message: [lang] Use FnDecl::inputs_with_env. Fixes warnings.
diff: @@ -335,26 +335,7 @@ fn codegen_for_message_impls(tokens: &mut TokenStream2, contract: &hir::Contract
  fn_decl.fn_tok.to_tokens(&mut content);
  message.sig.ident.to_tokens(&mut content);
  fn_decl.paren_tok.surround(&mut content, |inner_toks| {
  - let inputs_with_env = {
  - let mut inputs_with_env: Punctuated<ast::FnArg, Token![,]> =
  - Punctuated::new();
  - let mut inputs_iter = fn_decl.inputs.iter();
  - let self_arg = inputs_iter.next().unwrap();
  - inputs_with_env.push_value(self_arg.clone());
  - inputs_with_env.push_punct(<Token![,]>::default());
  - let custom_arg_captured: CustomArgCaptured = if message.is_mut() {
  - syn::parse_quote! { env: &mut ink_model::EnvHandler }
  - } else {
  - syn::parse_quote! { env: &ink_model::EnvHandler }
  - };
  - inputs_with_env.push(ast::FnArg::Captured(
  - custom_arg_captured.into_arg_captured(),
  - ));
  - for input in inputs_iter {
  - inputs_with_env.push(input.clone())
  - }
  - inputs_with_env
  - };
  + let inputs_with_env = fn_decl.inputs_with_env();
  inputs_with_env.to_tokens(inner_toks);
  });
  fn_decl.output.to_tokens(&mut content);
  @@ -402,35 +383,6 @@ fn codegen_for_method_impls(tokens: &mut TokenStream2, contract: &hir::Contract)
  }
  }
  -struct CustomArgCaptured {
  - pub pat: syn::Pat,
  - pub colon_token: Token![:],
  - pub ty: syn::Type,
  -}
  -
  -impl syn::parse::Parse for CustomArgCaptured {
  - fn parse(input: syn::parse::ParseStream) -> syn::parse::Result<Self> {
  - let pat = input.parse()?;
  - let colon_token = input.parse()?;
  - let ty = input.parse()?;
  - Ok(Self {
  - pat,
  - colon_token,
  - ty,
  - })
  - }
  -}
  -
  -impl CustomArgCaptured {
  - pub fn into_arg_captured(self) -> syn::ArgCaptured {
  - syn::ArgCaptured {
  - pat: self.pat,
  - colon_token: self.colon_token,
  - ty: self.ty,
  - }
  - }
  -}
  -
  fn codegen_for_state(tokens: &mut TokenStream2, contract: &hir::Contract) {
  let state_attrs_toks = {
  let mut content = quote! {};
  