From d821331fa26c9d6c6f1988871b699c3f5cc88a84 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emmanuel=20Beno=C3=AEt?= <tseeker@nocternity.net>
Date: Sat, 31 Dec 2022 15:44:26 +0100
Subject: [PATCH] Parser - Variable references in expressions
---
src/parser.rs | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/parser.rs b/src/parser.rs
index 76e5cca..5c71870 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -214,6 +214,7 @@ impl Parser {
/// ```
/// primary := "(" expression ")"
/// primary := FALSE | TRUE | NIL | STRING | NUMBER
+ /// primary := IDENTIFIER
/// ```
fn parse_primary(&mut self) -> Result<ast::ExprNode, ParserError> {
if self.expect(&[TokenType::LeftParen]).is_some() {
@@ -231,6 +232,9 @@ impl Parser {
TokenType::Number(_) | &TokenType::String(_) => Ok(ast::ExprNode::Litteral {
value: self.advance().clone(),
}),
+ TokenType::Identifier(_) => Ok(ast::ExprNode::Variable {
+ name: self.advance().clone(),
+ }),
_ => Err(ParserError::new(self.peek(), "expected expression")),
}
}