19922182031

Committed 04 Dec 2025 08:16AM UTC coverage: 59.212% (+0.01%) from 59.201%

Build # 19922182031

Build Type

push

github

Committed by

fasterthanlime

Commit Message

fix: use explicit type annotations for generic enum variant constructors

When constructing enum variants to suppress dead_code warnings, use
explicit type annotations (e.g., `let _: E<T, C> = E::Unit;`) instead
of relying on type inference. This fixes compilation errors with
generic enums that have const generics or unused type parameters,
where the compiler couldn't infer all type parameters from the
variant constructor alone.

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86.91

/facet-macros-impl/src/process_enum.rs

use super::*;
use crate::{
    parsed::{IdentOrLiteral, PRepr, PVariantKind, PrimitiveRepr},
    process_struct::gen_field_from_pfield,
};
use quote::{format_ident, quote, quote_spanned};

/// Processes an enum to implement Facet
pub(crate) fn process_enum(parsed: Enum) -> TokenStream {
    // Use already-parsed PEnum, including container/variant/field attributes and rename rules
    let pe = PEnum::parse(&parsed);

    // Emit any collected errors as compile_error! with proper spans
    if !pe.container.attrs.errors.is_empty() {
        let errors = pe.container.attrs.errors.iter().map(|e| {
            let msg = &e.message;
            let span = e.span;
            quote_spanned! { span => compile_error!(#msg); }
        });
        return quote! { #(#errors)* };
    }

    let enum_name = &pe.container.name;
    let enum_name_str = enum_name.to_string();

    let opaque = pe
        .container
        .attrs
        .facet
        .iter()
        .any(|a| a.is_builtin() && a.key_str() == "opaque");

    // Get the facet crate path (custom or default ::facet)
    let facet_crate = pe.container.attrs.facet_crate();

    let type_name_fn =
        generate_type_name_fn(enum_name, parsed.generics.as_ref(), opaque, &facet_crate);

    let bgp = pe.container.bgp.clone();
    // Use the AST directly for where clauses and generics, as PContainer/PEnum doesn't store them
    let where_clauses_tokens = build_where_clauses(
        parsed.clauses.as_ref(),
        parsed.generics.as_ref(),
        opaque,
        &facet_crate,
    );
    let type_params = build_type_params(parsed.generics.as_ref(), opaque, &facet_crate);

    // Container-level docs from PAttrs
    let maybe_container_doc = match &pe.container.attrs.doc[..] {
        [] => quote! {},
        doc_lines => quote! { .doc(&[#(#doc_lines),*]) },
    };

    let container_attributes_tokens = {
        let mut attribute_tokens: Vec<TokenStream> = Vec::new();
        for attr in &pe.container.attrs.facet {
            // Skip crate attribute - it's handled specially
            if attr.is_builtin() && attr.key_str() == "crate" {
                continue;
            }
            // All attributes go through grammar dispatch
            let ext_attr = emit_attr(attr, &facet_crate);
            attribute_tokens.push(quote! { #ext_attr });
        }

        if attribute_tokens.is_empty() {
            quote! {}
        } else {
            quote! { .attributes(&const { [#(#attribute_tokens),*] }) }
        }
    };

    let type_tag_maybe = {
        if let Some(type_tag) = pe.container.attrs.get_builtin_args("type_tag") {
            quote! { .type_tag(#type_tag) }
        } else {
            quote! {}
        }
    };

    // Determine enum repr (already resolved by PEnum::parse())
    let valid_repr = &pe.repr;

    // Are these relevant for enums? Or is it always `repr(C)` if a `PrimitiveRepr` is present?
    let repr = match &valid_repr {
        PRepr::Transparent => unreachable!("this should be caught by PRepr::parse"),
        PRepr::Rust(_) => quote! { #facet_crate::Repr::default() },
        PRepr::C(_) => quote! { #facet_crate::Repr::c() },
        PRepr::RustcWillCatch => {
            // rustc will emit the error - return empty TokenStream
            return quote! {};
        }
    };

    // Helper for EnumRepr TS (token stream) generation for primitives
    let enum_repr_ts_from_primitive = |primitive_repr: PrimitiveRepr| -> TokenStream {
        let type_name_str = primitive_repr.type_name().to_string();
        let enum_repr_variant_ident = format_ident!("{}", type_name_str.to_uppercase());
        quote! { #facet_crate::EnumRepr::#enum_repr_variant_ident }
    };

    // --- Processing code for shadow struct/fields/variant_expressions ---
    // A. C-style enums have shadow-discriminant, shadow-union, shadow-struct
    // B. Primitive enums have simpler layout.
    let (shadow_struct_defs, variant_expressions, enum_repr_type_tokenstream) = match valid_repr {
        PRepr::C(prim_opt) => {
            // Shadow discriminant
            let shadow_discriminant_name =
                quote::format_ident!("__Shadow_CRepr_Discriminant_for_{}", enum_name_str);
            let all_variant_names: Vec<Ident> = pe
                .variants
                .iter()
                .map(|pv| match &pv.name.raw {
                    IdentOrLiteral::Ident(id) => id.clone(),
                    IdentOrLiteral::Literal(n) => format_ident!("_{}", n), // Should not happen for enums
                })
                .collect();

            let repr_attr_content = match prim_opt {
                Some(p) => p.type_name(),
                None => quote! { C },
            };
            let mut shadow_defs = vec![quote! {
                #[repr(#repr_attr_content)]
                #[allow(dead_code)]
                enum #shadow_discriminant_name { #(#all_variant_names),* }
            }];

            // Shadow union
            let shadow_union_name =
                quote::format_ident!("__Shadow_CRepr_Fields_Union_for_{}", enum_name_str);
            let facet_bgp = bgp.with_lifetime(LifetimeName(format_ident!("__facet")));
            let bgp_with_bounds = facet_bgp.display_with_bounds();
            let bgp_without_bounds = facet_bgp.display_without_bounds();
            let phantom_data = facet_bgp.display_as_phantom_data();
            let all_union_fields: Vec<TokenStream> = pe.variants.iter().map(|pv| {
                // Each field is named after the variant, struct for its fields.
                let variant_ident = match &pv.name.raw {
                    IdentOrLiteral::Ident(id) => id.clone(),
                     IdentOrLiteral::Literal(idx) => format_ident!("_{}", idx), // Should not happen
                };
                let shadow_field_name_ident = quote::format_ident!("__Shadow_CRepr_Field{}_{}", enum_name_str, variant_ident);
                quote! {
                    #variant_ident: ::core::mem::ManuallyDrop<#shadow_field_name_ident #bgp_without_bounds>
                }
            }).collect();

            shadow_defs.push(quote! {
                #[repr(C)]
                #[allow(non_snake_case, dead_code)]
                union #shadow_union_name #bgp_with_bounds #where_clauses_tokens { #(#all_union_fields),* }
            });

            // Shadow repr struct for enum as a whole
            let shadow_repr_name =
                quote::format_ident!("__Shadow_CRepr_Struct_for_{}", enum_name_str);
            shadow_defs.push(quote! {
                #[repr(C)]
                #[allow(non_snake_case)]
                #[allow(dead_code)]
                struct #shadow_repr_name #bgp_with_bounds #where_clauses_tokens {
                    _discriminant: #shadow_discriminant_name,
                    _phantom: #phantom_data,
                    _fields: #shadow_union_name #bgp_without_bounds,
                }
            });

            // Generate variant_expressions
            let mut discriminant: Option<&TokenStream> = None;
            let mut discriminant_offset: i64 = 0;
            let mut exprs = Vec::new();

            for pv in pe.variants.iter() {
                if let Some(dis) = &pv.discriminant {
                    discriminant = Some(dis);
                    discriminant_offset = 0;
                }

                let discriminant_ts = if let Some(discriminant) = discriminant {
                    if discriminant_offset > 0 {
                        quote! { #discriminant + #discriminant_offset }
                    } else {
                        quote! { #discriminant }
                    }
                } else {
                    quote! { #discriminant_offset }
                };

                let display_name = pv.name.effective.clone();
                let variant_attrs_tokens = {
                    let name_token = TokenTree::Literal(Literal::string(&display_name));
                    // All attributes go through grammar dispatch
                    if pv.attrs.facet.is_empty() {
                        quote! { .name(#name_token) }
                    } else {
                        let attrs_list: Vec<TokenStream> = pv
                            .attrs
                            .facet
                            .iter()
                            .map(|attr| {
                                let ext_attr = emit_attr(attr, &facet_crate);
                                quote! { #ext_attr }
                            })
                            .collect();
                        quote! { .name(#name_token).attributes(&const { [#(#attrs_list),*] }) }
                    }
                };

                let maybe_doc = match &pv.attrs.doc[..] {
                    [] => quote! {},
                    doc_lines => quote! { .doc(&[#(#doc_lines),*]) },
                };

                let shadow_struct_name = match &pv.name.raw {
                    IdentOrLiteral::Ident(id) => {
                        // Use the same naming convention as in the union definition
                        quote::format_ident!("__Shadow_CRepr_Field{}_{}", enum_name_str, id)
                    }
                    IdentOrLiteral::Literal(idx) => {
                        // Use the same naming convention as in the union definition
                        quote::format_ident!(
                            "__Shadow_CRepr_Field{}_{}",
                            enum_name_str,
                            format_ident!("_{}", idx) // Should not happen
                        )
                    }
                };

                let variant_offset = quote! {
                    ::core::mem::offset_of!(#shadow_repr_name #bgp_without_bounds, _fields)
                };

                // Determine field structure for the variant
                match &pv.kind {
                    PVariantKind::Unit => {
                        // Generate unit shadow struct for the variant
                        shadow_defs.push(quote! {
                            #[repr(C)]
                            #[allow(non_snake_case, dead_code)]
                            struct #shadow_struct_name #bgp_with_bounds #where_clauses_tokens { _phantom: #phantom_data }
                        });
                        exprs.push(quote! {
                            #facet_crate::Variant::builder()
                                #variant_attrs_tokens
                                .discriminant(#discriminant_ts as i64)
                                .data(#facet_crate::StructType::builder().repr(#facet_crate::Repr::c()).unit().build())
                                #maybe_doc
                                .build()
                        });
                    }
                    PVariantKind::Tuple { fields } => {
                        // Tuple shadow struct
                        let fields_with_types: Vec<TokenStream> = fields
                            .iter()
                            .enumerate()
                            .map(|(idx, pf)| {
                                let field_ident = format_ident!("_{}", idx);
                                let typ = &pf.ty;
                                quote! { #field_ident: #typ }
                            })
                            .collect();
                        shadow_defs.push(quote! {
                            #[repr(C)]
                            #[allow(non_snake_case, dead_code)]
                            struct #shadow_struct_name #bgp_with_bounds #where_clauses_tokens {
                                #(#fields_with_types),* ,
                                _phantom: #phantom_data
                            }
                        });
                        let field_defs: Vec<TokenStream> = fields
                            .iter()
                            .enumerate()
                            .map(|(idx, pf)| {
                                let mut pfield = pf.clone();
                                let field_ident = format_ident!("_{}", idx);
                                pfield.name.raw = IdentOrLiteral::Ident(field_ident);
                                gen_field_from_pfield(
                                    &pfield,
                                    &shadow_struct_name,
                                    &facet_bgp,
                                    Some(variant_offset.clone()),
                                    &facet_crate,
                                )
                            })
                            .collect();
                        exprs.push(quote! {{
                            let fields: &'static [#facet_crate::Field] = &const {[
                                #(#field_defs),*
                            ]};
                            #facet_crate::Variant::builder()
                                #variant_attrs_tokens
                                .discriminant(#discriminant_ts as i64)
                                .data(#facet_crate::StructType::builder().repr(#facet_crate::Repr::c()).tuple().fields(fields).build())
                                #maybe_doc
                                .build()
                        }});
                    }
                    PVariantKind::Struct { fields } => {
                        let fields_with_types: Vec<TokenStream> = fields
                            .iter()
                            .map(|pf| {
                                // Use raw name for struct field definition
                                let field_name = match &pf.name.raw {
                                    IdentOrLiteral::Ident(id) => quote! { #id },
                                    IdentOrLiteral::Literal(_) => {
                                        panic!("Struct variant cannot have literal field names")
                                    }
                                };
                                let typ = &pf.ty;
                                quote! { #field_name: #typ }
                            })
                            .collect();

                        // Handle empty fields case explicitly
                        let struct_fields = if fields_with_types.is_empty() {
                            // Only add phantom data for empty struct variants
                            quote! { _phantom: #phantom_data }
                        } else {
                            // Add fields plus phantom data for non-empty struct variants
                            quote! { #(#fields_with_types),*, _phantom: #phantom_data }
                        };
                        shadow_defs.push(quote! {
                            #[repr(C)]
                            #[allow(non_snake_case, dead_code)]
                            struct #shadow_struct_name #bgp_with_bounds #where_clauses_tokens {
                                #struct_fields
                            }
                        });

                        let field_defs: Vec<TokenStream> = fields
                            .iter()
                            .map(|pf| {
                                gen_field_from_pfield(
                                    pf,
                                    &shadow_struct_name,
                                    &facet_bgp,
                                    Some(variant_offset.clone()),
                                    &facet_crate,
                                )
                            })
                            .collect();

                        exprs.push(quote! {{
                            let fields: &'static [#facet_crate::Field] = &const {[
                                #(#field_defs),*
                            ]};
                            #facet_crate::Variant::builder()
                                #variant_attrs_tokens
                                .discriminant(#discriminant_ts as i64)
                                .data(#facet_crate::StructType::builder().repr(#facet_crate::Repr::c()).struct_().fields(fields).build())
                                #maybe_doc
                                .build()
                        }});
                    }
                };

                // C-style enums increment discriminant unless explicitly set
                discriminant_offset += 1;
            }

            // Generate the EnumRepr token stream
            let repr_type_ts = match prim_opt {
                None => {
                    quote! { #facet_crate::EnumRepr::from_discriminant_size::<#shadow_discriminant_name>() }
                }
                Some(p) => enum_repr_ts_from_primitive(*p),
            };

            (shadow_defs, exprs, repr_type_ts)
        }
        PRepr::Rust(Some(prim)) => {
            // Treat as primitive repr
            let facet_bgp = bgp.with_lifetime(LifetimeName(format_ident!("__facet")));
            let bgp_with_bounds = facet_bgp.display_with_bounds();
            let phantom_data = facet_bgp.display_as_phantom_data();
            let discriminant_rust_type = prim.type_name();
            let mut shadow_defs = Vec::new();

            // Generate variant_expressions
            let mut discriminant: Option<&TokenStream> = None;
            let mut discriminant_offset: i64 = 0;

            let mut exprs = Vec::new();

            for pv in pe.variants.iter() {
                if let Some(dis) = &pv.discriminant {
                    discriminant = Some(dis);
                    discriminant_offset = 0;
                }

                let discriminant_ts = if let Some(discriminant) = discriminant {
                    if discriminant_offset > 0 {
                        quote! { #discriminant + #discriminant_offset }
                    } else {
                        quote! { #discriminant }
                    }
                } else {
                    quote! { #discriminant_offset }
                };

                let display_name = pv.name.effective.clone();
                let variant_attrs_tokens = {
                    let name_token = TokenTree::Literal(Literal::string(&display_name));
                    // All attributes go through grammar dispatch
                    if pv.attrs.facet.is_empty() {
                        quote! { .name(#name_token) }
                    } else {
                        let attrs_list: Vec<TokenStream> = pv
                            .attrs
                            .facet
                            .iter()
                            .map(|attr| {
                                let ext_attr = emit_attr(attr, &facet_crate);
                                quote! { #ext_attr }
                            })
                            .collect();
                        quote! { .name(#name_token).attributes(&const { [#(#attrs_list),*] }) }
                    }
                };

                let maybe_doc = match &pv.attrs.doc[..] {
                    [] => quote! {},
                    doc_lines => quote! { .doc(&[#(#doc_lines),*]) },
                };

                match &pv.kind {
                    PVariantKind::Unit => {
                        exprs.push(quote! {
                            #facet_crate::Variant::builder()
                                #variant_attrs_tokens
                                .discriminant(#discriminant_ts as i64)
                                .data(#facet_crate::StructType::builder().repr(#facet_crate::Repr::c()).unit().build())
                                #maybe_doc
                                .build()
                        });
                    }
                    PVariantKind::Tuple { fields } => {
                        let shadow_struct_name = match &pv.name.raw {
                            IdentOrLiteral::Ident(id) => {
                                quote::format_ident!(
                                    "__Shadow_RustRepr_Tuple_for_{}_{}",
                                    enum_name_str,
                                    id
                                )
                            }
                            IdentOrLiteral::Literal(_) => {
                                panic!(
                                    "Enum variant names cannot be literals for tuple variants in #[repr(Rust)]"
                                )
                            }
                        };
                        let fields_with_types: Vec<TokenStream> = fields
                            .iter()
                            .enumerate()
                            .map(|(idx, pf)| {
                                let field_ident = format_ident!("_{}", idx);
                                let typ = &pf.ty;
                                quote! { #field_ident: #typ }
                            })
                            .collect();
                        shadow_defs.push(quote! {
                            #[repr(C)] // Layout variants like C structs
                            #[allow(non_snake_case, dead_code)]
                            struct #shadow_struct_name #bgp_with_bounds #where_clauses_tokens {
                                _discriminant: #discriminant_rust_type,
                                _phantom: #phantom_data,
                                #(#fields_with_types),*
                            }
                        });
                        let field_defs: Vec<TokenStream> = fields
                            .iter()
                            .enumerate()
                            .map(|(idx, pf)| {
                                let mut pf = pf.clone();
                                let field_ident = format_ident!("_{}", idx);
                                pf.name.raw = IdentOrLiteral::Ident(field_ident);
                                gen_field_from_pfield(
                                    &pf,
                                    &shadow_struct_name,
                                    &facet_bgp,
                                    None,
                                    &facet_crate,
                                )
                            })
                            .collect();
                        exprs.push(quote! {{
                            let fields: &'static [#facet_crate::Field] = &const {[
                                #(#field_defs),*
                            ]};
                            #facet_crate::Variant::builder()
                                #variant_attrs_tokens
                                .discriminant(#discriminant_ts as i64)
                                .data(#facet_crate::StructType::builder().repr(#facet_crate::Repr::c()).tuple().fields(fields).build())
                                #maybe_doc
                                .build()
                        }});
                    }
                    PVariantKind::Struct { fields } => {
                        let shadow_struct_name = match &pv.name.raw {
                            IdentOrLiteral::Ident(id) => {
                                // Use a more descriptive name, similar to the Tuple variant case
                                quote::format_ident!(
                                    "__Shadow_RustRepr_Struct_for_{}_{}",
                                    enum_name_str,
                                    id
                                )
                            }
                            IdentOrLiteral::Literal(_) => {
                                // This case should ideally not happen for named struct variants
                                panic!(
                                    "Enum variant names cannot be literals for struct variants in #[repr(Rust)]"
                                )
                            }
                        };
                        let fields_with_types: Vec<TokenStream> = fields
                            .iter()
                            .map(|pf| {
                                let field_name = match &pf.name.raw {
                                    IdentOrLiteral::Ident(id) => quote! { #id },
                                    IdentOrLiteral::Literal(_) => {
                                        panic!("Struct variant cannot have literal field names")
                                    }
                                };
                                let typ = &pf.ty;
                                quote! { #field_name: #typ }
                            })
                            .collect();
                        shadow_defs.push(quote! {
                            #[repr(C)] // Layout variants like C structs
                            #[allow(non_snake_case, dead_code)]
                            struct #shadow_struct_name #bgp_with_bounds #where_clauses_tokens {
                                _discriminant: #discriminant_rust_type,
                                _phantom: #phantom_data,
                                #(#fields_with_types),*
                            }
                        });
                        let field_defs: Vec<TokenStream> = fields
                            .iter()
                            .map(|pf| {
                                gen_field_from_pfield(
                                    pf,
                                    &shadow_struct_name,
                                    &facet_bgp,
                                    None,
                                    &facet_crate,
                                )
                            })
                            .collect();
                        exprs.push(quote! {{
                            let fields: &'static [#facet_crate::Field] = &const {[
                                #(#field_defs),*
                            ]};
                            #facet_crate::Variant::builder()
                                #variant_attrs_tokens
                                .discriminant(#discriminant_ts as i64)
                                .data(#facet_crate::StructType::builder().repr(#facet_crate::Repr::c()).struct_().fields(fields).build())
                                #maybe_doc
                                .build()
                        }});
                    }
                }
                // Rust-style enums increment discriminant unless explicitly set
                discriminant_offset += 1;
            }
            let repr_type_ts = enum_repr_ts_from_primitive(*prim);
            (shadow_defs, exprs, repr_type_ts)
        }
        PRepr::Transparent => {
            return quote! {
                compile_error!("#[repr(transparent)] is not supported on enums by Facet");
            };
        }
        PRepr::Rust(None) => {
            return quote! {
                compile_error!("Facet requires enums to have an explicit representation (e.g., #[repr(C)], #[repr(u8)])");
            };
        }
        PRepr::RustcWillCatch => {
            // rustc will emit an error for the invalid repr (e.g., conflicting hints).
            // Return empty TokenStream so we don't add misleading errors.
            return quote! {};
        }
    };

    // Only make static_decl for non-generic enums
    let static_decl = if parsed.generics.is_none() {
        generate_static_decl(enum_name, &facet_crate)
    } else {
        quote! {}
    };

    // Set up generics for impl blocks
    let facet_bgp = bgp.with_lifetime(LifetimeName(format_ident!("__facet")));
    let bgp_def = facet_bgp.display_with_bounds();
    let bgp_without_bounds = bgp.display_without_bounds();

    let (ty, fields) = if opaque {
        (
            quote! {
                .ty(#facet_crate::Type::User(#facet_crate::UserType::Opaque))
            },
            quote! {},
        )
    } else {
        (
            quote! {
                .ty(#facet_crate::Type::User(#facet_crate::UserType::Enum(#facet_crate::EnumType::builder()
                        // Use variant expressions that just reference the shadow structs
                        // which are now defined above
                        .variants(__facet_variants)
                        .repr(#repr)
                        .enum_repr(#enum_repr_type_tokenstream)
                        .build())
                ))
            },
            quote! {
                let __facet_variants: &'static [#facet_crate::Variant] = &const {[
                    #(#variant_expressions),*
                ]};
            },
        )
    };

    // Generate constructor expressions to suppress dead_code warnings on enum variants.
    // When variants are constructed via reflection (e.g., facet_args::from_std_args()),
    // the compiler doesn't see them being used and warns about dead code.
    // This ensures all variants are "constructed" from the compiler's perspective.
    // We use explicit type annotations to help inference with const generics and
    // unused type parameters.
    let variant_constructors: Vec<TokenStream> = pe
        .variants
        .iter()
        .map(|pv| {
            let variant_ident = match &pv.name.raw {
                IdentOrLiteral::Ident(id) => id.clone(),
                IdentOrLiteral::Literal(n) => format_ident!("_{}", n),
            };
            match &pv.kind {
                PVariantKind::Unit => quote! { let _: #enum_name #bgp_without_bounds = #enum_name::#variant_ident },
                PVariantKind::Tuple { fields } => {
                    let todos = fields.iter().map(|_| quote! { todo!() });
                    quote! { let _: #enum_name #bgp_without_bounds = #enum_name::#variant_ident(#(#todos),*) }
                }
                PVariantKind::Struct { fields } => {
                    let field_inits: Vec<TokenStream> = fields
                        .iter()
                        .map(|pf| {
                            let field_name = match &pf.name.raw {
                                IdentOrLiteral::Ident(id) => id.clone(),
                                IdentOrLiteral::Literal(n) => format_ident!("_{}", n),
                            };
                            quote! { #field_name: todo!() }
                        })
                        .collect();
                    quote! { let _: #enum_name #bgp_without_bounds = #enum_name::#variant_ident { #(#field_inits),* } }
                }
            }
        })
        .collect();

    // Generate the impl
    quote! {
        #static_decl

        // Suppress dead_code warnings for enum variants constructed via reflection.
        // See: https://github.com/facet-rs/facet/issues/996
        const _: () = {
            #[allow(dead_code, unreachable_code, clippy::multiple_bound_locations, clippy::diverging_sub_expression)]
            fn __facet_construct_all_variants #bgp_def () -> #enum_name #bgp_without_bounds #where_clauses_tokens {
                loop {
                    #(#variant_constructors;)*
                }
            }
        };

        #[automatically_derived]
        #[allow(non_camel_case_types)]
        unsafe impl #bgp_def #facet_crate::Facet<'__facet> for #enum_name #bgp_without_bounds #where_clauses_tokens {
            const SHAPE: &'static #facet_crate::Shape = &const {
                #(#shadow_struct_defs)*
                #fields
                #facet_crate::Shape::builder_for_sized::<Self>()
                    .vtable({
                        #facet_crate::value_vtable!(Self, #type_name_fn)
                    })
                    .type_identifier(#enum_name_str)
                    #type_params
                    #ty
                    #maybe_container_doc
                    #container_attributes_tokens
                    #type_tag_maybe
                    .build()
            };
        }
    }
}

facet-rs / facet / 19922182031

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