unirule is a logical expression parser & evaluation tool written in Go.
a logical expression is composed of a couple of operands, which should always be a valid boolean value,(either true or false), as well as logical operator: &, |, !, which concat those operands. pairs of parentheses ( and ) are also valid.
usage:
expr := grammar.Parse("(1|!2) &3& !4& 5 & !（!6|7|8)")
eval := &interpreter.EvalVisitor{
Data: map[string]bool{
"1": true,
"2": true,
"3": true,
"4": false,
"5": true,
"6": false,
"7": false,
"8": false,
},
}
expr.Accept(eval)
assert.True(eval.Result() == false)