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Support alternative HashMap hasher #914

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Support alternative HashMap hasher #914

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8397630
Support alternative HashMap hasher
alexheretic Sep 11, 2023
287173f
Merge branch 'master' into hashmap-alt-hash
alexheretic Sep 18, 2023
7d00665
Merge branch 'master' into hashmap-alt-hash
alexheretic Sep 28, 2023
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61 changes: 43 additions & 18 deletions prost-derive/src/field/map.rs
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Original file line number Diff line number Diff line change
@@ -1,8 +1,7 @@
use anyhow::{bail, Error};
use proc_macro2::{Span, TokenStream};
use quote::quote;
use syn::punctuated::Punctuated;
use syn::{Expr, ExprLit, Ident, Lit, Meta, MetaNameValue, Token};
use syn::{punctuated::Punctuated, Expr, ExprLit, Ident, Lit, Meta, MetaNameValue, Token};

use crate::field::{scalar, set_option, tag_attr};

Expand Down Expand Up @@ -298,11 +297,6 @@ impl Field {
/// The Debug tries to convert any enumerations met into the variants if possible, instead of
/// outputting the raw numbers.
pub fn debug(&self, wrapper_name: TokenStream) -> TokenStream {
let type_name = match self.map_ty {
MapTy::HashMap => Ident::new("HashMap", Span::call_site()),
MapTy::BTreeMap => Ident::new("BTreeMap", Span::call_site()),
};

// A fake field for generating the debug wrapper
let key_wrapper = fake_scalar(self.key_ty.clone()).debug(quote!(KeyWrapper));
let key = self.key_ty.rust_type();
Expand Down Expand Up @@ -333,20 +327,51 @@ impl Field {
}

let value = ty.rust_type();
quote! {
struct #wrapper_name<'a>(&'a ::#libname::collections::#type_name<#key, #value>);
impl<'a> ::core::fmt::Debug for #wrapper_name<'a> {
#fmt
match self.map_ty {
MapTy::HashMap => {
let map = Ident::new("HashMap", Span::call_site());
quote! {
struct #wrapper_name<'a, S>(&'a ::#libname::collections::#map<#key, #value, S>);
impl<'a, S> ::core::fmt::Debug for #wrapper_name<'a, S> {
#fmt
}
}
}
MapTy::BTreeMap => {
let map = Ident::new("BTreeMap", Span::call_site());
quote! {
struct #wrapper_name<'a>(&'a ::#libname::collections::#map<#key, #value>);
impl<'a> ::core::fmt::Debug for #wrapper_name<'a> {
#fmt
}
}
}
}
}
ValueTy::Message => quote! {
struct #wrapper_name<'a, V: 'a>(&'a ::#libname::collections::#type_name<#key, V>);
impl<'a, V> ::core::fmt::Debug for #wrapper_name<'a, V>
where
V: ::core::fmt::Debug + 'a,
{
#fmt
ValueTy::Message => match self.map_ty {
MapTy::HashMap => {
let name = Ident::new("HashMap", Span::call_site());
quote! {
struct #wrapper_name<'a, V: 'a, S>(&'a ::#libname::collections::#name<#key, V, S>);
impl<'a, V, S> ::core::fmt::Debug for #wrapper_name<'a, V, S>
where
V: ::core::fmt::Debug + 'a,
{
#fmt
}
}
}
MapTy::BTreeMap => {
let map = Ident::new("BTreeMap", Span::call_site());
quote! {
struct #wrapper_name<'a, V: 'a>(&'a ::#libname::collections::#map<#key, V>);
impl<'a, V> ::core::fmt::Debug for #wrapper_name<'a, V>
where
V: ::core::fmt::Debug + 'a,
{
#fmt
}
}
}
},
}
Expand Down
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