Extract expression node and expression parser to a separate file

src/ast/astnode.rs

@@ -1,196 +0,0 @@
-use crate::lexer::token;
-use from_variants::FromVariants;
-use match_any::match_any;
-use std::fmt::{Debug, Display};
-
-#[derive(FromVariants)]
-pub enum ASTNode {
-	BinaryExpr(BinaryExpr),
-	GroupingExpr(GroupingExpr),
-	Literal(Literal),
-	UnaryExpr(UnaryExpr),
-}
-
-macro_rules! all_variants {
-	($expr:expr, $val_name:ident => $expr_arm:expr) => {
-		{
-		use match_any::match_any;
-		use $crate::ast::astnode::*;
-		match_any!($expr, ASTNode::BinaryExpr($val_name) | ASTNode::GroupingExpr($val_name) | ASTNode::Literal($val_name) | ASTNode::UnaryExpr($val_name) => $expr_arm)
-		}
-
-	};
-}
-pub(crate) use all_variants;
-
-impl Debug for ASTNode {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		all_variants!(self, n => n.fmt(f))
-	}
-}
-
-pub enum UnaryOperator {
-	Minus,
-	Bang,
-}
-
-impl TryFrom<token::TokenType> for UnaryOperator {
-	type Error = EnumConvertError;
-
-	fn try_from(value: token::TokenType) -> Result<Self, Self::Error> {
-		Ok(match value {
-			token::TokenType::Bang => Self::Bang,
-			token::TokenType::Minus => Self::Minus,
-			_ => return Err(EnumConvertError),
-		})
-	}
-}
-
-impl Display for UnaryOperator {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		write!(
-			f,
-			"{}",
-			match *self {
-				UnaryOperator::Minus => "-",
-				UnaryOperator::Bang => "!",
-			}
-		)
-	}
-}
-
-pub enum Operator {
-	BangEqual,
-	Equal,
-	EqualEqual,
-	Greater,
-	GreaterEqual,
-	Less,
-	LessEqual,
-}
-
-#[derive(Debug)]
-pub struct EnumConvertError;
-impl std::fmt::Display for EnumConvertError {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		write!(f, "Couldn't convert between enums")
-	}
-}
-
-impl std::error::Error for EnumConvertError {}
-
-impl TryFrom<token::TokenType> for Operator {
-	type Error = EnumConvertError;
-
-	fn try_from(value: token::TokenType) -> Result<Self, Self::Error> {
-		Ok(match value {
-			token::TokenType::BangEqual => Self::BangEqual,
-			token::TokenType::Equal => Self::Equal,
-			token::TokenType::EqualEqual => Self::EqualEqual,
-			token::TokenType::Greater => Self::Greater,
-			token::TokenType::GreaterEqual => Self::GreaterEqual,
-			token::TokenType::Less => Self::Less,
-			token::TokenType::LessEqual => Self::LessEqual,
-
-			_ => return Err(EnumConvertError),
-		})
-	}
-}
-
-impl Display for Operator {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		write!(
-			f,
-			"{}",
-			match *self {
-				Operator::Less => "<",
-				Operator::Equal => "=",
-				Operator::Greater => ">",
-				Operator::BangEqual => "!=",
-				Operator::LessEqual => "<=",
-				Operator::EqualEqual => "==",
-				Operator::GreaterEqual => ">=",
-			}
-		)
-	}
-}
-
-#[derive(Debug, Clone)]
-pub enum Literal {
-	String(String),
-	Int(i32),
-	Float(f32),
-	Bool(bool),
-}
-
-pub struct BinaryExpr {
-	pub left: Box<ASTNode>,
-	pub operator: Operator,
-	pub right: Box<ASTNode>,
-}
-
-impl BinaryExpr {
-	pub fn new(left: Box<ASTNode>, operator: Operator, right: Box<ASTNode>) -> Self {
-		Self {
-			left,
-			operator,
-			right,
-		}
-	}
-}
-
-pub struct GroupingExpr(pub Box<ASTNode>);
-
-impl GroupingExpr {
-	pub(crate) fn new(expr: Box<ASTNode>) -> Self {
-		Self(expr)
-	}
-}
-
-pub struct UnaryExpr {
-	pub operator: UnaryOperator,
-	pub right: Box<ASTNode>,
-}
-
-impl UnaryExpr {
-	pub fn new(operator: UnaryOperator, right: Box<ASTNode>) -> Self {
-		Self { operator, right }
-	}
-}
-
-impl Debug for BinaryExpr {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		write!(f, "({} {:?} {:?})", self.operator, self.left, self.right)
-	}
-}
-
-impl Debug for GroupingExpr {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		write!(f, "({:?})", self.0)
-	}
-}
-
-impl Debug for UnaryExpr {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		write!(f, "({} {:?})", self.operator, self.right)
-	}
-}
-
-#[cfg(test)]
-mod tests {
-	use super::*;
-
-	#[test]
-	fn ast_printer() {
-		let ast = ASTNode::BinaryExpr(BinaryExpr {
-			left: Box::new(ASTNode::UnaryExpr(UnaryExpr {
-				operator: UnaryOperator::Bang,
-				right: Box::new(ASTNode::Literal(Literal::Int(1))),
-			})),
-			operator: Operator::EqualEqual,
-			right: Box::new(ASTNode::Literal(Literal::Int(0))),
-		});
-		let formated = format!("{:?}", ast);
-		assert_eq!("(== (! Int(1)) Int(0))", formated);
-	}
-}

src/ast/expression/expression_node.rs

@@ -0,0 +1,195 @@
+use crate::lexer::token;
+use from_variants::FromVariants;
+use match_any::match_any;
+use std::fmt::{Debug, Display};
+
+#[derive(FromVariants)]
+pub enum ExpressionNode {
+	BinaryExpr(BinaryExpr),
+	GroupingExpr(GroupingExpr),
+	Literal(Literal),
+	UnaryExpr(UnaryExpr),
+}
+
+macro_rules! all_variants {
+	($expr:expr, $val_name:ident => $expr_arm:expr) => {
+		{
+		use match_any::match_any;
+		use $crate::ast::expression::expression_node::*;
+		match_any!($expr, ExpressionNode::BinaryExpr($val_name) | ExpressionNode::GroupingExpr($val_name) | ExpressionNode::Literal($val_name) | ExpressionNode::UnaryExpr($val_name) => $expr_arm)
+		}
+	};
+}
+pub(crate) use all_variants;
+
+impl Debug for ExpressionNode {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		all_variants!(self, n => n.fmt(f))
+	}
+}
+
+pub enum UnaryOperator {
+	Minus,
+	Bang,
+}
+
+impl TryFrom<token::TokenType> for UnaryOperator {
+	type Error = EnumConvertError;
+
+	fn try_from(value: token::TokenType) -> Result<Self, Self::Error> {
+		Ok(match value {
+			token::TokenType::Bang => Self::Bang,
+			token::TokenType::Minus => Self::Minus,
+			_ => return Err(EnumConvertError),
+		})
+	}
+}
+
+impl Display for UnaryOperator {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(
+			f,
+			"{}",
+			match *self {
+				UnaryOperator::Minus => "-",
+				UnaryOperator::Bang => "!",
+			}
+		)
+	}
+}
+
+pub enum Operator {
+	BangEqual,
+	Equal,
+	EqualEqual,
+	Greater,
+	GreaterEqual,
+	Less,
+	LessEqual,
+}
+
+#[derive(Debug)]
+pub struct EnumConvertError;
+impl std::fmt::Display for EnumConvertError {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(f, "Couldn't convert between enums")
+	}
+}
+
+impl std::error::Error for EnumConvertError {}
+
+impl TryFrom<token::TokenType> for Operator {
+	type Error = EnumConvertError;
+
+	fn try_from(value: token::TokenType) -> Result<Self, Self::Error> {
+		Ok(match value {
+			token::TokenType::BangEqual => Self::BangEqual,
+			token::TokenType::Equal => Self::Equal,
+			token::TokenType::EqualEqual => Self::EqualEqual,
+			token::TokenType::Greater => Self::Greater,
+			token::TokenType::GreaterEqual => Self::GreaterEqual,
+			token::TokenType::Less => Self::Less,
+			token::TokenType::LessEqual => Self::LessEqual,
+
+			_ => return Err(EnumConvertError),
+		})
+	}
+}
+
+impl Display for Operator {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(
+			f,
+			"{}",
+			match *self {
+				Operator::Less => "<",
+				Operator::Equal => "=",
+				Operator::Greater => ">",
+				Operator::BangEqual => "!=",
+				Operator::LessEqual => "<=",
+				Operator::EqualEqual => "==",
+				Operator::GreaterEqual => ">=",
+			}
+		)
+	}
+}
+
+#[derive(Debug, Clone)]
+pub enum Literal {
+	String(String),
+	Int(i32),
+	Float(f32),
+	Bool(bool),
+}
+
+pub struct BinaryExpr {
+	pub left: Box<ExpressionNode>,
+	pub operator: Operator,
+	pub right: Box<ExpressionNode>,
+}
+
+impl BinaryExpr {
+	pub fn new(left: Box<ExpressionNode>, operator: Operator, right: Box<ExpressionNode>) -> Self {
+		Self {
+			left,
+			operator,
+			right,
+		}
+	}
+}
+
+pub struct GroupingExpr(pub Box<ExpressionNode>);
+
+impl GroupingExpr {
+	pub(crate) fn new(expr: Box<ExpressionNode>) -> Self {
+		Self(expr)
+	}
+}
+
+pub struct UnaryExpr {
+	pub operator: UnaryOperator,
+	pub right: Box<ExpressionNode>,
+}
+
+impl UnaryExpr {
+	pub fn new(operator: UnaryOperator, right: Box<ExpressionNode>) -> Self {
+		Self { operator, right }
+	}
+}
+
+impl Debug for BinaryExpr {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(f, "({} {:?} {:?})", self.operator, self.left, self.right)
+	}
+}
+
+impl Debug for GroupingExpr {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(f, "({:?})", self.0)
+	}
+}
+
+impl Debug for UnaryExpr {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		write!(f, "({} {:?})", self.operator, self.right)
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+
+	#[test]
+	fn expression_node_ast_printer() {
+		let ast = ExpressionNode::BinaryExpr(BinaryExpr {
+			left: Box::new(ExpressionNode::UnaryExpr(UnaryExpr {
+				operator: UnaryOperator::Bang,
+				right: Box::new(ExpressionNode::Literal(Literal::Int(1))),
+			})),
+			operator: Operator::EqualEqual,
+			right: Box::new(ExpressionNode::Literal(Literal::Int(0))),
+		});
+		let formated = format!("{:?}", ast);
+		assert_eq!("(== (! Int(1)) Int(0))", formated);
+	}
+}

src/ast/expression/expression_parser.rs

@@ -0,0 +1,124 @@
+use crate::lexer::token::{self, TokenType};
+
+use super::super::parser::{InnerASTParsingError, Parser, Result};
+use super::expression_node::*;
+
+impl<'a, T: Iterator<Item = token::Token<'a>>> Parser<'a, T> {
+	pub fn expression(&mut self) -> Result<ExpressionNode> {
+		self.equality()
+	}
+
+	fn equality(&mut self) -> Result<ExpressionNode> {
+		let mut node = self.comparison()?;
+		while let Some(o) = self
+			.token_iter
+			.next_if(|t| matches!(t.token_type, TokenType::EqualEqual | TokenType::BangEqual))
+		{
+			node = BinaryExpr::new(
+				Box::new(node),
+				o.token_type.try_into().unwrap(),
+				Box::new(self.comparison()?),
+			)
+			.into();
+		}
+		Ok(node)
+	}
+
+	fn comparison(&mut self) -> Result<ExpressionNode> {
+		let mut node = self.term()?;
+
+		while let Some(o) = self.token_iter.next_if(|t| {
+			matches!(
+				t.token_type,
+				TokenType::Greater
+					| TokenType::GreaterEqual
+					| TokenType::Less | TokenType::LessEqual
+			)
+		}) {
+			node = BinaryExpr::new(
+				Box::new(node),
+				o.token_type.try_into().unwrap(),
+				Box::new(self.comparison()?),
+			)
+			.into();
+		}
+		Ok(node)
+	}
+
+	fn term(&mut self) -> Result<ExpressionNode> {
+		let mut node = self.factor()?;
+
+		while let Some(o) = self
+			.token_iter
+			.next_if(|t| matches!(t.token_type, TokenType::Minus | TokenType::Plus))
+		{
+			node = BinaryExpr::new(
+				Box::new(node),
+				o.token_type.try_into().unwrap(),
+				Box::new(self.comparison()?),
+			)
+			.into()
+		}
+		Ok(node)
+	}
+
+	fn factor(&mut self) -> Result<ExpressionNode> {
+		let mut node = self.unary()?;
+
+		while let Some(o) = self
+			.token_iter
+			.next_if(|t| matches!(t.token_type, TokenType::Star | TokenType::Slash))
+		{
+			node = BinaryExpr::new(
+				Box::new(node),
+				o.token_type.try_into().unwrap(),
+				Box::new(self.comparison()?),
+			)
+			.into();
+		}
+		Ok(node)
+	}
+
+	fn unary(&mut self) -> Result<ExpressionNode> {
+		if let Some(op) = self
+			.token_iter
+			.next_if(|t| matches!(t.token_type, TokenType::Bang | TokenType::Minus))
+		{
+			let right = Box::new(self.unary()?);
+			Ok(ExpressionNode::UnaryExpr(UnaryExpr::new(
+				op.token_type.try_into().unwrap(),
+				right,
+			)))
+		} else {
+			self.primary()
+		}
+	}
+
+	fn primary(&mut self) -> Result<ExpressionNode> {
+		let node = match self.token_iter.next() {
+			Some(token) => match token.token_type {
+				TokenType::False => ExpressionNode::Literal(Literal::Bool(false)),
+				TokenType::True => ExpressionNode::Literal(Literal::Bool(true)),
+				TokenType::Int(i) => ExpressionNode::Literal(Literal::Int(i)),
+				TokenType::String(i) => ExpressionNode::Literal(Literal::String(i)),
+				TokenType::Float(f) => ExpressionNode::Literal(Literal::Float(f)),
+				TokenType::LeftParen => {
+					let expr = self.expression()?;
+					let group = GroupingExpr::new(Box::new(expr));
+					match self
+						.token_iter
+						.next_if(|v| matches!(v.token_type, TokenType::RightParen))
+					{
+						Some(_) => return Ok(group.into()),
+						None => {
+							return Err(token.location.wrap(InnerASTParsingError::UnmatchedBrace))
+						}
+					}
+				}
+				a => return Err(token.location.wrap(InnerASTParsingError::IncorrectToken(a))),
+			},
+			None => todo!(),
+		};
+		Ok(node)
+	}
+}

src/ast/expression/mod.rs

@@ -0,0 +1,2 @@
+pub mod expression_node;
+mod expression_parser;

src/ast/mod.rs

@@ -1,2 +1,2 @@
-pub mod astnode;
+pub mod expression;
 pub mod parser;

src/ast/parser.rs

@@ -1,5 +1,4 @@
-use super::astnode;
-use super::astnode::{ASTNode, BinaryExpr};
+use super::expression::expression_node;
 use crate::error::ErrorLocationWrapper;
 use crate::lexer::{token, token::TokenType};
 
@@ -23,10 +22,10 @@ impl std::fmt::Display for InnerASTParsingError {
 impl std::error::Error for InnerASTParsingError {}
 
 pub type ASTParsingError = ErrorLocationWrapper<InnerASTParsingError>;
-type Result<T> = StdResult<T, ASTParsingError>;
+pub(super) type Result<T> = StdResult<T, ASTParsingError>;
 
 pub struct Parser<'a, T: Iterator<Item = token::Token<'a>>> {
-	token_iter: iter::Peekable<T>,
+	pub(super) token_iter: iter::Peekable<T>,
 }
 
 impl<'a, T: Iterator<Item = token::Token<'a>>> Parser<'a, T> {
@@ -35,7 +34,9 @@ impl<'a, T: Iterator<Item = token::Token<'a>>> Parser<'a, T> {
 			token_iter: iter.peekable(),
 		}
 	}
-	pub fn scan_expressions(&mut self) -> StdResult<Vec<ASTNode>, Vec<ASTParsingError>> {
+	pub fn parse_all(
+		&mut self,
+	) -> StdResult<Vec<expression_node::ExpressionNode>, Vec<ASTParsingError>> {
 		let mut tokens = Vec::new();
 		let mut errors = Vec::new();
 
@@ -55,122 +56,4 @@ impl<'a, T: Iterator<Item = token::Token<'a>>> Parser<'a, T> {
 			Err(errors)
 		}
 	}
-
-	fn expression(&mut self) -> Result<ASTNode> {
-		self.equality()
-	}
-
-	fn equality(&mut self) -> Result<ASTNode> {
-		let mut node = self.comparison()?;
-		while let Some(o) = self
-			.token_iter
-			.next_if(|t| matches!(t.token_type, TokenType::EqualEqual | TokenType::BangEqual))
-		{
-			node = BinaryExpr::new(
-				Box::new(node),
-				o.token_type.try_into().unwrap(),
-				Box::new(self.comparison()?),
-			)
-			.into();
-		}
-		Ok(node)
-	}
-
-	fn comparison(&mut self) -> Result<ASTNode> {
-		let mut node = self.term()?;
-
-		while let Some(o) = self.token_iter.next_if(|t| {
-			matches!(
-				t.token_type,
-				TokenType::Greater
-					| TokenType::GreaterEqual
-					| TokenType::Less | TokenType::LessEqual
-			)
-		}) {
-			node = BinaryExpr::new(
-				Box::new(node),
-				o.token_type.try_into().unwrap(),
-				Box::new(self.comparison()?),
-			)
-			.into();
-		}
-		Ok(node)
-	}
-
-	fn term(&mut self) -> Result<ASTNode> {
-		let mut node = self.factor()?;
-
-		while let Some(o) = self
-			.token_iter
-			.next_if(|t| matches!(t.token_type, TokenType::Minus | TokenType::Plus))
-		{
-			node = BinaryExpr::new(
-				Box::new(node),
-				o.token_type.try_into().unwrap(),
-				Box::new(self.comparison()?),
-			)
-			.into()
-		}
-		Ok(node)
-	}
-
-	fn factor(&mut self) -> Result<ASTNode> {
-		let mut node = self.unary()?;
-
-		while let Some(o) = self
-			.token_iter
-			.next_if(|t| matches!(t.token_type, TokenType::Star | TokenType::Slash))
-		{
-			node = BinaryExpr::new(
-				Box::new(node),
-				o.token_type.try_into().unwrap(),
-				Box::new(self.comparison()?),
-			)
-			.into();
-		}
-		Ok(node)
-	}
-
-	fn unary(&mut self) -> Result<ASTNode> {
-		if let Some(op) = self
-			.token_iter
-			.next_if(|t| matches!(t.token_type, TokenType::Bang | TokenType::Minus))
-		{
-			let right = Box::new(self.unary()?);
-			Ok(ASTNode::UnaryExpr(astnode::UnaryExpr::new(
-				op.token_type.try_into().unwrap(),
-				right,
-			)))
-		} else {
-			self.primary()
-		}
-	}
-
-	fn primary(&mut self) -> Result<ASTNode> {
-		let node = match self.token_iter.next() {
-			Some(token) => match token.token_type {
-				TokenType::False => ASTNode::Literal(astnode::Literal::Bool(false)),
-				TokenType::True => ASTNode::Literal(astnode::Literal::Bool(true)),
-				TokenType::Int(i) => ASTNode::Literal(astnode::Literal::Int(i)),
-				TokenType::String(i) => ASTNode::Literal(astnode::Literal::String(i)),
-				TokenType::Float(f) => ASTNode::Literal(astnode::Literal::Float(f)),
-				TokenType::LeftParen => {
-					let expr = self.expression()?;
-					let group = astnode::GroupingExpr::new(Box::new(expr));
-					match self
-						.token_iter
-						.next_if(|v| matches!(v.token_type, TokenType::RightParen))
-					{
-						Some(_) => return Ok(group.into()),
-						None => {
-							return Err(token.location.wrap(InnerASTParsingError::UnmatchedBrace))
-						}
-					}
-				}
-				a => return Err(token.location.wrap(InnerASTParsingError::IncorrectToken(a))),
-			},
-			None => todo!(),
-		};
-		Ok(node)
-	}
 }

src/interpreter/ast_walker.rs

@@ -1,7 +1,7 @@
 use std::fmt::Display;
 
 use super::types::Value;
-use crate::ast::astnode::{self, UnaryOperator};
+use crate::ast::expression::expression_node;
 
 #[derive(Debug)]
 pub struct RuntimeError;
@@ -17,40 +17,40 @@ pub trait Interpret {
 	fn interpret(&self) -> Result<Value, RuntimeError>;
 }
 
-impl Interpret for astnode::ASTNode {
+impl Interpret for expression_node::ExpressionNode {
 	fn interpret(&self) -> Result<Value, RuntimeError> {
-		astnode::all_variants!(self, n => n.interpret())
+		expression_node::all_variants!(self, n => n.interpret())
 	}
 }
 
-impl Interpret for astnode::Literal {
+impl Interpret for expression_node::Literal {
 	fn interpret(&self) -> Result<Value, RuntimeError> {
 		Ok(self.clone().into())
 	}
 }
 
-impl Interpret for astnode::BinaryExpr {
+impl Interpret for expression_node::BinaryExpr {
 	fn interpret(&self) -> Result<Value, RuntimeError> {
 		let left_val = self.left.interpret().expect("expected lval");
 		let right_val = self.right.interpret().expect("expected rval");
 		match self.operator {
-			astnode::Operator::BangEqual => Ok((left_val != right_val).into()),
-			astnode::Operator::Less => Ok((left_val < right_val).into()),
-			astnode::Operator::LessEqual => Ok((left_val <= right_val).into()),
-			astnode::Operator::Greater => Ok((left_val > right_val).into()),
-			astnode::Operator::GreaterEqual => Ok((left_val >= right_val).into()),
-			astnode::Operator::EqualEqual => Ok((left_val == right_val).into()),
-			astnode::Operator::Equal => todo!(),
+			expression_node::Operator::BangEqual => Ok((left_val != right_val).into()),
+			expression_node::Operator::Less => Ok((left_val < right_val).into()),
+			expression_node::Operator::LessEqual => Ok((left_val <= right_val).into()),
+			expression_node::Operator::Greater => Ok((left_val > right_val).into()),
+			expression_node::Operator::GreaterEqual => Ok((left_val >= right_val).into()),
+			expression_node::Operator::EqualEqual => Ok((left_val == right_val).into()),
+			expression_node::Operator::Equal => todo!(),
 		}
 	}
 }
 
-impl Interpret for astnode::UnaryExpr {
+impl Interpret for expression_node::UnaryExpr {
 	fn interpret(&self) -> Result<Value, RuntimeError> {
 		let val = self.right.interpret()?;
 		match self.operator {
-			UnaryOperator::Bang => Ok(Value::Bool(!val.truthy())),
-			UnaryOperator::Minus => match val {
+			expression_node::UnaryOperator::Bang => Ok(Value::Bool(!val.truthy())),
+			expression_node::UnaryOperator::Minus => match val {
 				Value::Int(i) => Ok(Value::Int(-i)),
 				Value::Float(f) => Ok(Value::Float(-f)),
 				_ => Err(RuntimeError),
@@ -59,7 +59,7 @@ impl Interpret for astnode::UnaryExpr {
 	}
 }
 
-impl Interpret for astnode::GroupingExpr {
+impl Interpret for expression_node::GroupingExpr {
 	fn interpret(&self) -> Result<Value, RuntimeError> {
 		self.0.interpret()
 	}

src/interpreter/types.rs

@@ -1,4 +1,4 @@
-use crate::ast::astnode;
+use crate::ast::expression::expression_node;
 use from_variants::FromVariants;
 
 #[derive(Debug, PartialEq, PartialOrd, FromVariants)]
@@ -11,10 +11,10 @@ pub enum Value {
 	String(String),
 }
 
-impl From<astnode::Literal> for Value {
-	fn from(l: astnode::Literal) -> Self {
+impl From<expression_node::Literal> for Value {
+	fn from(l: expression_node::Literal) -> Self {
 		match_any::match_any!(l,
-			astnode::Literal::Int(v) | astnode::Literal::Bool(v) | astnode::Literal::Float(v) | astnode::Literal::String(v) => v.into()
+			expression_node::Literal::Int(v) | expression_node::Literal::Bool(v) | expression_node::Literal::Float(v) | expression_node::Literal::String(v) => v.into()
 		)
 	}
 }

src/lib.rs

@@ -3,7 +3,8 @@ pub mod error;
 pub mod interpreter;
 pub mod lexer;
 
-use ast::{astnode::ASTNode, parser::ASTParsingError};
+use ast::expression::expression_node::ExpressionNode;
+use ast::parser::ASTParsingError;
 use interpreter::ast_walker::{Interpret, RuntimeError};
 use interpreter::types::Value;
 use lexer::{token::Token, Lexer, LexingError};
@@ -16,12 +17,12 @@ pub fn lex<'a, 'b>(
 	lexer.scan_tokens()
 }
 
-pub fn parse(tokens: Vec<Token>) -> Result<Vec<ASTNode>, Vec<ASTParsingError>> {
+pub fn parse(tokens: Vec<Token>) -> Result<Vec<ExpressionNode>, Vec<ASTParsingError>> {
 	let mut parser = crate::ast::parser::Parser::new(tokens.into_iter());
-	parser.scan_expressions()
+	parser.parse_all()
 }
 
-pub fn exec(nodes: Vec<ASTNode>) -> Result<Value, RuntimeError> {
+pub fn exec(nodes: Vec<ExpressionNode>) -> Result<Value, RuntimeError> {
 	nodes[0].interpret()
 }