37 lines
1.2 KiB
Rust
37 lines
1.2 KiB
Rust
use crate::ast::{ASTNode, BinaryOperator, Span};
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use crate::parser::common::ParserUtils;
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use crate::parser::{NyashParser, ParseError};
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use crate::tokenizer::TokenType;
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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 {
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operator: BinaryOperator::Shl,
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left: Box::new(expr),
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right: Box::new(rhs),
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span: Span::unknown(),
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};
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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 {
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operator: BinaryOperator::Shr,
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left: Box::new(expr),
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right: Box::new(rhs),
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span: Span::unknown(),
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};
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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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