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Add comment explaining why we double-parse an Expr

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This commit is contained in:
Graham Esau 2024-04-28 18:59:42 +01:00
parent bbedf130ce
commit df00e2fd71
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schemars_derive/src/attr/validation.rs
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@ -510,6 +510,7 @@ fn wrap_string_validation(v: Vec<TokenStream>) -> Option<TokenStream> {
} }
fn str_or_num_to_expr(cx: &Ctxt, meta_item_name: &str, expr: Expr) -> Option<Expr> { fn str_or_num_to_expr(cx: &Ctxt, meta_item_name: &str, expr: Expr) -> Option<Expr> {
// this odd double-parsing is to make `-10` parsed as an Lit instead of an Expr::Unary
let lit: Lit = match syn::parse2(expr.to_token_stream()) { let lit: Lit = match syn::parse2(expr.to_token_stream()) {
Ok(l) => l, Ok(l) => l,
Err(err) => { Err(err) => {