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extern crate proc_macro;
use proc_macro::TokenStream;
use proc_macro2::Span;
use proc_macro_crate::crate_name;
use syn::{Ident, ItemEnum, ItemStruct, ItemUnion};
use borsh_derive_internal::*;
use borsh_schema_derive_internal::*;
#[proc_macro_derive(BorshSerialize, attributes(borsh_skip))]
pub fn borsh_serialize(input: TokenStream) -> TokenStream {
let cratename = Ident::new(
&crate_name("borsh").unwrap_or("borsh".to_string()),
Span::call_site(),
);
let res = if let Ok(input) = syn::parse::<ItemStruct>(input.clone()) {
struct_ser(&input, cratename)
} else if let Ok(input) = syn::parse::<ItemEnum>(input.clone()) {
enum_ser(&input, cratename)
} else if let Ok(input) = syn::parse::<ItemUnion>(input.clone()) {
union_ser(&input, cratename)
} else {
unreachable!()
};
TokenStream::from(match res {
Ok(res) => res,
Err(err) => err.to_compile_error(),
})
}
#[proc_macro_derive(BorshDeserialize, attributes(borsh_skip, borsh_init))]
pub fn borsh_deserialize(input: TokenStream) -> TokenStream {
let cratename = Ident::new(
&crate_name("borsh").unwrap_or("borsh".to_string()),
Span::call_site(),
);
let res = if let Ok(input) = syn::parse::<ItemStruct>(input.clone()) {
struct_de(&input, cratename)
} else if let Ok(input) = syn::parse::<ItemEnum>(input.clone()) {
enum_de(&input, cratename)
} else if let Ok(input) = syn::parse::<ItemUnion>(input.clone()) {
union_de(&input, cratename)
} else {
unreachable!()
};
TokenStream::from(match res {
Ok(res) => res,
Err(err) => err.to_compile_error(),
})
}
#[proc_macro_derive(BorshSchema, attributes(borsh_skip))]
pub fn borsh_schema(input: TokenStream) -> TokenStream {
let cratename = Ident::new(
&crate_name("borsh").unwrap_or("borsh".to_string()),
Span::call_site(),
);
let res = if let Ok(input) = syn::parse::<ItemStruct>(input.clone()) {
process_struct(&input, cratename)
} else if let Ok(input) = syn::parse::<ItemEnum>(input.clone()) {
process_enum(&input, cratename)
} else if let Ok(_) = syn::parse::<ItemUnion>(input.clone()) {
Err(syn::Error::new(
Span::call_site(),
"Borsh schema does not support unions yet.",
))
} else {
unreachable!()
};
TokenStream::from(match res {
Ok(res) => res,
Err(err) => err.to_compile_error(),
})
}