82 lines
2.5 KiB
Rust
82 lines
2.5 KiB
Rust
macro_rules! builder_func {
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[ $name:ident, $type:tt func ] => {
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pub fn $name<F>(mut self, func: F) -> Self
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where F: FnOnce($type) -> $type
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{
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self.$name = Some(func($type::default())); self
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}
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};
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[ $name:ident, String ] => {
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pub fn $name<S>(mut self, value: S) -> Self
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where S: Into<String>
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{
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self.$name = Some(value.into()); self
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}
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};
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[ $name:ident, $type:ty ] => {
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pub fn $name(mut self, value: $type) -> Self {
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self.$name = Some(value); self
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}
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};
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}
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macro_rules! builder {
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[ @st ( $name:ident $field:tt: $type:tt alias = $alias:tt, $($rest:tt)* ) -> ( $($out:tt)* ) ] => {
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builder![ @st
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( $name $($rest)* ) -> (
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$($out)*
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#[serde(skip_serializing_if = "Option::is_none", rename = $alias)]
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pub $field: Option<$type>,
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)
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];
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};
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[ @st ( $name:ident $field:tt: $type:tt func, $($rest:tt)* ) -> ( $($out:tt)* ) ] => {
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builder![ @st ( $name $field: $type, $($rest)* ) -> ( $($out)* ) ];
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};
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[ @st ( $name:ident $field:ident: $type:ty, $($rest:tt)* ) -> ( $($out:tt)* ) ] => {
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builder![ @st
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( $name $($rest)* ) -> (
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$($out)*
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#[serde(skip_serializing_if = "Option::is_none")]
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$field: Option<$type>,
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)
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];
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};
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[ @st ( $name:ident ) -> ( $($out:tt)* ) ] => {
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#[derive(Debug, Default, PartialEq, Deserialize, Serialize)]
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pub struct $name { $($out)* }
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};
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[ @im ( $name:ident $field:ident: $type:tt func, $($rest:tt)* ) -> ( $($out:tt)* ) ] => {
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builder![ @im ( $name $($rest)* ) -> ( builder_func![$field, $type func]; $($out)* ) ];
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};
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[ @im ( $name:ident $field:ident: $type:tt alias = $modifier:tt, $($rest:tt)* ) -> ( $($out:tt)* ) ] => {
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builder![ @im ( $name $field: $type, $($rest)* ) -> ( $($out)* ) ];
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};
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[ @im ( $name:ident $field:ident: $type:tt, $($rest:tt)* ) -> ( $($out:tt)* ) ] => {
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builder![ @im ( $name $($rest)* ) -> ( builder_func![$field, $type]; $($out)* ) ];
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};
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[ @im ( $name:ident ) -> ( $($out:tt)* ) ] => {
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impl $name {
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pub fn new() -> Self {
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Self::default()
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}
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$($out)*
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}
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};
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[ $name:ident $($body:tt)* ] => {
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builder![@st ( $name $($body)* ) -> () ];
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builder![@im ( $name $($body)* ) -> () ];
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}
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}
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