74 lines
1.7 KiB
Rust
74 lines
1.7 KiB
Rust
//! Macro-based [`crate::GeglOperation`] struct generator.
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/// A macro to generate a struct that implements [`crate::GeglOperation`].
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#[macro_export]
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macro_rules! gegl_operation {
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(
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struct_name: $struct_name:ident,
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gegl_name: $gegl_name:expr,
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append_crop: $append_crop:expr,
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values: ($($key:ident: $key_type:ty, $key_default:expr, $key_doc:expr),*,),
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) => {
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#[doc = concat!(" The `gegl:", $gegl_name, "` operation.")]
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#[derive(Debug)]
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pub struct $struct_name {
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$(
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#[doc = concat!(" ", $key_doc)]
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pub $key: $key_type,
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)*
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}
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impl Default for $struct_name {
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fn default() -> $struct_name {
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$struct_name {
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$($key: $key_default,)*
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}
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}
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}
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impl $crate::GeglOperation for $struct_name {
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fn append_crop_operation(&self) -> bool {
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$append_crop
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}
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fn name(&self) -> &'static str {
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concat!("gegl:", $gegl_name)
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}
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fn values(&self) -> $crate::GeglData {
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$crate::indexmap! {
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$(stringify!($key) => self.$key.to_string(),)*
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}
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}
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}
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};
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}
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/// A macro to generate an enum that implements [`std::fmt::Display`].
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#[macro_export]
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macro_rules! gegl_enum {
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(
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$enum_name:ident,
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$($key:ident: $value:expr),*,
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) => {
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#[doc = "TODO: Generate documentation for [`gegl_enum!`]."]
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#[derive(Debug)]
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pub enum $enum_name {
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$(
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#[doc = "TODO: Generate documentation for [`gegl_enum!`]."]
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$key,
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)*
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}
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impl std::fmt::Display for $enum_name {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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let display = match self {
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$($enum_name::$key => $value,)*
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};
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write!(f, "{display}")
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}
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}
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};
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}
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