modql-macros 0.5.0-alpha.8

Macros for modql. Not intended to be used directly.
Documentation 
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use crate::utils::{get_dinput_attribute, get_meta_value_string};
use syn::punctuated::Punctuated;
use syn::{DeriveInput, Meta, Token};

// region:    --- Struct Prop Attribute
pub struct StructModqlFieldProps {
	pub rel: Option<String>,
	pub names_as_consts: Option<String>,
}

pub fn get_struct_modql_props(dinput: &DeriveInput) -> Result<StructModqlFieldProps, syn::Error> {
	// FIXME: We should remove this, 'sqlb' should not be a thing anymore.
	let sqlb_attr = get_dinput_attribute(dinput, "modql");
	let mut rel = None;
	let mut names_as_consts = None;

	if let Some(attribute) = sqlb_attr {
		let nested = attribute.parse_args_with(Punctuated::<Meta, Token![,]>::parse_terminated)?;

		for meta in nested {
			match meta {
				// #[modql(rel=value)]
				Meta::NameValue(nv) =>
				{
					#[allow(clippy::if_same_then_else)]
					if nv.path.is_ident("rel") {
						rel = get_meta_value_string(nv);
					} else if nv.path.is_ident("names_as_consts") {
						names_as_consts = get_meta_value_string(nv);
					}
				}

				Meta::Path(path) => {
					if let Some(path) = path.get_ident() {
						let path = path.to_string();
						if path == "names_as_consts" {
							names_as_consts = Some("".to_string())
						}
					}
				}

				/* ... */
				_ => {
					let msg = "unrecognized modql attribute value";
					return Err(syn::Error::new_spanned(meta, msg));
					// return Err(syn::Error::new_spanned(meta, "unrecognized field"));
				}
			}
		}
	}

	Ok(StructModqlFieldProps { rel, names_as_consts })
}

// endregion: --- Struct Prop Attribute