add EmptyTable constant

maybe it shouldn’t be there though...

src/ast.rs

@@ -53,6 +53,7 @@ pub enum Constant {
 	Boolean(bool),
 	Number(i64),
 	String(String),
+	EmptyTable,
 }
 
 impl Location {

src/run.rs

@@ -68,6 +68,7 @@ impl Eval for Constant {
 			Constant::Boolean(value) => Some(ValueInner::Boolean(*value)),
 			Constant::Number(value) => Some(ValueInner::Number(*value)),
 			Constant::String(value) => Some(ValueInner::String(value.clone())),
+			Constant::EmptyTable => Some(ValueInner::Table(Default::default())),
 		}
 	}
 }

src/twopass.rs

@@ -291,6 +291,7 @@ impl Eval for ast::Constant {
 			ast::Constant::Boolean(value) => Some(types::ValueInner::Boolean(*value)),
 			ast::Constant::Number(value) => Some(types::ValueInner::Number(*value)),
 			ast::Constant::String(value) => Some(types::ValueInner::String(value.clone())),
+			ast::Constant::EmptyTable => Some(types::ValueInner::Table(Default::default())),
 		}
 	}
 }