Attribute grammar

parser/src/grammar.pest

@@ -19,7 +19,18 @@ var_decl =  { type_expr ~ mutable? ~ identifier }
 
 // ================= TOP LEVEL =================
 
-top_level = _{ import | function_decl | struct_decl }
+attribute_list = { sharp ~ "[" ~ attribute ~ ("," ~ attribute)* ~ "]" }
+
+attribute = { static_path ~ attribute_args? }
+
+attribute_args = { "(" ~ (attr_expr ~ ("," ~ attr_expr)*)? ~ ")" }
+
+attr_expr = {
+    (identifier ~ "=" ~ primary)
+  | primary
+}
+
+top_level = _{ attribute_list* ~ (import | function_decl | struct_decl) }
 
 import = { sharp ~ "include" ~ "<" ~ static_path ~ ">" }