fn rename_for_config()

in src/bindgen/ir/enumeration.rs [504:598]
88 lines of code
14 McCabe index (conditional complexity)

    fn rename_for_config(&mut self, config: &Config) {
        config.export.rename(&mut self.export_name);

        if config.language != Language::Cxx && self.tag.is_some() {
            // it makes sense to always prefix Tag with type name in C
            let new_tag = format!("{}_Tag", self.export_name);
            if self.repr.style == ReprStyle::Rust {
                for variant in &mut self.variants {
                    if let VariantBody::Body { ref mut body, .. } = variant.body {
                        let path = Path::new(new_tag.clone());
                        let generic_path = GenericPath::new(path, vec![]);
                        body.fields[0].ty = Type::Path(generic_path);
                    }
                }
            }
            self.tag = Some(new_tag);
        }

        for variant in &mut self.variants {
            reserved::escape(&mut variant.export_name);
            if let Some(discriminant) = &mut variant.discriminant {
                discriminant.rename_for_config(config);
            }
            if let VariantBody::Body {
                ref mut name,
                ref mut body,
                ..
            } = variant.body
            {
                body.rename_for_config(config);
                reserved::escape(name);
            }
        }

        if self
            .annotations
            .bool("prefix-with-name")
            .unwrap_or(config.enumeration.prefix_with_name)
        {
            let separator = if config.export.mangle.remove_underscores {
                ""
            } else {
                "_"
            };

            for variant in &mut self.variants {
                variant.export_name =
                    format!("{}{}{}", self.export_name, separator, variant.export_name);
                if let VariantBody::Body { ref mut body, .. } = variant.body {
                    body.export_name =
                        format!("{}{}{}", self.export_name, separator, body.export_name());
                }
            }
        }

        let rules = self.annotations.parse_atom::<RenameRule>("rename-all");
        let rules = rules
            .as_ref()
            .unwrap_or(&config.enumeration.rename_variants);

        if let Some(r) = rules.not_none() {
            self.variants = self
                .variants
                .iter()
                .map(|variant| {
                    EnumVariant::new(
                        r.apply(
                            &variant.export_name,
                            IdentifierType::EnumVariant {
                                prefix: &self.export_name,
                            },
                        )
                        .into_owned(),
                        variant.discriminant.clone(),
                        match variant.body {
                            VariantBody::Empty(..) => variant.body.clone(),
                            VariantBody::Body {
                                ref name,
                                ref body,
                                inline,
                                inline_casts,
                            } => VariantBody::Body {
                                name: r.apply(name, IdentifierType::StructMember).into_owned(),
                                body: body.clone(),
                                inline,
                                inline_casts,
                            },
                        },
                        variant.cfg.clone(),
                        variant.documentation.clone(),
                    )
                })
                .collect();
        }
    }