Binary Expression
A binary expression is an operation with a left- and right-hand argument. There are 3 types of binary expressions:
- Comparison
- Arithmetic
- Logical
The left- and right-hand side of == and != must be a number or boolean. The left- and right-hand side of <, >, <=, and >= must be a number.
The left- and right-hand side of an arithmetic binary expression must be a number.
The left- and right-hand side of a logical binary expression must be a boolean.
The logical operators short-circuit. If the left-hand side of and is false, the right hand side is not evaluated. If the left-hand side of or is true, the right hand side is not evaluated.
Structure
ComparisonOp = '==' | '!=' | '<' | '>' | '<=' | '>='
ArithmeticOp = '+' | '-' | '*' | '/' | '%' | '^'
LogicalOp = 'and' | 'or'
BinaryOp = ComparisonOp | ArithmeticOp | LogicalOp
BinaryExpr = Expression BinaryOp Expression
Example
5 + 10
true or false
61 < 162
(2 * 3) == 6
true and fn()