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Add CloneGetters #112

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Merged
jbaublitz merged 1 commit into from
Jun 11, 2025
Merged

Add CloneGetters #112

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52 changes: 37 additions & 15 deletions src/generate.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ use syn::{
self, ext::IdentExt, spanned::Spanned, Expr, Field, Lit, Meta, MetaNameValue, Visibility,
};

use self::GenMode::{Get, GetCopy, GetMut, Set, SetWith};
use self::GenMode::{Get, GetClone, GetCopy, GetMut, Set, SetWith};
use super::parse_attr;

pub struct GenParams {
Expand All @@ -15,6 +15,7 @@ pub struct GenParams {
#[derive(PartialEq, Eq, Copy, Clone)]
pub enum GenMode {
Get,
GetClone,
GetCopy,
GetMut,
Set,
Expand All @@ -25,6 +26,7 @@ impl GenMode {
pub fn name(self) -> &'static str {
match self {
Get => "get",
GetClone => "get_clone",
GetCopy => "get_copy",
GetMut => "get_mut",
Set => "set",
Expand All @@ -34,23 +36,23 @@ impl GenMode {

pub fn prefix(self) -> &'static str {
match self {
Get | GetCopy | GetMut => "",
Get | GetClone | GetCopy | GetMut => "",
Set => "set_",
SetWith => "with_",
}
}

pub fn suffix(self) -> &'static str {
match self {
Get | GetCopy | Set | SetWith => "",
Get | GetClone | GetCopy | Set | SetWith => "",
GetMut => "_mut",
}
}

fn is_get(self) -> bool {
match self {
GenMode::Get | GenMode::GetCopy | GenMode::GetMut => true,
GenMode::Set | GenMode::SetWith => false,
Get | GetClone | GetCopy | GetMut => true,
Set | SetWith => false,
}
}
}
Expand Down Expand Up @@ -112,6 +114,7 @@ fn has_prefix_attr(f: &Field, params: &GenParams) -> bool {
.filter_map(|attr| parse_attr(attr, params.mode))
.find(|meta| {
meta.path().is_ident("get")
|| meta.path().is_ident("get_clone")
|| meta.path().is_ident("get_copy")
|| meta.path().is_ident("get_mut")
})
Expand Down Expand Up @@ -167,7 +170,7 @@ pub fn implement(field: &Field, params: &GenParams) -> TokenStream2 {
// Generate nothing for skipped field
Some(meta) if meta.path().is_ident("skip") => quote! {},
Some(_) => match params.mode {
GenMode::Get => {
Get => {
quote! {
#(#doc)*
#[inline(always)]
Expand All @@ -176,7 +179,16 @@ pub fn implement(field: &Field, params: &GenParams) -> TokenStream2 {
}
}
}
GenMode::GetCopy => {
GetClone => {
quote! {
#(#doc)*
#[inline(always)]
#visibility fn #fn_name(&self) -> #ty {
self.#field_name.clone()
}
}
}
GetCopy => {
quote! {
#(#doc)*
#[inline(always)]
Expand All @@ -185,7 +197,7 @@ pub fn implement(field: &Field, params: &GenParams) -> TokenStream2 {
}
}
}
GenMode::Set => {
Set => {
quote! {
#(#doc)*
#[inline(always)]
Expand All @@ -195,7 +207,7 @@ pub fn implement(field: &Field, params: &GenParams) -> TokenStream2 {
}
}
}
GenMode::GetMut => {
GetMut => {
quote! {
#(#doc)*
#[inline(always)]
Expand All @@ -204,7 +216,7 @@ pub fn implement(field: &Field, params: &GenParams) -> TokenStream2 {
}
}
}
GenMode::SetWith => {
SetWith => {
quote! {
#(#doc)*
#[inline(always)]
Expand Down Expand Up @@ -234,7 +246,7 @@ pub fn implement_for_unnamed(field: &Field, params: &GenParams) -> TokenStream2
// Generate nothing for skipped field
Some(meta) if meta.path().is_ident("skip") => quote! {},
Some(_) => match params.mode {
GenMode::Get => {
Get => {
let fn_name = Ident::new("get", Span::call_site());
quote! {
#(#doc)*
Expand All @@ -244,7 +256,17 @@ pub fn implement_for_unnamed(field: &Field, params: &GenParams) -> TokenStream2
}
}
}
GenMode::GetCopy => {
GetClone => {
let fn_name = Ident::new("get", Span::call_site());
quote! {
#(#doc)*
#[inline(always)]
#visibility fn #fn_name(&self) -> #ty {
self.0.clone()
}
}
}
GetCopy => {
let fn_name = Ident::new("get", Span::call_site());
quote! {
#(#doc)*
Expand All @@ -254,7 +276,7 @@ pub fn implement_for_unnamed(field: &Field, params: &GenParams) -> TokenStream2
}
}
}
GenMode::Set => {
Set => {
let fn_name = Ident::new("set", Span::call_site());
quote! {
#(#doc)*
Expand All @@ -265,7 +287,7 @@ pub fn implement_for_unnamed(field: &Field, params: &GenParams) -> TokenStream2
}
}
}
GenMode::GetMut => {
GetMut => {
let fn_name = Ident::new("get_mut", Span::call_site());
quote! {
#(#doc)*
Expand All @@ -275,7 +297,7 @@ pub fn implement_for_unnamed(field: &Field, params: &GenParams) -> TokenStream2
}
}
}
GenMode::SetWith => {
SetWith => {
let fn_name = Ident::new("set_with", Span::call_site());
quote! {
#(#doc)*
Expand Down
13 changes: 13 additions & 0 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -226,6 +226,18 @@ pub fn getters(input: TokenStream) -> TokenStream {
produce(&ast, &params).into()
}

#[proc_macro_derive(CloneGetters, attributes(get_clone, with_prefix, getset))]
#[proc_macro_error]
pub fn clone_getters(input: TokenStream) -> TokenStream {
let ast = parse_macro_input!(input as DeriveInput);
let params = GenParams {
mode: GenMode::GetClone,
global_attr: parse_global_attr(&ast.attrs, GenMode::GetClone),
};

produce(&ast, &params).into()
}

#[proc_macro_derive(CopyGetters, attributes(get_copy, with_prefix, getset))]
#[proc_macro_error]
pub fn copy_getters(input: TokenStream) -> TokenStream {
Expand Down Expand Up @@ -292,6 +304,7 @@ fn parse_attr(attr: &syn::Attribute, mode: GenMode) -> Option<syn::Meta> {
.into_iter()
.inspect(|meta| {
if !(meta.path().is_ident("get")
|| meta.path().is_ident("get_clone")
|| meta.path().is_ident("get_copy")
|| meta.path().is_ident("get_mut")
|| meta.path().is_ident("set")
Expand Down
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