1085 lines
40 KiB
Rust
1085 lines
40 KiB
Rust
use std::{cell::RefCell, collections::HashMap};
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use chumsky::{input::SpannedInput, pratt::*, prelude::*};
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use crate::{
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abstract_tree::*,
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error::Error,
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lexer::{Control, Operator, Token},
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};
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pub type ParserInput<'src> =
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SpannedInput<Token<'src>, SimpleSpan, &'src [(Token<'src>, SimpleSpan)]>;
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pub fn parse<'src>(
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tokens: &'src [(Token<'src>, SimpleSpan)],
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) -> Result<Vec<WithPosition<Statement>>, Vec<Error>> {
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parser()
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.parse(tokens.spanned((tokens.len()..tokens.len()).into()))
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.into_result()
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.map_err(|errors| errors.into_iter().map(|error| error.into()).collect())
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}
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pub fn parser<'src>() -> impl Parser<
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'src,
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ParserInput<'src>,
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Vec<WithPosition<Statement>>,
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extra::Err<Rich<'src, Token<'src>, SimpleSpan>>,
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> {
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let identifiers: RefCell<HashMap<&str, Identifier>> = RefCell::new(HashMap::new());
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let identifier = select! {
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Token::Identifier(text) => {
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let mut identifiers = identifiers.borrow_mut();
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if let Some(identifier) = identifiers.get(&text) {
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identifier.clone()
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} else {
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let new = Identifier::new(text);
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identifiers.insert(text, new.clone());
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new
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}
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}
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};
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let positioned_identifier = identifier
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.clone()
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.map_with(|identifier, state| identifier.with_position(state.span()));
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let basic_value = select! {
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Token::Boolean(boolean) => ValueNode::Boolean(boolean),
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Token::Float(float) => ValueNode::Float(float),
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Token::Integer(integer) => ValueNode::Integer(integer),
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Token::String(string) => ValueNode::String(string.to_string()),
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}
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.map_with(|value, state| Expression::Value(value).with_position(state.span()));
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let r#type = recursive(|r#type| {
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let function_type = r#type
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.clone()
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.separated_by(just(Token::Control(Control::Comma)))
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.collect()
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.delimited_by(
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just(Token::Control(Control::ParenOpen)),
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just(Token::Control(Control::ParenClose)),
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)
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.then_ignore(just(Token::Control(Control::Arrow)))
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.then(r#type.clone())
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.map(|(parameter_types, return_type)| Type::Function {
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parameter_types,
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return_type: Box::new(return_type),
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});
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let list_of = just(Token::Keyword("list"))
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.ignore_then(r#type.clone().delimited_by(
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just(Token::Control(Control::ParenOpen)),
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just(Token::Control(Control::ParenClose)),
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))
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.map(|item_type| Type::ListOf(Box::new(item_type)));
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let list_exact = r#type
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.clone()
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.separated_by(just(Token::Control(Control::Comma)))
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.collect()
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.delimited_by(
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just(Token::Control(Control::SquareOpen)),
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just(Token::Control(Control::SquareClose)),
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)
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.map(|types| Type::ListExact(types));
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choice((
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function_type,
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list_of,
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list_exact,
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just(Token::Keyword("any")).to(Type::Any),
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just(Token::Keyword("bool")).to(Type::Boolean),
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just(Token::Keyword("float")).to(Type::Float),
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just(Token::Keyword("int")).to(Type::Integer),
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just(Token::Keyword("none")).to(Type::None),
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just(Token::Keyword("range")).to(Type::Range),
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just(Token::Keyword("str")).to(Type::String),
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just(Token::Keyword("list")).to(Type::List),
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identifier
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.clone()
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.map(|identifier| Type::Custom(identifier)),
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))
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})
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.map_with(|r#type, state| r#type.with_position(state.span()));
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let type_specification = just(Token::Control(Control::Colon)).ignore_then(r#type.clone());
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let positioned_statement = recursive(|positioned_statement| {
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let block = positioned_statement
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.clone()
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.repeated()
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.collect()
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.delimited_by(
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just(Token::Control(Control::CurlyOpen)),
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just(Token::Control(Control::CurlyClose)),
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)
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.map(|statements| Block::new(statements));
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let positioned_expression = recursive(|positioned_expression| {
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let identifier_expression = identifier.clone().map_with(|identifier, state| {
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Expression::Identifier(identifier).with_position(state.span())
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});
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let raw_integer = select! {
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Token::Integer(integer) => integer
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};
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let range = raw_integer
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.clone()
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.then_ignore(just(Token::Control(Control::DoubleDot)))
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.then(raw_integer)
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.map_with(|(start, end), state| {
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Expression::Value(ValueNode::Range(start..end)).with_position(state.span())
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});
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let list = positioned_expression
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.clone()
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.separated_by(just(Token::Control(Control::Comma)))
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.allow_trailing()
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.collect()
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.delimited_by(
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just(Token::Control(Control::SquareOpen)),
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just(Token::Control(Control::SquareClose)),
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)
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.map_with(|list, state| {
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Expression::Value(ValueNode::List(list)).with_position(state.span())
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});
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let map_assignment = identifier
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.clone()
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.then(type_specification.clone().or_not())
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.then_ignore(just(Token::Operator(Operator::Assign)))
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.then(positioned_expression.clone())
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.map(|((identifier, r#type), expression)| (identifier, r#type, expression));
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let map = map_assignment
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.separated_by(just(Token::Control(Control::Comma)).or_not())
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.allow_trailing()
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.collect()
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.delimited_by(
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just(Token::Control(Control::CurlyOpen)),
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just(Token::Control(Control::CurlyClose)),
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)
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.map_with(|map_assigment_list, state| {
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Expression::Value(ValueNode::Map(map_assigment_list))
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.with_position(state.span())
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});
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let function = identifier
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.clone()
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.then(type_specification.clone())
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.separated_by(just(Token::Control(Control::Comma)))
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.collect()
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.delimited_by(
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just(Token::Control(Control::ParenOpen)),
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just(Token::Control(Control::ParenClose)),
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)
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.then(type_specification.clone())
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.then(block.clone())
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.map_with(|((parameters, return_type), body), state| {
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Expression::Value(ValueNode::Function {
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parameters,
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return_type,
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body: body.with_position(state.span()),
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})
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.with_position(state.span())
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});
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let atom = choice((
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function.clone(),
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identifier_expression.clone(),
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basic_value.clone(),
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list.clone(),
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map.clone(),
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positioned_expression.clone().delimited_by(
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just(Token::Control(Control::ParenOpen)),
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just(Token::Control(Control::ParenClose)),
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),
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));
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use Operator::*;
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let logic_math_indexes_and_function_calls = atom.pratt((
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prefix(2, just(Token::Operator(Not)), |_, expression, span| {
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Expression::Logic(Box::new(Logic::Not(expression))).with_position(span)
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}),
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postfix(
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2,
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positioned_expression.clone().delimited_by(
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just(Token::Control(Control::SquareOpen)),
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just(Token::Control(Control::SquareClose)),
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),
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|left, right, span| {
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Expression::ListIndex(Box::new(ListIndex::new(left, right)))
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.with_position(span)
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},
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),
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postfix(
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3,
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positioned_expression
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.clone()
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.separated_by(just(Token::Control(Control::Comma)))
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.collect()
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.delimited_by(
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just(Token::Control(Control::ParenOpen)),
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just(Token::Control(Control::ParenClose)),
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),
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|op, expression, span| {
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Expression::FunctionCall(FunctionCall::new(op, expression))
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.with_position(span)
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},
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),
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infix(
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left(4),
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just(Token::Control(Control::Dot)),
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|left, _, right, span| {
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Expression::MapIndex(Box::new(MapIndex::new(left, right)))
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.with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(Equal)),
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|left, _, right, span| {
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Expression::Logic(Box::new(Logic::Equal(left, right))).with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(NotEqual)),
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|left, _, right, span| {
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Expression::Logic(Box::new(Logic::NotEqual(left, right)))
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.with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(Greater)),
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|left, _, right, span| {
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Expression::Logic(Box::new(Logic::Greater(left, right))).with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(Less)),
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|left, _, right, span| {
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Expression::Logic(Box::new(Logic::Less(left, right))).with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(GreaterOrEqual)),
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|left, _, right, span| {
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Expression::Logic(Box::new(Logic::GreaterOrEqual(left, right)))
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.with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(LessOrEqual)),
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|left, _, right, span| {
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Expression::Logic(Box::new(Logic::LessOrEqual(left, right)))
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.with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(And)),
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|left, _, right, span| {
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Expression::Logic(Box::new(Logic::And(left, right))).with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(Or)),
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|left, _, right, span| {
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Expression::Logic(Box::new(Logic::Or(left, right))).with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(Add)),
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|left, _, right, span| {
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Expression::Math(Box::new(Math::Add(left, right))).with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(Subtract)),
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|left, _, right, span| {
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Expression::Math(Box::new(Math::Subtract(left, right))).with_position(span)
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},
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),
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infix(
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left(2),
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just(Token::Operator(Multiply)),
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|left, _, right, span| {
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Expression::Math(Box::new(Math::Multiply(left, right))).with_position(span)
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},
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),
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infix(
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left(2),
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just(Token::Operator(Divide)),
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|left, _, right, span| {
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Expression::Math(Box::new(Math::Divide(left, right))).with_position(span)
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},
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),
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infix(
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left(1),
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just(Token::Operator(Modulo)),
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|left, _, right, span| {
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Expression::Math(Box::new(Math::Modulo(left, right))).with_position(span)
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},
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),
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));
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choice((
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range,
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logic_math_indexes_and_function_calls,
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function,
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list,
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map,
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basic_value,
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identifier_expression,
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))
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});
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let expression_statement =
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positioned_expression
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.clone()
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.map(|WithPosition { node, position }| {
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Statement::Expression(node).with_position(position)
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});
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let r#break = just(Token::Keyword("break"))
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.map_with(|_, state| Statement::Break.with_position(state.span()));
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let assignment = positioned_identifier
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.clone()
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.then(type_specification.clone().or_not())
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.then(choice((
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just(Token::Operator(Operator::Assign)).to(AssignmentOperator::Assign),
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just(Token::Operator(Operator::AddAssign)).to(AssignmentOperator::AddAssign),
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just(Token::Operator(Operator::SubAssign)).to(AssignmentOperator::SubAssign),
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)))
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.then(positioned_statement.clone())
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.map_with(|(((identifier, r#type), operator), statement), state| {
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Statement::Assignment(Assignment::new(identifier, r#type, operator, statement))
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.with_position(state.span())
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});
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let block_statement = block
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.clone()
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.map_with(|block, state| Statement::Block(block).with_position(state.span()));
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let r#loop = positioned_statement
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.clone()
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.repeated()
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.at_least(1)
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.collect()
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.delimited_by(
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just(Token::Keyword("loop")).then(just(Token::Control(Control::CurlyOpen))),
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just(Token::Control(Control::CurlyClose)),
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)
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.map_with(|statements, state| {
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Statement::Loop(Loop::new(statements)).with_position(state.span())
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});
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let r#while = just(Token::Keyword("while"))
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.ignore_then(positioned_expression.clone())
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.then(
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positioned_statement
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.clone()
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.repeated()
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.collect()
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.delimited_by(
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just(Token::Control(Control::CurlyOpen)),
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just(Token::Control(Control::CurlyClose)),
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),
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)
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.map_with(|(expression, statements), state| {
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Statement::While(While::new(expression, statements)).with_position(state.span())
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});
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let if_else = just(Token::Keyword("if"))
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.ignore_then(positioned_expression.clone())
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.then(block.clone())
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.then(
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just(Token::Keyword("else"))
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.ignore_then(block.clone())
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.or_not(),
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)
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.map_with(|((if_expression, if_block), else_block), state| {
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Statement::IfElse(IfElse::new(if_expression, if_block, else_block))
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.with_position(state.span())
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});
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choice((
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if_else,
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assignment,
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expression_statement,
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r#break,
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block_statement,
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r#loop,
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r#while,
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))
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.then_ignore(just(Token::Control(Control::Semicolon)).or_not())
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});
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positioned_statement.repeated().collect()
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}
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#[cfg(test)]
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mod tests {
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use crate::lexer::lex;
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use super::*;
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|
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#[test]
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fn map_index() {
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assert_eq!(
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parse(&lex("{ x = 42}.x").unwrap()).unwrap()[0].node,
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Statement::Expression(Expression::MapIndex(Box::new(MapIndex::new(
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Expression::Value(ValueNode::Map(vec![(
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Identifier::new("x"),
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None,
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Expression::Value(ValueNode::Integer(42)).with_position((6, 8))
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)]))
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.with_position((0, 9)),
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Expression::Identifier(Identifier::new("x")).with_position((10, 11))
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))))
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);
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assert_eq!(
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parse(&lex("foo.x").unwrap()).unwrap()[0].node,
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Statement::Expression(Expression::MapIndex(Box::new(MapIndex::new(
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Expression::Identifier(Identifier::new("foo")).with_position((0, 3)),
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Expression::Identifier(Identifier::new("x")).with_position((4, 5))
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))))
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);
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}
|
|
|
|
#[test]
|
|
fn r#while() {
|
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assert_eq!(
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parse(&lex("while true { output('hi') }").unwrap()).unwrap()[0].node,
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Statement::While(While::new(
|
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Expression::Value(ValueNode::Boolean(true)).with_position((6, 11)),
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vec![
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Statement::Expression(Expression::FunctionCall(FunctionCall::new(
|
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Expression::Identifier(Identifier::new("output")).with_position((13, 19)),
|
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vec![Expression::Value(ValueNode::String("hi".to_string()))
|
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.with_position((20, 24))]
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)))
|
|
.with_position((13, 26))
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]
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))
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)
|
|
}
|
|
|
|
#[test]
|
|
fn boolean_type() {
|
|
assert_eq!(
|
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parse(&lex("foobar : bool = true").unwrap()).unwrap()[0].node,
|
|
Statement::Assignment(Assignment::new(
|
|
Identifier::new("foobar").with_position((0, 6)),
|
|
Some(Type::Boolean.with_position((9, 14))),
|
|
AssignmentOperator::Assign,
|
|
Statement::Expression(Expression::Value(ValueNode::Boolean(true)))
|
|
.with_position((16, 20))
|
|
),)
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|
);
|
|
}
|
|
|
|
#[test]
|
|
fn list_type() {
|
|
assert_eq!(
|
|
parse(&lex("foobar: list = []").unwrap()).unwrap()[0].node,
|
|
Statement::Assignment(Assignment::new(
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|
Identifier::new("foobar").with_position((0, 6)),
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|
Some(Type::List.with_position((8, 13))),
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|
AssignmentOperator::Assign,
|
|
Statement::Expression(Expression::Value(ValueNode::List(vec![])))
|
|
.with_position((15, 17))
|
|
),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn list_of_type() {
|
|
assert_eq!(
|
|
parse(&lex("foobar : list(bool) = [true]").unwrap()).unwrap()[0].node,
|
|
Statement::Assignment(Assignment::new(
|
|
Identifier::new("foobar").with_position((0, 6)),
|
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Some(Type::ListOf(Box::new(Type::Boolean)).with_position((9, 20))),
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|
AssignmentOperator::Assign,
|
|
Statement::Expression(Expression::Value(ValueNode::List(vec![Expression::Value(
|
|
ValueNode::Boolean(true)
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|
)
|
|
.with_position((23, 27))])))
|
|
.with_position((22, 28))
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|
))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn list_exact_type() {
|
|
assert_eq!(
|
|
parse(&lex("foobar : [bool, str] = [true, '42']").unwrap()).unwrap()[0],
|
|
Statement::Assignment(Assignment::new(
|
|
Identifier::new("foobar").with_position((0, 6)),
|
|
Some(Type::ListExact(vec![Type::Boolean, Type::String]).with_position((9, 21))),
|
|
AssignmentOperator::Assign,
|
|
Statement::Expression(Expression::Value(ValueNode::List(vec![
|
|
Expression::Value(ValueNode::Boolean(true)).with_position((24, 28)),
|
|
Expression::Value(ValueNode::String("42".to_string())).with_position((30, 34))
|
|
])))
|
|
.with_position((23, 35))
|
|
),)
|
|
.with_position((0, 35))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn function_type() {
|
|
assert_eq!(
|
|
parse(&lex("foobar : () -> any = some_function").unwrap()).unwrap()[0].node,
|
|
Statement::Assignment(Assignment::new(
|
|
Identifier::new("foobar").with_position((0, 6)),
|
|
Some(
|
|
Type::Function {
|
|
parameter_types: vec![],
|
|
return_type: Box::new(Type::Any)
|
|
}
|
|
.with_position((9, 19))
|
|
),
|
|
AssignmentOperator::Assign,
|
|
Statement::Expression(Expression::Identifier(Identifier::new("some_function")))
|
|
.with_position((21, 34))
|
|
),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn function_call() {
|
|
assert_eq!(
|
|
parse(&lex("output()").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::FunctionCall(FunctionCall::new(
|
|
Expression::Identifier(Identifier::new("output")).with_position((0, 6)),
|
|
Vec::with_capacity(0),
|
|
)))
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn range() {
|
|
assert_eq!(
|
|
parse(&lex("1..10").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Range(1..10)))
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn function() {
|
|
assert_eq!(
|
|
parse(&lex("(x: int) : int { x }").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Function {
|
|
parameters: vec![(Identifier::new("x"), Type::Integer.with_position((4, 7)))],
|
|
return_type: Type::Integer.with_position((11, 15)),
|
|
body: Block::new(vec![Statement::Expression(Expression::Identifier(
|
|
Identifier::new("x")
|
|
),)
|
|
.with_position((17, 18))])
|
|
.with_position((0, 20))
|
|
}),)
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn r#if() {
|
|
assert_eq!(
|
|
parse(&lex("if true { 'foo' }").unwrap()).unwrap()[0].node,
|
|
Statement::IfElse(IfElse::new(
|
|
Expression::Value(ValueNode::Boolean(true)).with_position((3, 8)),
|
|
Block::new(vec![Statement::Expression(Expression::Value(
|
|
ValueNode::String("foo".to_string())
|
|
),)
|
|
.with_position((10, 15))]),
|
|
None
|
|
),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn if_else() {
|
|
assert_eq!(
|
|
parse(&lex("if true {'foo' } else { 'bar' }").unwrap()).unwrap()[0].node,
|
|
Statement::IfElse(IfElse::new(
|
|
Expression::Value(ValueNode::Boolean(true)).with_position((3, 8)),
|
|
Block::new(vec![Statement::Expression(Expression::Value(
|
|
ValueNode::String("foo".to_string())
|
|
),)
|
|
.with_position((9, 14))]),
|
|
Some(Block::new(vec![Statement::Expression(Expression::Value(
|
|
ValueNode::String("bar".to_string())
|
|
),)
|
|
.with_position((24, 29))]))
|
|
),)
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn map() {
|
|
assert_eq!(
|
|
parse(&lex("{ foo = 'bar' }").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Map(vec![(
|
|
Identifier::new("foo"),
|
|
None,
|
|
Expression::Value(ValueNode::String("bar".to_string())).with_position((8, 13))
|
|
)])),)
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("{ x = 1, y = 2, }").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Map(vec![
|
|
(
|
|
Identifier::new("x"),
|
|
None,
|
|
Expression::Value(ValueNode::Integer(1)).with_position((6, 7))
|
|
),
|
|
(
|
|
Identifier::new("y"),
|
|
None,
|
|
Expression::Value(ValueNode::Integer(2)).with_position((13, 14))
|
|
),
|
|
])),)
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("{ x = 1 y = 2 }").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Map(vec![
|
|
(
|
|
Identifier::new("x"),
|
|
None,
|
|
Expression::Value(ValueNode::Integer(1)).with_position((6, 7))
|
|
),
|
|
(
|
|
Identifier::new("y"),
|
|
None,
|
|
Expression::Value(ValueNode::Integer(2)).with_position((12, 13))
|
|
),
|
|
])),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn math() {
|
|
assert_eq!(
|
|
parse(&lex("1 + 1").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Math(Box::new(Math::Add(
|
|
Expression::Value(ValueNode::Integer(1)).with_position((0, 1)),
|
|
Expression::Value(ValueNode::Integer(1)).with_position((4, 5))
|
|
))),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn r#loop() {
|
|
assert_eq!(
|
|
parse(&lex("loop { 42 }").unwrap()).unwrap()[0].node,
|
|
Statement::Loop(Loop::new(vec![Statement::Expression(Expression::Value(
|
|
ValueNode::Integer(42)
|
|
),)
|
|
.with_position((7, 9))]),)
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("loop { if i > 2 { break } else { i += 1 } }").unwrap()).unwrap()[0].node,
|
|
Statement::Loop(Loop::new(vec![Statement::IfElse(IfElse::new(
|
|
Expression::Logic(Box::new(Logic::Greater(
|
|
Expression::Identifier(Identifier::new("i")).with_position((10, 11)),
|
|
Expression::Value(ValueNode::Integer(2)).with_position((14, 15))
|
|
)))
|
|
.with_position((10, 15)),
|
|
Block::new(vec![Statement::Break.with_position((18, 24))]),
|
|
Some(Block::new(vec![Statement::Assignment(Assignment::new(
|
|
Identifier::new("i").with_position((33, 34)),
|
|
None,
|
|
AssignmentOperator::AddAssign,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(1)))
|
|
.with_position((38, 39))
|
|
))
|
|
.with_position((33, 39))]))
|
|
),)
|
|
.with_position((7, 42))]))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn block() {
|
|
assert_eq!(
|
|
parse(&lex("{ x }").unwrap()).unwrap()[0].node,
|
|
Statement::Block(Block::new(vec![Statement::Expression(
|
|
Expression::Identifier(Identifier::new("x")),
|
|
)
|
|
.with_position((2, 3))]),)
|
|
);
|
|
|
|
assert_eq!(
|
|
parse(
|
|
&lex("
|
|
{
|
|
x;
|
|
y;
|
|
z
|
|
}
|
|
")
|
|
.unwrap()
|
|
)
|
|
.unwrap()[0]
|
|
.node,
|
|
Statement::Block(Block::new(vec![
|
|
Statement::Expression(Expression::Identifier(Identifier::new("x")))
|
|
.with_position((39, 40)),
|
|
Statement::Expression(Expression::Identifier(Identifier::new("y")))
|
|
.with_position((62, 63)),
|
|
Statement::Expression(Expression::Identifier(Identifier::new("z")))
|
|
.with_position((85, 86)),
|
|
]),)
|
|
);
|
|
|
|
assert_eq!(
|
|
parse(
|
|
&lex("
|
|
{
|
|
1 == 1
|
|
z
|
|
}
|
|
")
|
|
.unwrap()
|
|
)
|
|
.unwrap()[0]
|
|
.node,
|
|
Statement::Block(Block::new(vec![
|
|
Statement::Expression(Expression::Logic(Box::new(Logic::Equal(
|
|
Expression::Value(ValueNode::Integer(1)).with_position((39, 40)),
|
|
Expression::Value(ValueNode::Integer(1)).with_position((44, 45))
|
|
))),)
|
|
.with_position((39, 45)),
|
|
Statement::Expression(Expression::Identifier(Identifier::new("z")))
|
|
.with_position((66, 67)),
|
|
]),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn identifier() {
|
|
assert_eq!(
|
|
parse(&lex("x").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Identifier(Identifier::new("x")))
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("foobar").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Identifier(Identifier::new("foobar")))
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("HELLO").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Identifier(Identifier::new("HELLO")))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn assignment() {
|
|
assert_eq!(
|
|
parse(&lex("foobar = 1").unwrap()).unwrap()[0].node,
|
|
Statement::Assignment(Assignment::new(
|
|
Identifier::new("foobar").with_position((0, 6)),
|
|
None,
|
|
AssignmentOperator::Assign,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(1)))
|
|
.with_position((9, 10))
|
|
),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn assignment_with_type() {
|
|
assert_eq!(
|
|
parse(&lex("foobar: int = 1").unwrap()).unwrap()[0].node,
|
|
Statement::Assignment(Assignment::new(
|
|
Identifier::new("foobar").with_position((0, 6)),
|
|
Some(Type::Integer.with_position((8, 12))),
|
|
AssignmentOperator::Assign,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(1)))
|
|
.with_position((14, 15))
|
|
),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn logic() {
|
|
assert_eq!(
|
|
parse(&lex("x == 1").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Logic(Box::new(Logic::Equal(
|
|
Expression::Identifier(Identifier::new("x")).with_position((0, 1)),
|
|
Expression::Value(ValueNode::Integer(1)).with_position((5, 6)),
|
|
))),)
|
|
);
|
|
|
|
assert_eq!(
|
|
parse(&lex("(x == 1) && (y == 2)").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Logic(Box::new(Logic::And(
|
|
Expression::Logic(Box::new(Logic::Equal(
|
|
Expression::Identifier(Identifier::new("x")).with_position((1, 2)),
|
|
Expression::Value(ValueNode::Integer(1)).with_position((6, 7)),
|
|
)))
|
|
.with_position((1, 7)),
|
|
Expression::Logic(Box::new(Logic::Equal(
|
|
Expression::Identifier(Identifier::new("y")).with_position((13, 14)),
|
|
Expression::Value(ValueNode::Integer(2)).with_position((18, 19)),
|
|
)))
|
|
.with_position((13, 19)),
|
|
))),)
|
|
);
|
|
|
|
assert_eq!(
|
|
parse(&lex("(x == 1) && (y == 2) && true").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Logic(Box::new(Logic::And(
|
|
Expression::Logic(Box::new(Logic::And(
|
|
Expression::Logic(Box::new(Logic::Equal(
|
|
Expression::Identifier(Identifier::new("x")).with_position((1, 2)),
|
|
Expression::Value(ValueNode::Integer(1)).with_position((6, 7))
|
|
)))
|
|
.with_position((1, 7)),
|
|
Expression::Logic(Box::new(Logic::Equal(
|
|
Expression::Identifier(Identifier::new("y")).with_position((13, 14)),
|
|
Expression::Value(ValueNode::Integer(2)).with_position((18, 19))
|
|
)))
|
|
.with_position((13, 19)),
|
|
)))
|
|
.with_position((0, 21)),
|
|
Expression::Value(ValueNode::Boolean(true)).with_position((24, 28))
|
|
))),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn list() {
|
|
assert_eq!(
|
|
parse(&lex("[]").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::List(Vec::with_capacity(0))),)
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("[42]").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::List(vec![Expression::Value(
|
|
ValueNode::Integer(42)
|
|
)
|
|
.with_position((1, 3))])),)
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("[42, 'foo', 'bar', [1, 2, 3,]]").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::List(vec![
|
|
Expression::Value(ValueNode::Integer(42)).with_position((1, 3)),
|
|
Expression::Value(ValueNode::String("foo".to_string())).with_position((5, 10)),
|
|
Expression::Value(ValueNode::String("bar".to_string())).with_position((12, 17)),
|
|
Expression::Value(ValueNode::List(vec![
|
|
Expression::Value(ValueNode::Integer(1)).with_position((20, 21)),
|
|
Expression::Value(ValueNode::Integer(2)).with_position((23, 24)),
|
|
Expression::Value(ValueNode::Integer(3)).with_position((26, 27)),
|
|
]))
|
|
.with_position((19, 29))
|
|
])),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn r#true() {
|
|
assert_eq!(
|
|
parse(&lex("true").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Boolean(true)))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn r#false() {
|
|
assert_eq!(
|
|
parse(&lex("false").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Boolean(false)))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn positive_float() {
|
|
assert_eq!(
|
|
parse(&lex("0.0").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(0.0)))
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("42.0").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(42.0)))
|
|
);
|
|
|
|
let max_float = f64::MAX.to_string() + ".0";
|
|
|
|
assert_eq!(
|
|
parse(&lex(&max_float).unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(f64::MAX)))
|
|
);
|
|
|
|
let min_positive_float = f64::MIN_POSITIVE.to_string();
|
|
|
|
assert_eq!(
|
|
parse(&lex(&min_positive_float).unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(f64::MIN_POSITIVE)),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn negative_float() {
|
|
assert_eq!(
|
|
parse(&lex("-0.0").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(-0.0)))
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("-42.0").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(-42.0)))
|
|
);
|
|
|
|
let min_float = f64::MIN.to_string() + ".0";
|
|
|
|
assert_eq!(
|
|
parse(&lex(&min_float).unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(f64::MIN)))
|
|
);
|
|
|
|
let max_negative_float = format!("-{}", f64::MIN_POSITIVE);
|
|
|
|
assert_eq!(
|
|
parse(&lex(&max_negative_float).unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(-f64::MIN_POSITIVE)),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn other_float() {
|
|
assert_eq!(
|
|
parse(&lex("Infinity").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(f64::INFINITY)))
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("-Infinity").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Float(f64::NEG_INFINITY)),)
|
|
);
|
|
|
|
if let Statement::Expression(Expression::Value(ValueNode::Float(float))) =
|
|
&parse(&lex("NaN").unwrap()).unwrap()[0].node
|
|
{
|
|
assert!(float.is_nan());
|
|
} else {
|
|
panic!("Expected a float.");
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn positive_integer() {
|
|
for i in 0..10 {
|
|
let source = i.to_string();
|
|
let tokens = lex(&source).unwrap();
|
|
let statements = parse(&tokens).unwrap();
|
|
|
|
assert_eq!(
|
|
statements[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(i)))
|
|
)
|
|
}
|
|
|
|
assert_eq!(
|
|
parse(&lex("42").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(42)))
|
|
);
|
|
|
|
let maximum_integer = i64::MAX.to_string();
|
|
|
|
assert_eq!(
|
|
parse(&lex(&maximum_integer).unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(i64::MAX)))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn negative_integer() {
|
|
for i in -9..1 {
|
|
let source = i.to_string();
|
|
let tokens = lex(&source).unwrap();
|
|
let statements = parse(&tokens).unwrap();
|
|
|
|
assert_eq!(
|
|
statements[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(i)))
|
|
)
|
|
}
|
|
|
|
assert_eq!(
|
|
parse(&lex("-42").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(-42)))
|
|
);
|
|
|
|
let minimum_integer = i64::MIN.to_string();
|
|
|
|
assert_eq!(
|
|
parse(&lex(&minimum_integer).unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::Integer(i64::MIN)))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn double_quoted_string() {
|
|
assert_eq!(
|
|
parse(&lex("\"\"").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("".to_string())))
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("\"42\"").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("42".to_string())),)
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("\"foobar\"").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("foobar".to_string())),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn single_quoted_string() {
|
|
assert_eq!(
|
|
parse(&lex("''").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("".to_string())))
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("'42'").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("42".to_string())),)
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("'foobar'").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("foobar".to_string())),)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn grave_quoted_string() {
|
|
assert_eq!(
|
|
parse(&lex("``").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("".to_string())))
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("`42`").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("42".to_string())),)
|
|
);
|
|
assert_eq!(
|
|
parse(&lex("`foobar`").unwrap()).unwrap()[0].node,
|
|
Statement::Expression(Expression::Value(ValueNode::String("foobar".to_string())),)
|
|
);
|
|
}
|
|
}
|