interlinked/gegl/source/operations/generator.rs

46 lines
1.1 KiB
Rust

//! Macro-based [`crate::GeglOperation`] struct generator.
/// A macro to generate a struct that implements [`crate::GeglOperation`].
#[macro_export]
macro_rules! gegl_operation {
(
struct_name: $struct_name:ident,
gegl_name: $gegl_name:expr,
append_crop: $append_crop:expr,
values: ($($key:ident: $key_type:ty, $key_default:expr, $key_doc:expr),*,),
) => {
#[doc = concat!(" The `gegl:", $gegl_name, "` operation.")]
#[derive(Debug)]
pub struct $struct_name {
$(
#[doc = concat!(" ", $key_doc)]
pub $key: $key_type,
)*
}
impl Default for $struct_name {
fn default() -> $struct_name {
$struct_name {
$($key: $key_default,)*
}
}
}
impl $crate::GeglOperation for $struct_name {
fn append_crop_operation(&self) -> bool {
$append_crop
}
fn name(&self) -> &'static str {
concat!("gegl:", $gegl_name)
}
fn values(&self) -> $crate::GeglData {
$crate::indexmap! {
$(stringify!($key) => self.$key.to_string(),)*
}
}
}
};
}