New: support gate modifiers

src/parser/gate.rs

@@ -44,3 +44,24 @@ pub fn parse_gate<'a>(input: ParserInput<'a>) -> ParserResult<'a, Instruction> {
         },
     ))
 }
+
+#[cfg(test)]
+mod test {
+    use super::parse_gate;
+    use crate::expression::Expression;
+    use crate::instruction::{GateModifier, Instruction, Qubit};
+    use crate::make_test;
+    use crate::parser::lexer::lex;
+
+    make_test!(
+        test_modifiers,
+        parse_gate,
+        "DAGGER CONTROLLED RX(pi) 0 1",
+        Instruction::Gate {
+            name: "RX".to_string(),
+            parameters: vec![Expression::PiConstant],
+            qubits: vec![Qubit::Fixed(0), Qubit::Fixed(1)],
+            modifiers: vec![GateModifier::Dagger, GateModifier::Controlled],
+        }
+    );
+}

src/parser/instruction.rs

@@ -105,7 +105,7 @@ pub fn parse_instruction(input: ParserInput) -> ParserResult<Instruction> {
             })
         }
         Some((Token::NonBlocking, _)) => command::parse_pulse(input),
-        Some((Token::Identifier(_), _)) => gate::parse_gate(input),
+        Some((Token::Identifier(_), _)) | Some((Token::Modifier(_), _)) => gate::parse_gate(input),
         Some((_, _)) => Err(nom::Err::Failure(Error {
             input: &input[..1],
             error: ErrorKind::NotACommandOrGate,