Merge pull request #1005 from sfackler/dependabot/cargo/syn-2.0

Update syn requirement from 1.0 to 2.0

postgres-derive/Cargo.toml

@@ -12,6 +12,6 @@ proc-macro = true
 test = false
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 proc-macro2 = "1.0"
 quote = "1.0"

postgres-derive/src/fromsql.rs

@@ -3,10 +3,10 @@ use quote::{format_ident, quote};
 use std::iter;
 use syn::{
     punctuated::Punctuated, token, AngleBracketedGenericArguments, Data, DataStruct, DeriveInput,
-    Error, Fields, GenericArgument, GenericParam, Generics, Ident, Lifetime, LifetimeDef,
-    PathArguments, PathSegment,
+    Error, Fields, GenericArgument, GenericParam, Generics, Ident, Lifetime, PathArguments,
+    PathSegment,
 };
-use syn::{TraitBound, TraitBoundModifier, TypeParamBound};
+use syn::{LifetimeParam, TraitBound, TraitBoundModifier, TypeParamBound};
 
 use crate::accepts;
 use crate::composites::Field;
@@ -96,9 +96,9 @@ pub fn expand_derive_fromsql(input: DeriveInput) -> Result<TokenStream, Error> {
     let (impl_generics, _, _) = generics.split_for_impl();
     let (_, ty_generics, where_clause) = input.generics.split_for_impl();
     let out = quote! {
-        impl#impl_generics postgres_types::FromSql<#lifetime> for #ident#ty_generics #where_clause {
+        impl #impl_generics postgres_types::FromSql<#lifetime> for #ident #ty_generics #where_clause {
             fn from_sql(_type: &postgres_types::Type, buf: &#lifetime [u8])
-                        -> std::result::Result<#ident#ty_generics,
+                        -> std::result::Result<#ident #ty_generics,
                                                std::boxed::Box<dyn std::error::Error +
                                                                std::marker::Sync +
                                                                std::marker::Send>> {
@@ -217,7 +217,7 @@ fn build_generics(source: &Generics) -> (Generics, Lifetime) {
     let mut out = append_generic_bound(source.to_owned(), &new_fromsql_bound(&lifetime));
     out.params.insert(
         0,
-        GenericParam::Lifetime(LifetimeDef::new(lifetime.to_owned())),
+        GenericParam::Lifetime(LifetimeParam::new(lifetime.to_owned())),
     );
 
     (out, lifetime)

postgres-derive/src/overrides.rs

@@ -1,4 +1,5 @@
-use syn::{Attribute, Error, Lit, Meta, NestedMeta};
+use syn::punctuated::Punctuated;
+use syn::{Attribute, Error, Expr, ExprLit, Lit, Meta, Token};
 
 pub struct Overrides {
     pub name: Option<String>,
@@ -13,26 +14,28 @@ impl Overrides {
         };
 
         for attr in attrs {
-            let attr = attr.parse_meta()?;
-
             if !attr.path().is_ident("postgres") {
                 continue;
             }
 
-            let list = match attr {
+            let list = match &attr.meta {
                 Meta::List(ref list) => list,
                 bad => return Err(Error::new_spanned(bad, "expected a #[postgres(...)]")),
             };
 
-            for item in &list.nested {
+            let nested = list.parse_args_with(Punctuated::<Meta, Token![,]>::parse_terminated)?;
+
+            for item in nested {
                 match item {
-                    NestedMeta::Meta(Meta::NameValue(meta)) => {
+                    Meta::NameValue(meta) => {
                         if !meta.path.is_ident("name") {
                             return Err(Error::new_spanned(&meta.path, "unknown override"));
                         }
 
-                        let value = match &meta.lit {
-                            Lit::Str(s) => s.value(),
+                        let value = match &meta.value {
+                            Expr::Lit(ExprLit {
+                                lit: Lit::Str(lit), ..
+                            }) => lit.value(),
                             bad => {
                                 return Err(Error::new_spanned(bad, "expected a string literal"))
                             }
@@ -40,7 +43,7 @@ impl Overrides {
 
                         overrides.name = Some(value);
                     }
-                    NestedMeta::Meta(Meta::Path(ref path)) => {
+                    Meta::Path(path) => {
                         if !path.is_ident("transparent") {
                             return Err(Error::new_spanned(path, "unknown override"));
                         }