maurice/snix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

feat(tazjin/rlox): Implement equality operator

Browse source 
Change-Id: I5587a11646e228c5af4dc7ca6da026bb4a2592a6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2574
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI
This commit is contained in:
Vincent Ambo 2021-02-28 15:57:08 +02:00 • committed by tazjin
parent 93c30b339c
commit c58fe2093e
4 changed files with 50 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

16
users/tazjin/rlox/src/bytecode/compiler.rs
View file

@ -120,6 +120,14 @@ fn rule_for<T: Iterator<Item = Token>>(token: &TokenKind) -> ParseRule<T> {
ParseRule::new(Some(Compiler::unary), None, Precedence::None)
}
TokenKind::BangEqual => {
ParseRule::new(None, Some(Compiler::binary), Precedence::Equality)
}
TokenKind::EqualEqual => {
ParseRule::new(None, Some(Compiler::binary), Precedence::Equality)
}
_ => ParseRule::new(None, None, Precedence::None),
}
}
@ -194,6 +202,14 @@ impl<T: Iterator<Item = Token>> Compiler<T> {
TokenKind::Plus => self.emit_op(OpCode::OpAdd),
TokenKind::Star => self.emit_op(OpCode::OpMultiply),
TokenKind::Slash => self.emit_op(OpCode::OpDivide),
TokenKind::BangEqual => {
self.emit_op(OpCode::OpEqual);
self.emit_op(OpCode::OpNot);
}
TokenKind::EqualEqual => self.emit_op(OpCode::OpEqual),
_ => unreachable!("only called for binary operator tokens"),
}