28 lines
1.0 KiB
Rust
28 lines
1.0 KiB
Rust
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use crate::parser::{NyashParser, ParseError};
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use crate::parser::common::ParserUtils;
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use crate::tokenizer::TokenType;
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use crate::ast::{ASTNode, BinaryOperator, Span};
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impl NyashParser {
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pub(crate) fn expr_parse_shift(&mut self) -> Result<ASTNode, ParseError> {
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let mut expr = self.expr_parse_factor()?;
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loop {
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if self.match_token(&TokenType::ShiftLeft) {
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self.advance();
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let rhs = self.expr_parse_factor()?;
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expr = ASTNode::BinaryOp { operator: BinaryOperator::Shl, left: Box::new(expr), right: Box::new(rhs), span: Span::unknown() };
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continue;
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}
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if self.match_token(&TokenType::ShiftRight) {
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self.advance();
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let rhs = self.expr_parse_factor()?;
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expr = ASTNode::BinaryOp { operator: BinaryOperator::Shr, left: Box::new(expr), right: Box::new(rhs), span: Span::unknown() };
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continue;
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}
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break;
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}
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Ok(expr)
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}
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}
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