first attempt at parsing multiple rows

joinrs_proc/src/lib.rs

@@ -102,18 +102,37 @@ fn generate_parse_object(
 fn generate_parse_vec(inner_type: Box<TypeMapping>) -> proc_macro2::TokenStream {
     let value_expression = generate_parse_expression(&*inner_type);
 
+    let extract_comparitor = match *inner_type {
+        TypeMapping::Vec(_) => panic!("Ambiguous data structure: Cannot parse vec of vec"),
+        TypeMapping::Column(_) => quote! { &current_row_value },
+        // TODO: Parse ID column from the return type declaration
+        TypeMapping::Object { struct_name: _, properties: _ } => quote! { &current_row_value.uuid },
+    };
+
     quote! {
         {
             let mut parse_closure = || -> joinrs::anyhow::Result<_> {
                 let mut vec = Vec::new();
-                let parse_result = #value_expression;
+                let mut previous_comparison = None;
+
+                while let Some(_next) = rows.peek() {
+                    let current_row_value = #value_expression?;
+
+                    let current_row_comparison = #extract_comparitor;
 
-                if let Ok(value) = parse_result {
-                    vec.push(value);
+                    vec.push(current_row_value);
+
+                    if previous_comparison.is_some() && *previous_comparison.unwrap() != *current_row_comparison {
+                        break
+                    }
+
+                    rows.next();
+                    previous_comparison = Some(current_row_comparison.clone());
                 }
 
                 Ok(vec)
             };
+
             parse_closure()
         }
     }