darling_core/codegen/
postfix_transform.rs

1use quote::{quote, ToTokens, TokenStreamExt};
2use syn::{Ident, Path};
3
4/// A method invocation applied to a value.
5///
6/// This is used for `map` and `and_then` transforms in derivations.
7#[derive(Debug, Clone, PartialEq, Eq)]
8pub struct PostfixTransform {
9    pub(crate) transformer: Ident,
10    pub(crate) function: Path,
11}
12
13impl PostfixTransform {
14    pub fn new(transformer: Ident, function: Path) -> Self {
15        Self {
16            transformer,
17            function,
18        }
19    }
20}
21
22impl ToTokens for PostfixTransform {
23    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
24        let Self {
25            transformer,
26            function,
27        } = self;
28        tokens.append_all(quote!(.#transformer(#function)))
29    }
30}