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wip: providing content chunks with ednprovider

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🪞👃🪞 2025-01-12 16:12:26 +01:00
parent 1ff35baea9
commit 8c54f8e426
8 changed files with 157 additions and 41 deletions
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42
edn/src/edn_provide.rs Normal file
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@ -0,0 +1,42 @@
use crate::*;
/// Implement `EdnProvide` for a type and context
#[macro_export] macro_rules! edn_provide {
($type:ty:|$self:ident:$State:ty|{ $($pat:pat => $expr:expr),* $(,)? }) => {
//impl EdnProvide<$type> for $State {
//fn get <S: AsRef<str>> (&$self, edn: &EdnItem<S>) -> Option<$type> {
//Some(match edn.to_ref() {
//$(EdnItem::Sym($pat) => $expr),*,
//_ => return None
//})
//}
//}
impl EdnProvide<$type> for $State {
fn get <S: AsRef<str>> (&$self, edn: &EdnItem<S>) -> Option<$type> {
Some(match edn.to_ref() {
$(EdnItem::Sym($pat) => $expr),*,
_ => return None
})
}
}
}
}
/// Map EDN tokens to parameters of a given type for a given context
pub trait EdnProvide<U> {
fn get <S: AsRef<str>> (&self, _edn: &EdnItem<S>) -> Option<U> {
None
}
fn get_or_fail <S: AsRef<str>> (&self, edn: &EdnItem<S>) -> U {
self.get(edn).expect("no value")
}
}
impl<T: EdnProvide<U>, U> EdnProvide<U> for &T {
fn get <S: AsRef<str>> (&self, edn: &EdnItem<S>) -> Option<U> {
(*self).get(edn)
}
fn get_or_fail <S: AsRef<str>> (&self, edn: &EdnItem<S>) -> U {
(*self).get_or_fail(edn)
}
}

9
edn/src/lib.rs
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@ -3,10 +3,11 @@
pub(crate) use std::{fmt::{Debug, Formatter, Error as FormatError}};
mod edn_error; pub use self::edn_error::*;
mod edn_item; pub use self::edn_item::*;
mod edn_iter; pub use self::edn_iter::*;
mod edn_token; pub use self::edn_token::*;
mod edn_error; pub use self::edn_error::*;
mod edn_item; pub use self::edn_item::*;
mod edn_iter; pub use self::edn_iter::*;
mod edn_token; pub use self::edn_token::*;
mod edn_provide; pub use self::edn_provide::*;
#[cfg(test)] #[test] fn test_edn () -> Result<(), ParseError> {
use EdnItem::*;