Implement the not operator

src/ast/parser.rs

@@ -144,7 +144,7 @@ impl<'a, T: Iterator<Item = token::Token<'a>>> Parser<'a, T> {
 	fn primary(&mut self) -> Result<ASTNode> {
 		let node = match self.token_iter.next().map(|it| it.token_type) {
 			Some(TokenType::False) => ASTNode::Literal(astnode::Literal::Bool(false)),
-			Some(TokenType::True) => ASTNode::Literal(astnode::Literal::Bool(false)),
+			Some(TokenType::True) => ASTNode::Literal(astnode::Literal::Bool(true)),
 			Some(TokenType::Int(i)) => ASTNode::Literal(astnode::Literal::Int(i)),
 			Some(TokenType::String(i)) => ASTNode::Literal(astnode::Literal::String(i)),
 			Some(TokenType::Float(f)) => ASTNode::Literal(astnode::Literal::Float(f)),

src/interpreter/ast_walker.rs

@@ -47,9 +47,9 @@ impl Interpret for astnode::BinaryExpr {
 
 impl Interpret for astnode::UnaryExpr {
 	fn interpret(&self) -> Result<types::Value, RuntimeError> {
-		let _val = self.right.interpret();
+		let val = self.right.interpret()?;
 		match self.operator {
-			UnaryOperator::Bang => todo!(),
+			UnaryOperator::Bang => Ok(types::Value::Bool(!val.truthy())),
 			UnaryOperator::Minus => todo!(),
 		}
 	}

src/interpreter/types.rs

@@ -2,48 +2,31 @@ use crate::ast::astnode;
 use from_variants::FromVariants;
 
 #[derive(Debug, PartialEq, PartialOrd, FromVariants)]
-pub enum Primitive {
+pub enum Value {
 	Int(i32),
 	Float(f32),
 	Bool(bool),
 	Null,
-}
-
-#[derive(Debug, PartialEq, PartialOrd, FromVariants)]
-pub enum Value {
-	#[from_variants(into)]
-	Primitive(Primitive),
+	// TODO: create a cow(not rust cow) string instead of cloning a normal string
+	String(String),
 }
 
 impl From<astnode::Literal> for Value {
 	fn from(l: astnode::Literal) -> Self {
 		match_any::match_any!(l,
-			astnode::Literal::Int(v) | astnode::Literal::Bool(v)| astnode::Literal::Float(v) => v.into(),
-			astnode::Literal::String(_s) => todo!()
+			astnode::Literal::Int(v) | astnode::Literal::Bool(v) | astnode::Literal::Float(v) | astnode::Literal::String(v) => v.into()
 		)
 	}
 }
 
-impl Value {
-	pub fn int(i: i32) -> Value {
-		Value::Primitive(Primitive::Int(i))
-	}
-
-	pub fn float(f: f32) -> Value {
-		Value::Primitive(Primitive::Float(f))
-	}
-
-	pub fn bool(b: bool) -> Value {
-		Value::Primitive(Primitive::Bool(b))
-	}
-
-	pub fn null() -> Value {
-		Value::Primitive(Primitive::Null)
-	}
-}
-
 impl Default for Value {
 	fn default() -> Self {
-		Self::null()
+		Self::Null
+	}
+}
+
+impl Value {
+	pub fn truthy(&self) -> bool {
+		!(matches!(*self, Self::Bool(false)))
 	}
 }

tests/integration_test.rs

@@ -1,4 +1,3 @@
-use crftng_intrprtrs::interpreter::types;
 use crftng_intrprtrs::run;
 
 #[test]
@@ -12,5 +11,5 @@ fn test_one_equality() {
 }
 
 fn run_check_result_eq_bool(code: &str, value: bool) {
-	assert_eq!(run(code).unwrap(), types::Value::bool(value))
+	assert_eq!(run(code).unwrap(), value.into())
 }