buf macros -> azalea-buf-macros

1 files changed, 0 insertions, 182 deletions

diff --git a/azalea-buf/buf-macros/src/lib.rs b/azalea-buf/buf-macros/src/lib.rs
deleted file mode 100644
index 43e60e6e..00000000
--- a/azalea-buf/buf-macros/src/lib.rs
+++ /dev/null
@@ -1,182 +0,0 @@
-use proc_macro::TokenStream;
-use quote::{quote, ToTokens};
-use syn::{self, parse_macro_input, Data, DeriveInput, FieldsNamed, Ident};
-
-fn create_impl_mcbufreadable(ident: &Ident, data: &Data) -> proc_macro2::TokenStream {
-    match data {
-        syn::Data::Struct(syn::DataStruct { fields, .. }) => {
-            let FieldsNamed { named, .. } = match fields {
-                syn::Fields::Named(f) => f,
-                _ => panic!("#[derive(McBuf)] can only be used on structs with named fields"),
-            };
-
-            let read_fields = named
-                .iter()
-                .map(|f| {
-                    let field_name = &f.ident;
-                    let field_type = &f.ty;
-                    // do a different buf.write_* for each field depending on the type
-                    // if it's a string, use buf.write_string
-                    match field_type {
-                        syn::Type::Path(_) | syn::Type::Array(_) => {
-                            if f.attrs.iter().any(|a| a.path.is_ident("var")) {
-                                quote! {
-                                    let #field_name = azalea_buf::McBufVarReadable::var_read_from(buf)?;
-                                }
-                            } else {
-                                quote! {
-                                    let #field_name = azalea_buf::McBufReadable::read_from(buf)?;
-                                }
-                            }
-                        }
-                        _ => panic!(
-                            "Error reading field {}: {}",
-                            field_name.clone().unwrap(),
-                            field_type.to_token_stream()
-                        ),
-                    }
-                })
-                .collect::<Vec<_>>();
-            let read_field_names = named.iter().map(|f| &f.ident).collect::<Vec<_>>();
-
-            quote! {
-            impl azalea_buf::McBufReadable for #ident {
-                fn read_from(buf: &mut impl std::io::Read) -> Result<Self, azalea_buf::BufReadError> {
-                    #(#read_fields)*
-                    Ok(#ident {
-                        #(#read_field_names: #read_field_names),*
-                    })
-                }
-            }
-            }
-        }
-        syn::Data::Enum(syn::DataEnum { variants, .. }) => {
-            let mut match_contents = quote!();
-            let mut variant_discrim: u32 = 0;
-            for variant in variants {
-                let variant_name = &variant.ident;
-                match &variant.discriminant.as_ref() {
-                    Some(d) => {
-                        variant_discrim = match &d.1 {
-                            syn::Expr::Lit(e) => match &e.lit {
-                                syn::Lit::Int(i) => i.base10_parse().unwrap(),
-                                _ => panic!("Error parsing enum discriminant as int"),
-                            },
-                            syn::Expr::Unary(_) => {
-                                panic!("Negative enum discriminants are not supported")
-                            }
-                            _ => {
-                                panic!("Error parsing enum discriminant as literal (is {:?})", d.1)
-                            }
-                        }
-                    }
-                    None => {
-                        variant_discrim += 1;
-                    }
-                }
-                match_contents.extend(quote! {
-                    #variant_discrim => Ok(Self::#variant_name),
-                });
-            }
-
-            quote! {
-            impl azalea_buf::McBufReadable for #ident {
-                fn read_from(buf: &mut impl std::io::Read) -> Result<Self, azalea_buf::BufReadError>
-                {
-                    let id = azalea_buf::McBufVarReadable::var_read_from(buf)?;
-                    match id {
-                        #match_contents
-                        _ => Err(azalea_buf::BufReadError::UnexpectedEnumVariant { id: id as i32 }),
-                    }
-                }
-            }
-            }
-        }
-        _ => panic!("#[derive(McBuf)] can only be used on structs"),
-    }
-}
-
-fn create_impl_mcbufwritable(ident: &Ident, data: &Data) -> proc_macro2::TokenStream {
-    match data {
-        syn::Data::Struct(syn::DataStruct { fields, .. }) => {
-            let FieldsNamed { named, .. } = match fields {
-                syn::Fields::Named(f) => f,
-                _ => panic!("#[derive(McBuf)] can only be used on structs with named fields"),
-            };
-
-            let write_fields = named
-            .iter()
-            .map(|f| {
-                let field_name = &f.ident;
-                let field_type = &f.ty;
-                // do a different buf.write_* for each field depending on the type
-                // if it's a string, use buf.write_string
-                match field_type {
-                    syn::Type::Path(_) | syn::Type::Array(_) => {
-                        if f.attrs.iter().any(|attr| attr.path.is_ident("var")) {
-                            quote! {
-                                azalea_buf::McBufVarWritable::var_write_into(&self.#field_name, buf)?;
-                            }
-                        } else {
-                            quote! {
-                                azalea_buf::McBufWritable::write_into(&self.#field_name, buf)?;
-                            }
-                        }
-                    }
-                    _ => panic!(
-                        "Error writing field {}: {}",
-                        field_name.clone().unwrap(),
-                        field_type.to_token_stream()
-                    ),
-                }
-            })
-            .collect::<Vec<_>>();
-
-            quote! {
-                impl azalea_buf::McBufWritable for #ident {
-                    fn write_into(&self, buf: &mut impl std::io::Write) -> Result<(), std::io::Error> {
-                        #(#write_fields)*
-                        Ok(())
-                    }
-                }
-            }
-        }
-        syn::Data::Enum(syn::DataEnum { .. }) => {
-            quote! {
-                impl azalea_buf::McBufWritable for #ident {
-                    fn write_into(&self, buf: &mut impl std::io::Write) -> Result<(), std::io::Error> {
-                        azalea_buf::Writable::write_varint(buf, *self as i32)
-                    }
-                }
-            }
-        }
-        _ => panic!("#[derive(McBuf)] can only be used on structs"),
-    }
-}
-
-#[proc_macro_derive(McBufReadable, attributes(var))]
-pub fn derive_mcbufreadable(input: TokenStream) -> TokenStream {
-    let DeriveInput { ident, data, .. } = parse_macro_input!(input);
-
-    create_impl_mcbufreadable(&ident, &data).into()
-}
-
-#[proc_macro_derive(McBufWritable, attributes(var))]
-pub fn derive_mcbufwritable(input: TokenStream) -> TokenStream {
-    let DeriveInput { ident, data, .. } = parse_macro_input!(input);
-
-    create_impl_mcbufwritable(&ident, &data).into()
-}
-
-#[proc_macro_derive(McBuf, attributes(var))]
-pub fn derive_mcbuf(input: TokenStream) -> TokenStream {
-    let DeriveInput { ident, data, .. } = parse_macro_input!(input);
-
-    let writable = create_impl_mcbufwritable(&ident, &data);
-    let readable = create_impl_mcbufreadable(&ident, &data);
-    quote! {
-        #writable
-        #readable
-    }
-    .into()
-}