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feat(juniper_codegen): add conversions for enum variants to strings #540

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feat(juniper_codegen): add conversions for enum variants to strings #540

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cc63933
feat(juniper_codegen): add conversions for enum variants to strings
garbados Feb 20, 2020
58a393d
Merge branch 'master' into feat/enum-string-conversions
LegNeato Mar 9, 2020
fc1b484
Merge branch 'master' into feat/enum-string-conversions
LegNeato Mar 25, 2020
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14 changes: 14 additions & 0 deletions juniper_codegen/src/derive_enum.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -147,6 +147,7 @@ pub fn impl_enum(ast: &syn::DeriveInput, is_internal: bool) -> TokenStream {
let mut resolves = TokenStream::new();
let mut from_inputs = TokenStream::new();
let mut to_inputs = TokenStream::new();
let mut to_strings = TokenStream::new();

for variant in variants {
match variant.fields {
Expand Down Expand Up @@ -204,6 +205,11 @@ pub fn impl_enum(ast: &syn::DeriveInput, is_internal: bool) -> TokenStream {
&#ident::#var_ident =>
#juniper_path::InputValue::scalar(#name.to_string()),
});

// Build to_strings clause.
to_strings.extend(quote! {
&#ident::#var_ident => #name.to_string(),
})
}

let _async = quote!(
Expand Down Expand Up @@ -281,6 +287,14 @@ pub fn impl_enum(ast: &syn::DeriveInput, is_internal: bool) -> TokenStream {
}
}

impl From<#ident> for String {
fn from(&self) -> String {
match self {
#to_strings
}
}
}

#_async
};

Expand Down