A GoLang library for simple expression evaluation.
expr.Eval("true && true") # true
expr.Eval("2+3") # 5
expr.Eval("1+3>3") # true
expr.Eval("('fo'!='bar')&&(2!=3)") # true
Supported logical operations are && and ||.
- On text,
"true"or'true'(case insensitive) istrue, elsefalse - On numbers greater zero is
true, elsefalse
Supported comparisons are ==, !=, <, >, <= or >=.
While equal and not equal directly uses the value. Greater(equal) and smaller(equal) will behave different:
- On boolean a
0and1is used (true>0=true,false>0=false). - On text the length is used (
"hello">"hey"=true).
Supported arithmetics are +, -, *, / and %.
- On boolean a
0and1is used (true+0=1,false+0=0). - On text the length is used (
"foo"+"bar"=6).
Context can be used to group a part of the expression to prioritize the evaluation.