diff options
Diffstat (limited to 'users/tazjin/rlox/src/bytecode/compiler.rs')
-rw-r--r-- | users/tazjin/rlox/src/bytecode/compiler.rs | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/users/tazjin/rlox/src/bytecode/compiler.rs b/users/tazjin/rlox/src/bytecode/compiler.rs index 63f34fad3ea7..95b111dba824 100644 --- a/users/tazjin/rlox/src/bytecode/compiler.rs +++ b/users/tazjin/rlox/src/bytecode/compiler.rs @@ -1,9 +1,12 @@ -use super::chunk::{self, Chunk}; +use super::chunk::Chunk; use super::errors::{Error, ErrorKind, LoxResult}; use super::opcode::OpCode; use super::value::Value; use crate::scanner::{self, Token, TokenKind}; +#[cfg(feature = "disassemble")] +use super::chunk; + struct Compiler<T: Iterator<Item = Token>> { tokens: T, chunk: Chunk, @@ -101,6 +104,18 @@ fn rule_for<T: Iterator<Item = Token>>(token: &TokenKind) -> ParseRule<T> { ParseRule::new(Some(Compiler::number), None, Precedence::None) } + TokenKind::True => { + ParseRule::new(Some(Compiler::literal), None, Precedence::None) + } + + TokenKind::False => { + ParseRule::new(Some(Compiler::literal), None, Precedence::None) + } + + TokenKind::Nil => { + ParseRule::new(Some(Compiler::literal), None, Precedence::None) + } + _ => ParseRule::new(None, None, Precedence::None), } } @@ -180,6 +195,17 @@ impl<T: Iterator<Item = Token>> Compiler<T> { Ok(()) } + fn literal(&mut self) -> LoxResult<()> { + match self.previous().kind { + TokenKind::Nil => self.emit_op(OpCode::OpNil), + TokenKind::True => self.emit_op(OpCode::OpTrue), + TokenKind::False => self.emit_op(OpCode::OpFalse), + _ => unreachable!("only called for literal value tokens"), + } + + Ok(()) + } + fn parse_precedence(&mut self, precedence: Precedence) -> LoxResult<()> { self.advance(); let rule: ParseRule<T> = rule_for(&self.previous().kind); @@ -206,7 +232,7 @@ impl<T: Iterator<Item = Token>> Compiler<T> { } fn consume(&mut self, expected: &TokenKind, err: ErrorKind) { - if (self.current().kind == *expected) { + if self.current().kind == *expected { self.advance(); return; } |