mysql_common_derive/from_value/structs/attrs/
container.rsuse std::str::FromStr;
use darling::{util::SpannedValue, FromMeta};
use proc_macro::LexError;
use syn::{parse::Parse, punctuated::Punctuated};
use crate::from_value::enums::attrs::container::Crate;
#[derive(Default, FromMeta)]
pub struct Mysql {
#[darling(default)]
pub crate_name: Crate,
#[darling(default)]
pub bound: Option<Bound>,
#[darling(default)]
pub deserialize_with: Option<SpannedValue<FnPath>>,
#[darling(default)]
pub serialize_with: Option<SpannedValue<FnPath>>,
}
#[derive(Debug)]
pub struct FnPath(pub syn::Path);
impl Parse for FnPath {
fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
syn::Path::parse(input).map(Self)
}
}
impl FromMeta for FnPath {
fn from_string(value: &str) -> darling::Result<Self> {
syn::parse::<syn::Path>(
FromStr::from_str(value)
.map_err(|e: LexError| darling::Error::unsupported_format(&e.to_string()))?,
)
.map_err(|e| darling::Error::unsupported_format(&e.to_string()))
.map(Self)
}
}
pub struct Bound(pub Punctuated<syn::GenericParam, syn::Token![,]>);
impl Parse for Bound {
fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
Punctuated::<syn::GenericParam, syn::Token![,]>::parse_terminated(input).map(Self)
}
}
impl FromMeta for Bound {
fn from_string(value: &str) -> darling::Result<Self> {
syn::parse::<Self>(
FromStr::from_str(value)
.map_err(|e: LexError| darling::Error::unsupported_format(&e.to_string()))?,
)
.map_err(|e| darling::Error::unsupported_format(&e.to_string()))
}
}