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Continue adding mutable variables

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This commit is contained in:
Jeff 2024-08-14 01:13:43 -04:00
parent 535e120256
commit 3ff3a7568c
4 changed files with 40 additions and 29 deletions
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29
dust-lang/src/lexer.rs
View File

@ -429,6 +429,7 @@ impl Lexer {
"is_even" => Token::IsEven,
"is_odd" => Token::IsOdd,
"length" => Token::Length,
"mut" => Token::Mut,
"read_line" => Token::ReadLine,
"struct" => Token::Struct,
"to_string" => Token::ToString,
@ -506,34 +507,6 @@ impl Display for LexError {
mod tests {
use super::*;
#[test]
fn all_keywords() {
let input = "async bool else false float if int is_even is_odd length read_line struct to_string true while write_line";
assert_eq!(
lex(input),
Ok(vec![
(Token::Async, (0, 5)),
(Token::Bool, (6, 10)),
(Token::Else, (11, 15)),
(Token::Boolean("false"), (16, 21)),
(Token::FloatKeyword, (22, 27)),
(Token::If, (28, 30)),
(Token::Int, (31, 34)),
(Token::IsEven, (35, 42)),
(Token::IsOdd, (43, 49)),
(Token::Length, (50, 56)),
(Token::ReadLine, (57, 66)),
(Token::Struct, (67, 73)),
(Token::ToString, (74, 83)),
(Token::Boolean("true"), (84, 88)),
(Token::While, (89, 94)),
(Token::WriteLine, (95, 105)),
(Token::Eof, (105, 105)),
])
);
}
#[test]
fn unit_struct() {
let input = "struct Foo";

23
dust-lang/src/parser.rs
View File

@ -1211,6 +1211,29 @@ mod tests {
use super::*;
#[test]
fn mutable_variable() {
let input = "mut x = 42";
assert_eq!(
parse(input),
Ok(AbstractSyntaxTree {
nodes: [Node::new(
Statement::Assignment {
identifier: Node::new(Identifier::new("x"), (4, 5)),
operator: Node::new(AssignmentOperator::Assign, (6, 7)),
value: Box::new(Node::new(
Statement::Constant(Value::integer(42)),
(8, 10)
)),
},
(0, 10)
)]
.into()
})
);
}
#[test]
fn async_block() {
let input = "async { x = 42; y = 4.0 }";

11
dust-lang/src/token.rs
View File

@ -26,6 +26,7 @@ pub enum Token<'src> {
IsEven,
IsOdd,
Length,
Mut,
ReadLine,
Str,
Struct,
@ -98,6 +99,7 @@ impl<'src> Token<'src> {
Token::LessEqual => TokenOwned::LessOrEqual,
Token::Minus => TokenOwned::Minus,
Token::MinusEqual => TokenOwned::MinusEqual,
Token::Mut => TokenOwned::Mut,
Token::Percent => TokenOwned::Percent,
Token::Plus => TokenOwned::Plus,
Token::PlusEqual => TokenOwned::PlusEqual,
@ -153,6 +155,7 @@ impl<'src> Token<'src> {
Token::LessEqual => "<=",
Token::Minus => "-",
Token::MinusEqual => "-=",
Token::Mut => "mut",
Token::Percent => "%",
Token::Plus => "+",
Token::PlusEqual => "+=",
@ -205,6 +208,7 @@ impl<'src> Token<'src> {
Token::LessEqual => TokenKind::LessOrEqual,
Token::Minus => TokenKind::Minus,
Token::MinusEqual => TokenKind::MinusEqual,
Token::Mut => TokenKind::Mut,
Token::Percent => TokenKind::Percent,
Token::Plus => TokenKind::Plus,
Token::PlusEqual => TokenKind::PlusEqual,
@ -306,6 +310,7 @@ pub enum TokenOwned {
IsEven,
IsOdd,
Length,
Mut,
ReadLine,
Str,
ToString,
@ -379,6 +384,7 @@ impl Display for TokenOwned {
TokenOwned::LessOrEqual => Token::LessEqual.fmt(f),
TokenOwned::Minus => Token::Minus.fmt(f),
TokenOwned::MinusEqual => Token::MinusEqual.fmt(f),
TokenOwned::Mut => Token::Mut.fmt(f),
TokenOwned::Percent => Token::Percent.fmt(f),
TokenOwned::Plus => Token::Plus.fmt(f),
TokenOwned::PlusEqual => Token::PlusEqual.fmt(f),
@ -447,6 +453,7 @@ pub enum TokenKind {
LessOrEqual,
Minus,
MinusEqual,
Mut,
Percent,
Plus,
PlusEqual,
@ -494,6 +501,7 @@ impl Display for TokenKind {
TokenKind::LessOrEqual => Token::LessEqual.fmt(f),
TokenKind::Minus => Token::Minus.fmt(f),
TokenKind::MinusEqual => Token::MinusEqual.fmt(f),
TokenKind::Mut => Token::Mut.fmt(f),
TokenKind::Percent => Token::Percent.fmt(f),
TokenKind::Plus => Token::Plus.fmt(f),
TokenKind::PlusEqual => Token::PlusEqual.fmt(f),
@ -518,7 +526,7 @@ impl Display for TokenKind {
pub(crate) mod tests {
use super::*;
pub fn all_tokens<'src>() -> [Token<'src>; 47] {
pub fn all_tokens<'src>() -> [Token<'src>; 48] {
[
Token::Async,
Token::Bang,
@ -552,6 +560,7 @@ pub(crate) mod tests {
Token::LessEqual,
Token::Minus,
Token::MinusEqual,
Token::Mut,
Token::Percent,
Token::Plus,
Token::PlusEqual,

6
dust-lang/src/value.rs
View File

@ -91,6 +91,10 @@ impl Value {
Value::Immutable(Arc::new(ValueData::Struct(r#struct)))
}
pub fn boolean_mut(boolean: bool) -> Self {
Value::Mutable(Arc::new(RwLock::new(ValueData::Boolean(boolean))))
}
pub fn r#type(&self) -> Type {
match self {
Value::Immutable(inner) => inner.r#type(),
@ -1421,6 +1425,7 @@ pub enum ValueError {
CannotLessThanOrEqual(Value, Value),
CannotModulo(Value, Value),
CannotMultiply(Value, Value),
CannotMutate(Value),
CannotSubtract(Value, Value),
CannotOr(Value, Value),
DivisionByZero,
@ -1448,6 +1453,7 @@ impl Display for ValueError {
ValueError::CannotMultiply(left, right) => {
write!(f, "Cannot multiply {} and {}", left, right)
}
ValueError::CannotMutate(value) => write!(f, "Cannot mutate {}", value),
ValueError::CannotSubtract(left, right) => {
write!(f, "Cannot subtract {} and {}", left, right)
}