Implemented mod and replaced Braced with RootNode
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1bc2909c1b
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a1ba054609
@ -82,6 +82,13 @@ mod test {
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assert_eq!(eval("7/(7/(7/(7/(7/(7)))))"), Ok(Value::Int(1)));
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}
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#[test]
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fn test_mod_examples() {
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assert_eq!(eval("1 % 4"), Ok(Value::Int(1)));
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assert_eq!(eval("6 % 4"), Ok(Value::Int(2)));
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assert_eq!(eval("1 % 4 + 2"), Ok(Value::Int(3)));
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}
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#[test]
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fn test_type_errors() {
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assert_eq!(
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@ -21,12 +21,14 @@ pub trait Operator {
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}
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pub struct RootNode;
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pub struct Braced;
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pub struct Add;
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pub struct Sub;
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pub struct Neg;
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pub struct Mul;
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pub struct Div;
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pub struct Braced;
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pub struct Mod;
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pub struct Const {
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value: Value,
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@ -50,15 +52,16 @@ impl Identifier {
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impl Operator for RootNode {
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fn precedence(&self) -> i32 {
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i32::min_value()
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200
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}
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fn argument_amount(&self) -> usize {
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1
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}
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fn eval(&self, _arguments: &[Value], _configuration: &Configuration) -> Result<Value, Error> {
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Err(Error::EvaluatedRootNode)
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fn eval(&self, arguments: &[Value], _configuration: &Configuration) -> Result<Value, Error> {
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expect_argument_amount(arguments.len(), 1)?;
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Ok(arguments[0].clone())
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}
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}
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@ -187,6 +190,32 @@ impl Operator for Div {
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}
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}
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impl Operator for Mod {
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fn precedence(&self) -> i32 {
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100
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}
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fn argument_amount(&self) -> usize {
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2
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}
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fn eval(&self, arguments: &[Value], _configuration: &Configuration) -> Result<Value, Error> {
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expect_argument_amount(arguments.len(), 2)?;
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expect_number(&arguments[0])?;
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expect_number(&arguments[1])?;
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if arguments[0].is_int() && arguments[1].is_int() {
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Ok(Value::Int(
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arguments[0].as_int().unwrap() % arguments[1].as_int().unwrap(),
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))
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} else {
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Ok(Value::Float(
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arguments[0].as_float().unwrap() % arguments[1].as_float().unwrap(),
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))
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}
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}
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}
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impl Operator for Const {
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fn precedence(&self) -> i32 {
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200
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@ -218,18 +247,3 @@ impl Operator for Identifier {
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configuration.get_value(&self.identifier)
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}
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}
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impl Operator for Braced {
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fn precedence(&self) -> i32 {
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200
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}
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fn argument_amount(&self) -> usize {
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1
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}
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fn eval(&self, arguments: &[Value], configuration: &Configuration) -> Result<Value, Error> {
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expect_argument_amount(arguments.len(), 1)?;
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Ok(arguments[0].clone())
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}
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}
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@ -7,6 +7,7 @@ pub enum Token {
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Minus,
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Star,
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Slash,
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Percent,
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LBrace,
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RBrace,
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Whitespace,
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@ -30,6 +31,7 @@ fn char_to_token(c: char) -> PartialToken {
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'-' => PartialToken::Token(Token::Minus),
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'*' => PartialToken::Token(Token::Star),
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'/' => PartialToken::Token(Token::Slash),
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'%' => PartialToken::Token(Token::Percent),
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'(' => PartialToken::Token(Token::LBrace),
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')' => PartialToken::Token(Token::RBrace),
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c => {
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@ -50,6 +52,7 @@ impl Token {
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Token::Minus => false,
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Token::Star => false,
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Token::Slash => false,
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Token::Percent => false,
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Token::LBrace => false,
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Token::RBrace => true,
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Token::Whitespace => false,
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@ -17,10 +17,6 @@ impl Node {
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fn root_node() -> Self {
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Self::new(RootNode)
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}
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fn braced_node() -> Self {
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Self::new(Braced)
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}
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pub fn eval(&self, configuration: &Configuration) -> Result<Value, Error> {
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let mut arguments = Vec::new();
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@ -91,8 +87,9 @@ pub fn tokens_to_operator_tree(tokens: Vec<Token>) -> Result<Node, Error> {
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}
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Token::Star => Some(Node::new(Mul)),
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Token::Slash => Some(Node::new(Div)),
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Token::Percent => Some(Node::new(Mod)),
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Token::LBrace => {
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root.push(Node::braced_node());
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root.push(Node::root_node());
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None
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},
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Token::RBrace => {
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