84 lines
2.3 KiB
Rust
84 lines
2.3 KiB
Rust
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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// !!!!!!!!!!! very unstable, use at your own risk !!!!!!!!!!!!!!!!!
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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use super::prelude::*;
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use std::ops::Fn;
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#[allow(non_upper_case_globals)]
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pub const void: () = ();
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pub struct Callback {
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function: FunctionType,
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}
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impl Callback {
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pub fn new<F, Args>(function: F) -> Callback
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where
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F: Fn(Args) -> (),
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F: 'static,
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FunctionType: FunctionTypeCreator<F, Args>,
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{
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Callback {
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function: FunctionType::new(function),
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}
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}
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pub fn execute<Args>(&self, arguments: Args)
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where
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FunctionType: FunctionTypeExecutorOneArg<Args>,
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{
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display_error!(self.function.execute(arguments));
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}
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}
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pub trait FunctionTypeCreator<F: Fn(Args) -> () + 'static, Args> {
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fn new(function: F) -> FunctionType;
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}
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pub trait FunctionTypeExecutorOneArg<Args> {
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fn execute(&self, execute: Args) -> VerboseResult<()>;
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}
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macro_rules! build_function_type {
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($struct_name: ident, $($ty: ty, $name: ident), *) => {
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pub enum $struct_name {
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$($name(Box<dyn Fn($ty)>)),*
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}
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$(
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impl<F: Fn($ty) -> () + 'static> FunctionTypeCreator<F, $ty> for $struct_name {
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fn new(function: F) -> FunctionType {
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$struct_name::$name(Box::new(function))
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}
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}
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impl FunctionTypeExecutorOneArg<$ty> for $struct_name {
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fn execute(&self, args: $ty) -> VerboseResult<()> {
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match self {
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FunctionType::$name(ref function) => {
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(function)(args);
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Ok(())
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}
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_ => {
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create_error!("wrong argument type for this callback");
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},
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}
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}
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}
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) *
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}
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}
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#[rustfmt::skip]
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build_function_type!(
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FunctionType,
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String, String,
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i32, I32,
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u32, U32,
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f32, F32,
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(), Void
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);
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