1 files changed, 108 insertions, 0 deletions
diff --git a/src/parameter.rs b/src/parameter.rs
index 01a7f40..8df7625 100644
--- a/src/parameter.rs
+++ b/src/parameter.rs
@@ -114,7 +114,115 @@ impl Parameter {
 	}
 }
 
+pub trait FromToParameter: Sized {
+	fn from_parameter(p: Parameter) -> Option<Self>;
+	fn to_parameter(self) -> Parameter;
+}
+
+
+
+impl FromToParameter for Parameter {
+	fn from_parameter(p: Parameter) -> Option<Self>{
+		Some(p)
+	}
+	fn to_parameter(self) -> Parameter {
+		self
+	}
+}
+
+macro_rules! tofrom {
+	($paramtyp: ident $typ: ty) => {
+		impl FromToParameter for $typ {
+			fn from_parameter(p: Parameter) -> Option<Self>{
+				if let Parameter::$paramtyp(i) = p {
+					Some(i)
+				} else {
+					None
+				}
+			}
+			fn to_parameter(self) -> Parameter {
+				Parameter::$paramtyp(self)
+			}
+		}
+	}
+}
+
+tofrom!(Int i64);
+tofrom!(Float f64);
+tofrom!(Bool bool);
+tofrom!(String String);
+tofrom!(Pos Pos);
+tofrom!(Template Template);
+tofrom!(Interaction Interactable);
+
+
+impl<T> FromToParameter for Vec<T>
+where
+	T: FromToParameter,
+{
+	fn from_parameter(p: Parameter) -> Option<Self>{
+		if let Parameter::List(items) = p{
+			let mut v = Self::new();
+			for item in items {
+				if let Some(t) = T::from_parameter(item){
+					v.push(t);
+				} else {
+					return None;
+				}
+			}
+			Some(v)
+		} else {
+			None
+		}
+	}
+	fn to_parameter(self) -> Parameter {
+		Parameter::List(self.into_iter().map(|item| item.to_parameter()).collect())
+	}
+}
 
+impl<T, U> FromToParameter for (T, U)
+where
+	T: FromToParameter,
+	U: FromToParameter,
+{
+	fn from_parameter(p: Parameter) -> Option<Self> {
+		if let Parameter::List(mut items) = p {
+			if items.len() == 2 {
+				return Some((
+					T::from_parameter(items.remove(0))?,
+					U::from_parameter(items.remove(0))?
+				))
+			}
+		}
+		None
+	}
+	fn to_parameter(self) -> Parameter {
+		Parameter::List(vec![self.0.to_parameter(), self.1.to_parameter()])
+	}
+}
+
+impl<T, U, V> FromToParameter for (T, U, V)
+where
+	T: FromToParameter,
+	U: FromToParameter,
+	V: FromToParameter,
+{
+	fn from_parameter(p: Parameter) -> Option<Self> {
+		if let Parameter::List(mut items) = p {
+			if items.len() == 3 {
+				return Some((
+					T::from_parameter(items.remove(0))?,
+					U::from_parameter(items.remove(0))?,
+					V::from_parameter(items.remove(0))?
+				))
+			}
+		}
+		None
+	}
+	fn to_parameter(self) -> Parameter {
+		Parameter::List(vec![self.0.to_parameter(), self.1.to_parameter(), self.2.to_parameter()])
+	}
+}
 
 #[cfg(test)]
 mod tests {