Unary (not, -)

Unary operators apply to single operands with the highest precedence among operators. The not operator performs logical negation, while the minus operator performs arithmetic negation.

Unary            = [ "not" | "-" ] Primary ;

Examples:

not isValid
-balance
not user.isActive

Notes

• Operator precedence follows mathematical conventions
• The is operator performs type checking
• Logical operators (and, or, not) use words, not symbols
• Chaining comparisons (e.g., a < b < c) is not supported