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https://codeberg.org/unspeaker/tengri.git
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dsl: use only Dsl trait
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parent
3bc739328e
commit
90f5699fff
11 changed files with 430 additions and 406 deletions
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@ -52,49 +52,111 @@ impl CommandImpl {
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impl ToTokens for CommandDef {
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fn to_tokens (&self, out: &mut TokenStream2) {
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let Self(CommandMeta(target), CommandImpl(block, exposed)) = self;
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let enumeration = &block.self_ty;
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let variants = exposed.values().map(|x|x.to_enum_variant_def());
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let matchers = exposed.values().map(CommandArm::to_matcher);
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let implementations = exposed.values().map(CommandArm::to_implementation);
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let Self(CommandMeta(state), CommandImpl(block, exposed)) = self;
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let command_enum = &block.self_ty;
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let variants = exposed.values().map(|arm|{
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let mut out = TokenStream2::new();
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out.append(arm.to_enum_variant_ident());
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//let ident = &arm.0;
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if arm.has_args() {
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out.append(Group::new(Delimiter::Brace, {
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let mut out = TokenStream2::new();
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for (arg, ty) in arm.args() {
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write_quote_to(&mut out, quote! { #arg : #ty , });
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}
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out
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}));
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}
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out.append(Punct::new(',', Alone));
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out
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});
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let matchers = exposed.values().map(|arm|{
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let key = LitStr::new(&arm.to_key(), Span::call_site());
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let variant = {
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let mut out = TokenStream2::new();
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out.append(arm.to_enum_variant_ident());
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let ident = &arm.0;
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if arm.has_args() {
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out.append(Group::new(Delimiter::Brace, {
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let mut out = TokenStream2::new();
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for (arg, ty) in arm.args() {
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write_quote_to(&mut out, quote! {
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#arg: Dsl::take_or_fail(self, words)?,
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});
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}
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out
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}));
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}
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out
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};
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write_quote(quote! {
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Some(::tengri::dsl::Token { value: ::tengri::dsl::Value::Key(#key), .. }) => {
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let mut words = words.clone();
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Some(#command_enum::#variant)
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},
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//Some(::tengri::dsl::Token {
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//value: ::tengri::dsl::Value::Key(#key), ..
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//}) => {
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//let mut iter = iter.clone(); Some(#command_enum::#variant)
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//},
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})
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});
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let implementations = exposed.values().map(|arm|{
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let ident = &arm.0;
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let variant = {
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let mut out = TokenStream2::new();
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out.append(arm.to_enum_variant_ident());
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//let ident = &arm.0;
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if arm.has_args() {
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out.append(Group::new(Delimiter::Brace, {
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let mut out = TokenStream2::new();
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for (arg, _ty) in arm.args() {
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write_quote_to(&mut out, quote! { #arg , });
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}
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out
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}));
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}
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out
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};
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let give_rest = write_quote(quote! { /*TODO*/ });
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let give_args = arm.args()
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.map(|(arg, _ty)|write_quote(quote! { #arg, }))
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.collect::<Vec<_>>();
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write_quote(quote! {
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#command_enum::#variant =>
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#command_enum::#ident(state, #(#give_args)* #give_rest),
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})
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});
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write_quote_to(out, quote! {
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/// Generated by [tengri_proc].
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#[derive(Clone, Debug)]
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pub enum #enumeration {
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#(#variants)*
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}
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#[derive(Clone, Debug)] pub enum #command_enum { #(#variants)* }
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/// Not generated by [tengri_proc].
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#block
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/// Generated by [tengri_proc].
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impl<'state> ::tengri::dsl::TryFromDsl<'state, #target> for #enumeration {
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fn try_from_expr <'source: 'state> (
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state: &'state #target, iter: &mut ::tengri::dsl::TokenIter<'source>
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) -> Option<Self> {
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let mut iter = iter.clone();
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let token = iter.next();
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match token {
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#(#matchers)*
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_ => None
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}
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impl ::tengri::input::Command<#state> for #command_enum {
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fn execute (self, state: &mut #state) -> Perhaps<Self> {
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match self { #(#implementations)* }
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}
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}
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/// Generated by [tengri_proc].
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impl<'state> ::tengri::dsl::Context<'state, #enumeration> for #target {
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fn get <'source> (&self, iter: &mut ::tengri::dsl::TokenIter<'source>)
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-> Option<#enumeration>
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impl ::tengri::dsl::Dsl<#command_enum> for #state {
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fn take <'source, 'state> (
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&'state self, words: &mut TokenIter<'source>
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)
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-> ::tengri::Perhaps<#command_enum>
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{
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use ::tengri::dsl::TryFromDsl;
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#enumeration::try_from_expr(self, iter)
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}
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}
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/// Generated by [tengri_proc].
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impl ::tengri::input::Command<#target> for #enumeration {
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fn execute (self, state: &mut #target) -> Perhaps<Self> {
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match self {
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#(#implementations)*
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}
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let mut words = words.clone();
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let token = words.next();
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todo!()//Ok(match token { #(#matchers)* _ => None })
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}
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}
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});
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//if exposed.len() > 0 {
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//panic!("{:#?}", block.self_ty);
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//if let Type::Path(ref path) = *block.self_ty {
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@ -146,61 +208,4 @@ impl CommandArm {
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out.append(Punct::new(',', Alone));
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out
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}
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fn to_enum_variant_bind (&self) -> TokenStream2 {
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let mut out = TokenStream2::new();
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out.append(self.to_enum_variant_ident());
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let ident = &self.0;
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if self.has_args() {
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out.append(Group::new(Delimiter::Brace, {
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let mut out = TokenStream2::new();
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for (arg, ty) in self.args() {
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//let take_err = LitStr::new(&format!("{}: missing argument \"{}\" ({})",
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//quote!{#ident}, quote!{#arg}, quote!{#ty}), Span::call_site());
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let give_err = format!("{}: missing value for \"{}\" ({}): {{:#?}}",
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quote!{#ident}, quote!{#arg}, quote!{#ty});
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let give_err = LitStr::new(&give_err, Span::call_site());
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write_quote_to(&mut out, quote! {
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#arg: ::tengri::dsl::Context::get(state, &mut iter)
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.unwrap_or_else(||panic!(#give_err, token)),
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});
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}
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out
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}));
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}
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out
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}
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fn to_enum_variant_unbind (&self) -> TokenStream2 {
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let mut out = TokenStream2::new();
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out.append(self.to_enum_variant_ident());
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//let ident = &self.0;
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if self.has_args() {
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out.append(Group::new(Delimiter::Brace, {
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let mut out = TokenStream2::new();
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for (arg, _ty) in self.args() {
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write_quote_to(&mut out, quote! { #arg , });
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}
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out
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}));
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}
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out
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}
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fn to_matcher (&self) -> TokenStream2 {
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let key = LitStr::new(&self.to_key(), Span::call_site());
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let variant = self.to_enum_variant_bind();
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let pattern = quote! {
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Some(::tengri::dsl::Token { value: ::tengri::dsl::Value::Key(#key), .. })
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};
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write_quote(quote! {
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#pattern => { let mut iter = iter.clone(); Some(Self::#variant) },
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})
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}
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fn to_implementation (&self) -> TokenStream2 {
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let ident = &self.0;
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let variant = self.to_enum_variant_unbind();
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let give_rest = write_quote(quote! { /*TODO*/ });
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let give_args = self.args()
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.map(|(arg, _ty)|write_quote(quote! { #arg, }))
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.collect::<Vec<_>>();
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write_quote(quote! { Self::#variant => Self::#ident(state, #(#give_args)* #give_rest), })
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}
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}
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