[−][src]Struct phreak_engine::condition::ConditionBuilder

pub struct ConditionBuilder { /* fields omitted */ }

The ConditionBuilder is a helper to create Conditions.

Examples

We create a rule for the presence of a thing that is green and not small, and the abscence of an other thing, which is blue and large. Both condition must apply before this rule matches.


let mut conditions: Vec<Condition> = Vec::new();
let mut subconditions: Vec<Condition> = Vec::new();

let condition =
    ConditionBuilder::new(String::from("car"))
        // default is positive()
        .variable_field1(String::from("a"))
        .const_field2(String::from("is"))
        .const_field3(String::from("green"))
        .build();
conditions.push(condition);

let condition =
    ConditionBuilder::new(String::from("car"))
        .negative(String::from("car"))
        .variable_field1(String::from("a"))
        .const_field2(String::from("is"))
        .const_field3(String::from("small"))
        .build();
conditions.push(condition);

let subcondition =
    ConditionBuilder::new(String::from("car"))
        .variable_field1(String::from("b"))
        .const_field2(String::from("is"))
        .const_field3(String::from("blue"))
        .build();
subconditions.push(subcondition);

let subcondition =
    ConditionBuilder::new(String::from("car"))
        .variable_field1(String::from("b"))
        .const_field2(String::from("is"))
        .const_field3(String::from("large"))
        .build();
subconditions.push(subcondition);

let condition =
    ConditionBuilder::new(String::from("car"))
        .ncc(subconditions)
        .build();
conditions.push(condition);