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Allow actual function name that is the same as a #[rhai_fn(name = "...")] rename.

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This commit is contained in:
Stephen Chung 2020-09-25 23:07:18 +08:00
parent 4efe6b90e7
commit 6b13e266b9
1 changed files with 23 additions and 17 deletions
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40
codegen/src/rhai_module.rs
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@ -183,25 +183,29 @@ pub(crate) fn flatten_type_groups(ty: &syn::Type) -> &syn::Type {
}
pub(crate) fn check_rename_collisions(fns: &Vec<ExportedFn>) -> Result<(), syn::Error> {
fn make_key(name: String, itemfn: &ExportedFn) -> String {
itemfn.arg_list().fold(name, |mut argstr, fnarg| {
let type_string: String = match fnarg {
syn::FnArg::Receiver(_) => unimplemented!("receiver rhai_fns not implemented"),
syn::FnArg::Typed(syn::PatType { ref ty, .. }) => {
ty.as_ref().to_token_stream().to_string()
}
};
argstr.push('.');
argstr.push_str(&type_string);
argstr
})
}
let mut renames = HashMap::<String, proc_macro2::Span>::new();
let mut names = HashMap::<String, proc_macro2::Span>::new();
let mut fn_names = HashMap::<String, proc_macro2::Span>::new();
let mut fn_sig = HashMap::<String, proc_macro2::Span>::new();
for itemfn in fns.iter() {
if let Some(ref names) = itemfn.params().name {
for name in names {
let current_span = itemfn.params().span.as_ref().unwrap();
let key = itemfn.arg_list().fold(name.clone(), |mut argstr, fnarg| {
let type_string: String = match fnarg {
syn::FnArg::Receiver(_) => {
unimplemented!("receiver rhai_fns not implemented")
}
syn::FnArg::Typed(syn::PatType { ref ty, .. }) => {
ty.as_ref().to_token_stream().to_string()
}
};
argstr.push('.');
argstr.push_str(&type_string);
argstr
});
let key = make_key(name.clone(), itemfn);
if let Some(other_span) = renames.insert(key, *current_span) {
let mut err = syn::Error::new(
*current_span,
@ -216,7 +220,7 @@ pub(crate) fn check_rename_collisions(fns: &Vec<ExportedFn>) -> Result<(), syn::
}
} else {
let ident = itemfn.name();
if let Some(other_span) = names.insert(ident.to_string(), ident.span()) {
if let Some(other_span) = fn_names.insert(ident.to_string(), ident.span()) {
let mut err = syn::Error::new(
ident.span(),
format!("duplicate function '{}'", ident.to_string()),
@ -227,11 +231,13 @@ pub(crate) fn check_rename_collisions(fns: &Vec<ExportedFn>) -> Result<(), syn::
));
return Err(err);
}
let key = make_key(ident.to_string(), itemfn);
fn_sig.insert(key, ident.span());
}
}
for (new_name, attr_span) in renames.drain() {
let new_name = new_name.split('.').next().unwrap();
if let Some(fn_span) = names.get(new_name) {
if let Some(fn_span) = fn_sig.get(&new_name) {
let mut err = syn::Error::new(
attr_span,
format!("duplicate Rhai signature for '{}'", &new_name),