bevy/crates/bevy_macro_utils/src/attrs.rs
Zachary Harrold e5dbde86fb
Moved fq_std from bevy_reflect_derive to bevy_macro_utils (#9956)
# Objective

- Fixes #9363

## Solution

Moved `fq_std` from `bevy_reflect_derive` to `bevy_macro_utils`. This
does make the `FQ*` types public where they were previously private,
which is a change to the public-facing API, but I don't believe a
breaking one. Additionally, I've done a basic QA pass over the
`bevy_macro_utils` crate, adding `deny(unsafe)`, `warn(missing_docs)`,
and documentation where required.
2023-10-02 00:22:57 +00:00

34 lines
1,009 B
Rust

use syn::{Expr, ExprLit, Lit};
use crate::symbol::Symbol;
/// Get a [literal string](struct@syn::LitStr) from the provided [expression](Expr).
pub fn get_lit_str(attr_name: Symbol, value: &Expr) -> syn::Result<&syn::LitStr> {
if let Expr::Lit(ExprLit {
lit: Lit::Str(lit), ..
}) = &value
{
Ok(lit)
} else {
Err(syn::Error::new_spanned(
value,
format!("expected {attr_name} attribute to be a string: `{attr_name} = \"...\"`"),
))
}
}
/// Get a [literal boolean](struct@syn::LitBool) from the provided [expression](Expr) as a [`bool`].
pub fn get_lit_bool(attr_name: Symbol, value: &Expr) -> syn::Result<bool> {
if let Expr::Lit(ExprLit {
lit: Lit::Bool(lit),
..
}) = &value
{
Ok(lit.value())
} else {
Err(syn::Error::new_spanned(
value,
format!("expected {attr_name} attribute to be a bool value, `true` or `false`: `{attr_name} = ...`"),
))?
}
}