rhai/tests/macro_unroll.rs

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#![cfg(not(any(feature = "no_index", feature = "no_module")))]
use rhai::plugin::*;
use rhai::{Engine, EvalAltResult, INT, Module};
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pub fn add_generic<T: std::ops::Add<Output = T>>(x: T, y: T) -> T {
x + y
}
pub fn mul_generic<T: std::ops::Mul<Output = T>>(x: T, y: T) -> T {
x * y
}
macro_rules! generate_ops {
($op_name:ident, $op_fn:ident, $($type_names:ident),+) => {
pub mod $op_name {
$(
pub mod $type_names {
use rhai::plugin::*;
use super::super::$op_fn;
#[export_fn]
pub fn op(x: $type_names, y: $type_names) -> $type_names {
$op_fn(x, y)
}
}
)*
}
}
}
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macro_rules! register_in_bulk {
($mod_name:ident, $op_name:ident, $($type_names:ident),+) => {
$(
{
let type_str = stringify!($type_names);
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set_exported_fn!($mod_name,
format!(concat!(stringify!($op_name), "_{}"), type_str),
crate::$op_name::$type_names::op);
}
)*
}
}
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generate_ops!(add, add_generic, i8, i16, i32, i64);
generate_ops!(mul, mul_generic, i8, i16, i32, i64);
#[test]
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fn test_generated_ops() -> Result<(), Box<EvalAltResult>> {
let mut engine = Engine::new();
let mut m = Module::new();
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register_in_bulk!(m, add, i8, i16, i32, i64);
register_in_bulk!(m, mul, i8, i16, i32, i64);
engine.load_package(m);
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#[cfg(feature = "only_i32")]
assert_eq!(engine.eval::<INT>("let a = 0; add_i32(a, 1)")?, 1);
#[cfg(not(feature = "only_i32"))]
assert_eq!(engine.eval::<INT>("let a = 0; add_i64(a, 1)")?, 1);
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#[cfg(feature = "only_i32")]
assert_eq!(engine.eval::<INT>("let a = 1; mul_i32(a, 2)")?, 2);
#[cfg(not(feature = "only_i32"))]
assert_eq!(engine.eval::<INT>("let a = 1; mul_i64(a, 2)")?, 2);
Ok(())
}