0.1.0" }
+
+[dev-dependencies]
+criterion = "0.3"
+
+[profile.release]
+lto = true
+codegen-units = 1
+
+[profile.bench]
+lto = true
+codegen-units = 1
+
+[[bench]]
+name = "narrow"
+harness = false

benches/narrow/array/mod.rs

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+use criterion::Criterion;
+
+pub(super) fn bench(_c: &mut Criterion) {}

benches/narrow/main.rs

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+use criterion::{criterion_group, criterion_main, Criterion};
+
+mod array;
+
+criterion_group! {
+  name = narrow;
+  config = Criterion::default();
+  targets =
+    array::bench
+}
+criterion_main!(narrow);

narrow-derive/Cargo.toml

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+[package]
+name = "narrow-derive"
+version = "0.1.0"
+authors = ["Matthijs Brobbel <[email protected]>"]
+edition = "2018"
+
+[lib]
+proc-macro = true
+
+[features]
+
+[dependencies]
+proc-macro2 = "1"
+quote = "1"
+syn = { version = "1", features = ["derive", "full", "parsing", "extra-traits"] }

narrow-derive/src/lib.rs

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+

src/lib.rs

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+//! # narrow
+//!
+//! A Rust implementation of Apache Arrow.
+
+use std::ops::{Add, AddAssign, Sub};
+
+// Hidden re-exports of types used in the `narrow-derive` crate.
+#[doc(hidden)]
+pub mod re_exports {
+    extern crate self as narrow;
+}
+
+pub use narrow_derive::*;
+
+/// Subtrait for primitive types.
+///
+/// This exists to use as trait bound where one or more of the supertraits of
+/// this trait are required, and to restrict certain implementations to Arrow
+/// primitive types.
+pub trait Primitive:
+    Add<Output = Self> + AddAssign + Copy + Default + Sub<Output = Self> + sealed::SealedPrimitive
+{
+}
+
+impl Primitive for i8 {}
+impl Primitive for i16 {}
+impl Primitive for i32 {}
+impl Primitive for i64 {}
+impl Primitive for u8 {}
+impl Primitive for u16 {}
+impl Primitive for u32 {}
+impl Primitive for u64 {}
+impl Primitive for f32 {}
+impl Primitive for f64 {}
+
+// Sealed traits.
+mod sealed {
+    pub trait SealedPrimitive {}
+    impl<T> SealedPrimitive for T where T: crate::Primitive {}
+}