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Implement unary operators and divide binary parsing

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This commit is contained in:
Jeff 2024-09-23 01:45:52 -04:00
parent 23f733d8b2
commit c5c2fe95ae
2 changed files with 26 additions and 25 deletions
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37
dust-lang/src/parser/mod.rs
View File

@ -322,35 +322,32 @@ impl<'src> Parser<'src> {
let (previous_instruction, previous_position) =
self.chunk.pop_instruction(self.current_position)?;
let (is_constant, destination, from_register) = match previous_instruction.operation() {
let (push_back, is_constant, argument) = {
match previous_instruction.operation() {
Operation::GetLocal => (false, false, previous_instruction.destination()),
Operation::LoadConstant => {
self.decrement_register()?;
(
true,
previous_instruction.destination(),
previous_instruction.first_argument(),
)
(false, true, previous_instruction.first_argument())
}
Operation::LoadBoolean => {
self.decrement_register()?;
self.increment_register()?;
(
true,
previous_instruction.destination(),
previous_instruction.first_argument(),
)
(true, false, previous_instruction.destination())
}
_ => {
self.emit_instruction(previous_instruction, previous_position);
(false, self.current_register, self.current_register - 1)
Operation::Close => {
return Err(ParseError::ExpectedExpression {
found: self.previous_token.to_owned(),
position: self.previous_position,
});
}
_ => (true, false, previous_instruction.destination()),
}
};
let mut instruction = match operator.kind() {
TokenKind::Bang => Instruction::not(destination, from_register),
TokenKind::Minus => Instruction::negate(destination, from_register),
TokenKind::Bang => Instruction::not(self.current_register, argument),
TokenKind::Minus => Instruction::negate(self.current_register, argument),
_ => {
return Err(ParseError::ExpectedTokenMultiple {
expected: &[TokenKind::Bang, TokenKind::Minus],
@ -364,6 +361,10 @@ impl<'src> Parser<'src> {
instruction.set_first_argument_to_constant();
}
if push_back {
self.emit_instruction(previous_instruction, previous_position);
}
self.emit_instruction(instruction, operator_position);
Ok(())

4
dust-lang/src/parser/tests.rs
View File

@ -10,8 +10,8 @@ fn not() {
parse(source),
Ok(Chunk::with_data(
vec![
(Instruction::load_boolean(0, true, true), Span(1, 5)),
(Instruction::not(0, 0), Span(1, 5)),
(Instruction::load_boolean(0, true, false), Span(1, 5)),
(Instruction::not(1, 0), Span(0, 1)),
],
vec![],
vec![]