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use super::error::Result;
use syn::Field;

/// Creates an instance by parsing an individual field and its attributes.
pub trait FromField: Sized {
  fn from_field(field: &Field) -> Result<Self>;
}

impl FromField for () {
  fn from_field(_: &Field) -> Result<Self> {
    Ok(())
  }
}

impl FromField for Field {
  fn from_field(field: &Field) -> Result<Self> {
    Ok(field.clone())
  }
}

impl FromField for syn::Type {
  fn from_field(field: &Field) -> Result<Self> {
    Ok(field.ty.clone())
  }
}

impl FromField for syn::Visibility {
  fn from_field(field: &Field) -> Result<Self> {
    Ok(field.vis.clone())
  }
}

impl FromField for Vec<syn::Attribute> {
  fn from_field(field: &Field) -> Result<Self> {
    Ok(field.attrs.clone())
  }
}