47 lines
1.2 KiB
Rust
47 lines
1.2 KiB
Rust
//! Helper module which defines `FnArgs` to make function calling easier.
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#![allow(non_snake_case)]
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use crate::any::{Dynamic, Variant};
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use crate::stdlib::vec::Vec;
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/// Trait that represents arguments to a function call.
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/// Any data type that can be converted into a `Vec<Dynamic>` can be used
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/// as arguments to a function call.
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pub trait FuncArgs {
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/// Convert to a `Vec<Dynamic>` of the function call arguments.
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fn into_vec(self) -> Vec<Dynamic>;
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}
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/// Macro to implement `FuncArgs` for tuples of standard types (each can be
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/// converted into `Dynamic`).
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macro_rules! impl_args {
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($($p:ident),*) => {
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impl<$($p: Variant + Clone),*> FuncArgs for ($($p,)*)
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{
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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();
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$(v.push($p.into_dynamic());)*
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v
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}
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}
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impl_args!(@pop $($p),*);
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};
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(@pop) => {
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};
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(@pop $head:ident) => {
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impl_args!();
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};
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(@pop $head:ident $(, $tail:ident)+) => {
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impl_args!($($tail),*);
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};
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}
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#[rustfmt::skip]
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impl_args!(A, B, C, D, E, F, G, H, J, K, L, M, N, P, Q, R, S, T, U, V);
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