Add newline param to print oracle

noir_stdlib/src/lib.nr

@@ -24,15 +24,14 @@ mod test;
 // Thus, the only argument to the `print` oracle is expected to always be an ident
 
 #[oracle(print)]
-unconstrained fn print_oracle<T>(_input: T) {}
+unconstrained fn print_oracle<T>(_input: T, _newline: bool) {}
 
 unconstrained pub fn print<T>(input: T) {
-    print_oracle(input);
+    print_oracle(input, false);
 }
 
 unconstrained pub fn println<T>(input: T) {
-    print(f"{input}
-"); // skip a 2nd oracle call; use multi-line format to insert a newline
+    print_oracle(input, true);
 }
 
 #[foreign(recursive_aggregation)]

tooling/nargo/src/ops/foreign_calls.rs

@@ -129,7 +129,13 @@ impl DefaultForeignCallExecutor {
 
     fn execute_print(foreign_call_inputs: &[ForeignCallParam]) -> Result<(), ForeignCallError> {
         let display_values: PrintableValueDisplay = foreign_call_inputs.try_into()?;
-        print!("{display_values}");
+
+        if foreign_call_inputs[1].unwrap_value().is_zero() {
+            print!("{display_values}");
+        } else {
+            println!("{display_values}");
+        }
+
         Ok(())
     }
 }