fix(parser): add unary operators to both expressions and statements.

fuse-lang · Mar 5, 2024 · 1f3b7ef · 1f3b7ef
1 parent dac23a2
commit 1f3b7ef
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diff --git a/crates/fuse-parser/src/parsers/expressions.rs b/crates/fuse-parser/src/parsers/expressions.rs
@@ -38,6 +38,11 @@ impl<'a> Parser<'a> {
                 .map(|id| self.ast.identifier_expression(id)),
             TokenKind::Function | TokenKind::Fn => self.parse_function_expression(),
             TokenKind::If => self.parse_if_expression(),
+
+            TokenKind::Not | TokenKind::Plus | TokenKind::Minus => {
+                self.parse_unary_operator_expression()
+            }
+
             _ => Err(Self::unexpected_error(self.cur_token())),
         }
     }

diff --git a/crates/fuse-parser/src/parsers/statements.rs b/crates/fuse-parser/src/parsers/statements.rs
@@ -62,6 +62,7 @@ impl<'a> Parser<'a> {
                 .parse_expression()
                 .map(|expr| self.ast.expression_statement(expr)),
 
+            // Short circuit the unary operators to prevent extra checks.
             TokenKind::Not | TokenKind::Plus | TokenKind::Minus => self
                 .parse_unary_operator_expression()
                 .map(|expr| self.ast.expression_statement(expr)),