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Diffstat (limited to '')
| -rw-r--r-- | askama_derive/src/lib.rs | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/askama_derive/src/lib.rs b/askama_derive/src/lib.rs index 752978e..f823299 100644 --- a/askama_derive/src/lib.rs +++ b/askama_derive/src/lib.rs @@ -19,9 +19,16 @@ struct TemplateMeta { // in the parsed struct or enum. Will panic if it does not find the required // template path, or if the `print` key has an unexpected value. fn get_template_meta(ast: &syn::DeriveInput) -> TemplateMeta { + let attr = ast.attrs.iter().find(|a| a.name() == "template"); + if attr.is_none() { + let msg = format!("'template' attribute not found on struct '{}'", + ast.ident.as_ref()); + panic!(msg); + } + + let attr = attr.unwrap(); let mut path = None; let mut print = "none".to_string(); - let attr = ast.attrs.iter().find(|a| a.name() == "template").unwrap(); if let syn::MetaItem::List(_, ref inner) = attr.value { for nm_item in inner { if let syn::NestedMetaItem::MetaItem(ref item) = *nm_item { |