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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| use quote::quote; | ||
| use syn::{DeriveInput, Ident}; | ||
|
|
||
| pub(crate) fn expand_functional_contribution( | ||
| input: DeriveInput, | ||
| ) -> syn::Result<proc_macro2::TokenStream> { | ||
| let ident = input.ident; | ||
| let variants = match input.data { | ||
| syn::Data::Enum(syn::DataEnum { ref variants, .. }) => variants, | ||
| _ => panic!("this derive macro only works on enums"), | ||
| }; | ||
|
|
||
| let functional_contribution = impl_functional_contribution(&ident, variants); | ||
| let display = impl_display(&ident, variants); | ||
| let from = impl_from(&ident, variants); | ||
| Ok(quote! { | ||
| #functional_contribution | ||
| #display | ||
| #from | ||
| }) | ||
| } | ||
|
|
||
| fn impl_functional_contribution( | ||
| ident: &Ident, | ||
| variants: &syn::punctuated::Punctuated<syn::Variant, syn::token::Comma>, | ||
| ) -> proc_macro2::TokenStream { | ||
| let weight_functions = variants.iter().map(|v| { | ||
| let name = &v.ident; | ||
| quote! { | ||
| Self::#name(functional_contribution) => functional_contribution.weight_functions(temperature) | ||
| } | ||
| }); | ||
| let weight_functions_pdgt = variants.iter().map(|v| { | ||
| let name = &v.ident; | ||
| quote! { | ||
| Self::#name(functional_contribution) => functional_contribution.weight_functions_pdgt(temperature) | ||
| } | ||
| }); | ||
| let helmholtz_energy_density = variants.iter().map(|v| { | ||
| let name = &v.ident; | ||
| quote! { | ||
| Self::#name(functional_contribution) => functional_contribution.helmholtz_energy_density(temperature, weighted_densities) | ||
| } | ||
| }); | ||
|
|
||
| quote! { | ||
| impl FunctionalContribution for #ident { | ||
| fn weight_functions<N: DualNum<f64> + Copy+ScalarOperand>(&self, temperature: N) -> WeightFunctionInfo<N> { | ||
| match self { | ||
| #(#weight_functions,)* | ||
| } | ||
| } | ||
| fn weight_functions_pdgt<N: DualNum<f64> + Copy+ScalarOperand>(&self, temperature: N) -> WeightFunctionInfo<N> { | ||
| match self { | ||
| #(#weight_functions_pdgt,)* | ||
| } | ||
| } | ||
| fn helmholtz_energy_density<N: DualNum<f64> + Copy+ScalarOperand>( | ||
| &self, | ||
| temperature: N, | ||
| weighted_densities: ArrayView2<N>, | ||
| ) -> EosResult<Array1<N>> { | ||
| match self { | ||
| #(#helmholtz_energy_density,)* | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn impl_display( | ||
| ident: &Ident, | ||
| variants: &syn::punctuated::Punctuated<syn::Variant, syn::token::Comma>, | ||
| ) -> proc_macro2::TokenStream { | ||
| let fmt = variants.iter().map(|v| { | ||
| let name = &v.ident; | ||
| quote! { | ||
| Self::#name(functional_contribution) => functional_contribution.fmt(f) | ||
| } | ||
| }); | ||
|
|
||
| quote! { | ||
| impl std::fmt::Display for #ident { | ||
| fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { | ||
| match self { | ||
| #(#fmt,)* | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn impl_from( | ||
| ident: &Ident, | ||
| variants: &syn::punctuated::Punctuated<syn::Variant, syn::token::Comma>, | ||
| ) -> proc_macro2::TokenStream { | ||
| let from = variants.iter().map(|v| { | ||
| let name = &v.ident; | ||
| let syn::Fields::Unnamed(syn::FieldsUnnamed { unnamed, .. }) = &v.fields else { | ||
| panic!("All variants must be tuple structs!") | ||
| }; | ||
| let inner = &unnamed.first().unwrap().ty; | ||
| quote! { | ||
| impl From<#inner> for #ident { | ||
| fn from(variant: #inner) -> Self { | ||
| Self::#name(variant) | ||
| } | ||
| } | ||
| } | ||
| }); | ||
|
|
||
| quote! { | ||
| #(#from)* | ||
| } | ||
| } |
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