Comments (1)
The =
operator is currently not supported.
You could implement it yourself and do a PR. This means adapting the parser class, creating an AssignmentExpression
class and adding an evalAssignment
method in the ExpressionEvaluator
.
Alternatively, you could use a set
method instead of the =
operator. So, if you would have an expression like x["something"] = 'hello'
, write it as x.set("something", 'hello')
instead. This will be parsed by the default parser. You would only need to create a custom evaluator that extends the default ExpressionEvaluator
and overrides the evalMemberExpression
. Something like this:
class MyEvaluator extends ExpressionEvaluator {
const MyEvaluator();
@override
evalMemberExpression(MemberExpression expression, Map<String, dynamic> context) {
var object = eval(expression.object, context).toJson();
if (object is Map&&expression.property.name=='set') {
return (key, value) => object[key] = value;
}
return super.evalMemberExpression(expression, context);
}
}
from expressions.
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from expressions.