rhai/src/call.rs

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//! Helper module which defines `FnArgs` to make function calling easier.
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#![allow(non_snake_case)]
use crate::any::{Any, Dynamic};
#[cfg(not(feature = "no_index"))]
use crate::engine::Array;
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use crate::stdlib::{string::String, vec, vec::Vec};
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/// Trait that represent arguments to a function call.
pub trait FuncArgs {
/// Convert to a `Vec` of `Dynamic` arguments.
fn into_vec(self) -> Vec<Dynamic>;
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}
macro_rules! impl_std_args {
($($p:ty),*) => {
$(
impl FuncArgs for $p {
fn into_vec(self) -> Vec<Dynamic> {
vec![self.into_dynamic()]
}
}
)*
};
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}
impl_std_args!(String, char, bool);
#[cfg(not(feature = "no_index"))]
impl_std_args!(Array);
#[cfg(not(feature = "only_i32"))]
#[cfg(not(feature = "only_i64"))]
impl_std_args!(u8, i8, u16, i16, u32, i32, u64, i64);
#[cfg(feature = "only_i32")]
impl_std_args!(i32);
#[cfg(feature = "only_i64")]
impl_std_args!(i64);
#[cfg(not(feature = "no_float"))]
impl_std_args!(f32, f64);
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macro_rules! impl_args {
($($p:ident),*) => {
impl<$($p: Any + Clone),*> FuncArgs for ($($p,)*)
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{
fn into_vec(self) -> Vec<Dynamic> {
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let ($($p,)*) = self;
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#[allow(unused_variables, unused_mut)]
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let mut v = Vec::new();
$(v.push($p.into_dynamic());)*
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v
}
}
impl_args!(@pop $($p),*);
};
(@pop) => {
};
(@pop $head:ident) => {
};
(@pop $head:ident $(, $tail:ident)+) => {
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impl_args!($($tail),*);
};
}
#[cfg_attr(rustfmt, rustfmt_skip)]
impl_args!(A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T);