fn rename_for_config()

in src/bindgen/ir/union.rs [165:213]
43 lines of code
8 McCabe index (conditional complexity)

    fn rename_for_config(&mut self, config: &Config) {
        config.export.rename(&mut self.export_name);
        for field in &mut self.fields {
            field.ty.rename_for_config(config, &self.generic_params);
        }

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

        if let Some(o) = self.annotations.list("field-names") {
            let mut overriden_fields = Vec::new();

            for (i, field) in self.fields.iter().enumerate() {
                if i >= o.len() {
                    overriden_fields.push(field.clone());
                } else {
                    overriden_fields.push(Field {
                        name: o[i].clone(),
                        ty: field.ty.clone(),
                        cfg: field.cfg.clone(),
                        annotations: field.annotations.clone(),
                        documentation: field.documentation.clone(),
                    });
                }
            }

            self.fields = overriden_fields;
        } else if let Some(r) = rules.not_none() {
            self.fields = self
                .fields
                .iter()
                .map(|field| Field {
                    name: r
                        .apply(&field.name, IdentifierType::StructMember)
                        .into_owned(),
                    ty: field.ty.clone(),
                    cfg: field.cfg.clone(),
                    annotations: field.annotations.clone(),
                    documentation: field.documentation.clone(),
                })
                .collect();
        } else if self.tuple_union {
            // If we don't have any rules for a tuple union, prefix them with
            // an underscore so it still compiles
            for field in &mut self.fields {
                field.name.insert(0, '_');
            }
        }
    }