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Look inside of None-delimited groups when examining types

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This commit is contained in:
David Tolnay
2020-05-29 17:58:34 -07:00
parent f7d06cae4c
commit c45a809d5c
5 changed files with 21 additions and 12 deletions
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serde_derive/src/internals/attr.rs
+6 -6
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@@ -1,5 +1,5 @@
use internals::symbol::*;
use internals::Ctxt;
use internals::{ungroup, Ctxt};
use proc_macro2::{Group, Span, TokenStream, TokenTree};
use quote::ToTokens;
use std::borrow::Cow;
@@ -1737,7 +1737,7 @@ fn is_implicitly_borrowed_reference(ty: &syn::Type) -> bool {
// cow: Cow<'a, str>,
// }
fn is_cow(ty: &syn::Type, elem: fn(&syn::Type) -> bool) -> bool {
let path = match ty {
let path = match ungroup(ty) {
syn::Type::Path(ty) => &ty.path,
_ => {
return false;
@@ -1764,7 +1764,7 @@ fn is_cow(ty: &syn::Type, elem: fn(&syn::Type) -> bool) -> bool {
}
fn is_option(ty: &syn::Type, elem: fn(&syn::Type) -> bool) -> bool {
let path = match ty {
let path = match ungroup(ty) {
syn::Type::Path(ty) => &ty.path,
_ => {
return false;
@@ -1811,7 +1811,7 @@ fn is_option(ty: &syn::Type, elem: fn(&syn::Type) -> bool) -> bool {
// r: &'a str,
// }
fn is_reference(ty: &syn::Type, elem: fn(&syn::Type) -> bool) -> bool {
match ty {
match ungroup(ty) {
syn::Type::Reference(ty) => ty.mutability.is_none() && elem(&ty.elem),
_ => false,
}
@@ -1822,14 +1822,14 @@ fn is_str(ty: &syn::Type) -> bool {
}
fn is_slice_u8(ty: &syn::Type) -> bool {
match ty {
match ungroup(ty) {
syn::Type::Slice(ty) => is_primitive_type(&ty.elem, "u8"),
_ => false,
}
}
fn is_primitive_type(ty: &syn::Type, primitive: &str) -> bool {
match ty {
match ungroup(ty) {
syn::Type::Path(ty) => ty.qself.is_none() && is_primitive_path(&ty.path, primitive),
_ => false,
}