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BoxBiPredicate

qubit_function::predicates::bi_predicate

Struct BoxBiPredicate 

Source 
pub struct BoxBiPredicate<T, U> { /* private fields */ }
Expand description

A Box-based bi-predicate with single ownership.

This type is suitable for one-time use scenarios where the bi-predicate does not need to be cloned or shared. Composition methods consume self, reflecting the single-ownership model.

§Examples

use qubit_function::{BiPredicate, BoxBiPredicate};

let pred = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
assert!(pred.test(&5, &3));

// Chaining consumes the bi-predicate
let combined = pred.and(BoxBiPredicate::new(|x, y| x > y));
assert!(combined.test(&10, &5));

§Author

Haixing Hu

Implementations§

Source§

impl<T, U> BoxBiPredicate<T, U>

Source

pub fn new<F>(f: F) -> Self
where F: Fn(&T, &U) -> bool + 'static,

Creates a new bi-predicate.

Wraps the provided closure in the appropriate smart pointer type for this bi-predicate implementation.

Examples found in repository?
examples/predicates/always_bi_predicate_demo.rs (line 94)
16fn main() {
17    println!("=== BoxBiPredicate always_true/always_false Demo ===\n");
18
19    // BoxBiPredicate::always_true
20    let always_true: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_true();
21    println!("BoxBiPredicate::always_true():");
22    println!("  test(&42, &10): {}", always_true.test(&42, &10));
23    println!("  test(&-1, &5): {}", always_true.test(&-1, &5));
24    println!("  test(&0, &0): {}", always_true.test(&0, &0));
25    println!("  name: {:?}", always_true.name());
26
27    // BoxBiPredicate::always_false
28    let always_false: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_false();
29    println!("\nBoxBiPredicate::always_false():");
30    println!("  test(&42, &10): {}", always_false.test(&42, &10));
31    println!("  test(&-1, &5): {}", always_false.test(&-1, &5));
32    println!("  test(&0, &0): {}", always_false.test(&0, &0));
33    println!("  name: {:?}", always_false.name());
34
35    println!("\n=== RcBiPredicate always_true/always_false Demo ===\n");
36
37    // RcBiPredicate::always_true
38    let rc_always_true: RcBiPredicate<String, i32> = RcBiPredicate::always_true();
39    println!("RcBiPredicate::always_true():");
40    println!(
41        "  test(&\"hello\", &5): {}",
42        rc_always_true.test(&"hello".to_string(), &5)
43    );
44    println!(
45        "  test(&\"world\", &-3): {}",
46        rc_always_true.test(&"world".to_string(), &-3)
47    );
48    println!("  name: {:?}", rc_always_true.name());
49
50    // RcBiPredicate::always_false
51    let rc_always_false: RcBiPredicate<String, i32> = RcBiPredicate::always_false();
52    println!("\nRcBiPredicate::always_false():");
53    println!(
54        "  test(&\"hello\", &5): {}",
55        rc_always_false.test(&"hello".to_string(), &5)
56    );
57    println!(
58        "  test(&\"world\", &-3): {}",
59        rc_always_false.test(&"world".to_string(), &-3)
60    );
61    println!("  name: {:?}", rc_always_false.name());
62
63    // Can be cloned and reused
64    let rc_clone = rc_always_true.clone();
65    println!("\nAfter cloning, still usable:");
66    println!(
67        "  Original: test(&\"test\", &1): {}",
68        rc_always_true.test(&"test".to_string(), &1)
69    );
70    println!(
71        "  Clone: test(&\"test\", &2): {}",
72        rc_clone.test(&"test".to_string(), &2)
73    );
74
75    println!("\n=== ArcBiPredicate always_true/always_false Demo ===\n");
76
77    // ArcBiPredicate::always_true
78    let arc_always_true: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_true();
79    println!("ArcBiPredicate::always_true():");
80    println!("  test(&100, &50): {}", arc_always_true.test(&100, &50));
81    println!("  test(&-100, &25): {}", arc_always_true.test(&-100, &25));
82    println!("  name: {:?}", arc_always_true.name());
83
84    // ArcBiPredicate::always_false
85    let arc_always_false: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_false();
86    println!("\nArcBiPredicate::always_false():");
87    println!("  test(&100, &50): {}", arc_always_false.test(&100, &50));
88    println!("  test(&-100, &25): {}", arc_always_false.test(&-100, &25));
89    println!("  name: {:?}", arc_always_false.name());
90
91    println!("\n=== Combining with other bi-predicates ===\n");
92
93    // Combining with always_true (AND)
94    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
95    let combined_and_true = sum_positive.and(BoxBiPredicate::always_true());
96    println!("sum_positive AND always_true:");
97    println!(
98        "  test(&5, &3): {} (equivalent to sum_positive)",
99        combined_and_true.test(&5, &3)
100    );
101    println!(
102        "  test(&-3, &-5): {} (equivalent to sum_positive)",
103        combined_and_true.test(&-3, &-5)
104    );
105
106    // Combining with always_false (AND)
107    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
108    let combined_and_false = sum_positive.and(BoxBiPredicate::always_false());
109    println!("\nsum_positive AND always_false:");
110    println!(
111        "  test(&5, &3): {} (always false)",
112        combined_and_false.test(&5, &3)
113    );
114    println!(
115        "  test(&-3, &-5): {} (always false)",
116        combined_and_false.test(&-3, &-5)
117    );
118
119    // Combining with always_true (OR)
120    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
121    let combined_or_true = sum_positive.or(BoxBiPredicate::always_true());
122    println!("\nsum_positive OR always_true:");
123    println!(
124        "  test(&5, &3): {} (always true)",
125        combined_or_true.test(&5, &3)
126    );
127    println!(
128        "  test(&-3, &-5): {} (always true)",
129        combined_or_true.test(&-3, &-5)
130    );
131
132    // Combining with always_false (OR)
133    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
134    let combined_or_false = sum_positive.or(BoxBiPredicate::always_false());
135    println!("\nsum_positive OR always_false:");
136    println!(
137        "  test(&5, &3): {} (equivalent to sum_positive)",
138        combined_or_false.test(&5, &3)
139    );
140    println!(
141        "  test(&-3, &-5): {} (equivalent to sum_positive)",
142        combined_or_false.test(&-3, &-5)
143    );
144
145    println!("\n=== Practical scenarios: Default pass/reject filters ===\n");
146
147    // Scenario 1: Default pass-all filter
148    let pairs = vec![(1, 2), (3, 4), (5, 6)];
149    let pass_all = BoxBiPredicate::<i32, i32>::always_true();
150    let closure = pass_all.into_fn();
151    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
152    println!("Default pass all elements: {:?} -> {:?}", pairs, filtered);
153
154    // Scenario 2: Default reject-all filter
155    let pairs = vec![(1, 2), (3, 4), (5, 6)];
156    let reject_all = BoxBiPredicate::<i32, i32>::always_false();
157    let closure = reject_all.into_fn();
158    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
159    println!("Default reject all elements: {:?} -> {:?}", pairs, filtered);
160
161    // Scenario 3: Configurable filter
162    fn configurable_filter(enable_filter: bool) -> BoxBiPredicate<i32, i32> {
163        if enable_filter {
164            BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 5)
165        } else {
166            BoxBiPredicate::always_true()
167        }
168    }
169
170    let pairs = vec![(1, 2), (3, 4), (5, 6)];
171
172    let filter_enabled = configurable_filter(true);
173    let closure = filter_enabled.into_fn();
174    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
175    println!("\nFilter enabled: {:?} -> {:?}", pairs, filtered);
176
177    let filter_disabled = configurable_filter(false);
178    let closure = filter_disabled.into_fn();
179    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
180    println!("Filter disabled: {:?} -> {:?}", pairs, filtered);
181}
Source

pub fn new_with_name<F>(name: &str, f: F) -> Self
where F: Fn(&T, &U) -> bool + 'static,

Creates a new named bi-predicate.

Wraps the provided closure and assigns it a name, which is useful for debugging and logging purposes.

Source

pub fn new_with_optional_name<F>(f: F, name: Option<String>) -> Self
where F: Fn(&T, &U) -> bool + 'static,

Creates a new named bi-predicate with an optional name.

Wraps the provided closure and assigns it an optional name.

Source

pub fn name(&self) -> Option<&str>

Gets the name of this bi-predicate.

§Returns

Returns Some(&str) if a name was set, None otherwise.

Examples found in repository?
examples/predicates/always_bi_predicate_demo.rs (line 25)
16fn main() {
17    println!("=== BoxBiPredicate always_true/always_false Demo ===\n");
18
19    // BoxBiPredicate::always_true
20    let always_true: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_true();
21    println!("BoxBiPredicate::always_true():");
22    println!("  test(&42, &10): {}", always_true.test(&42, &10));
23    println!("  test(&-1, &5): {}", always_true.test(&-1, &5));
24    println!("  test(&0, &0): {}", always_true.test(&0, &0));
25    println!("  name: {:?}", always_true.name());
26
27    // BoxBiPredicate::always_false
28    let always_false: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_false();
29    println!("\nBoxBiPredicate::always_false():");
30    println!("  test(&42, &10): {}", always_false.test(&42, &10));
31    println!("  test(&-1, &5): {}", always_false.test(&-1, &5));
32    println!("  test(&0, &0): {}", always_false.test(&0, &0));
33    println!("  name: {:?}", always_false.name());
34
35    println!("\n=== RcBiPredicate always_true/always_false Demo ===\n");
36
37    // RcBiPredicate::always_true
38    let rc_always_true: RcBiPredicate<String, i32> = RcBiPredicate::always_true();
39    println!("RcBiPredicate::always_true():");
40    println!(
41        "  test(&\"hello\", &5): {}",
42        rc_always_true.test(&"hello".to_string(), &5)
43    );
44    println!(
45        "  test(&\"world\", &-3): {}",
46        rc_always_true.test(&"world".to_string(), &-3)
47    );
48    println!("  name: {:?}", rc_always_true.name());
49
50    // RcBiPredicate::always_false
51    let rc_always_false: RcBiPredicate<String, i32> = RcBiPredicate::always_false();
52    println!("\nRcBiPredicate::always_false():");
53    println!(
54        "  test(&\"hello\", &5): {}",
55        rc_always_false.test(&"hello".to_string(), &5)
56    );
57    println!(
58        "  test(&\"world\", &-3): {}",
59        rc_always_false.test(&"world".to_string(), &-3)
60    );
61    println!("  name: {:?}", rc_always_false.name());
62
63    // Can be cloned and reused
64    let rc_clone = rc_always_true.clone();
65    println!("\nAfter cloning, still usable:");
66    println!(
67        "  Original: test(&\"test\", &1): {}",
68        rc_always_true.test(&"test".to_string(), &1)
69    );
70    println!(
71        "  Clone: test(&\"test\", &2): {}",
72        rc_clone.test(&"test".to_string(), &2)
73    );
74
75    println!("\n=== ArcBiPredicate always_true/always_false Demo ===\n");
76
77    // ArcBiPredicate::always_true
78    let arc_always_true: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_true();
79    println!("ArcBiPredicate::always_true():");
80    println!("  test(&100, &50): {}", arc_always_true.test(&100, &50));
81    println!("  test(&-100, &25): {}", arc_always_true.test(&-100, &25));
82    println!("  name: {:?}", arc_always_true.name());
83
84    // ArcBiPredicate::always_false
85    let arc_always_false: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_false();
86    println!("\nArcBiPredicate::always_false():");
87    println!("  test(&100, &50): {}", arc_always_false.test(&100, &50));
88    println!("  test(&-100, &25): {}", arc_always_false.test(&-100, &25));
89    println!("  name: {:?}", arc_always_false.name());
90
91    println!("\n=== Combining with other bi-predicates ===\n");
92
93    // Combining with always_true (AND)
94    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
95    let combined_and_true = sum_positive.and(BoxBiPredicate::always_true());
96    println!("sum_positive AND always_true:");
97    println!(
98        "  test(&5, &3): {} (equivalent to sum_positive)",
99        combined_and_true.test(&5, &3)
100    );
101    println!(
102        "  test(&-3, &-5): {} (equivalent to sum_positive)",
103        combined_and_true.test(&-3, &-5)
104    );
105
106    // Combining with always_false (AND)
107    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
108    let combined_and_false = sum_positive.and(BoxBiPredicate::always_false());
109    println!("\nsum_positive AND always_false:");
110    println!(
111        "  test(&5, &3): {} (always false)",
112        combined_and_false.test(&5, &3)
113    );
114    println!(
115        "  test(&-3, &-5): {} (always false)",
116        combined_and_false.test(&-3, &-5)
117    );
118
119    // Combining with always_true (OR)
120    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
121    let combined_or_true = sum_positive.or(BoxBiPredicate::always_true());
122    println!("\nsum_positive OR always_true:");
123    println!(
124        "  test(&5, &3): {} (always true)",
125        combined_or_true.test(&5, &3)
126    );
127    println!(
128        "  test(&-3, &-5): {} (always true)",
129        combined_or_true.test(&-3, &-5)
130    );
131
132    // Combining with always_false (OR)
133    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
134    let combined_or_false = sum_positive.or(BoxBiPredicate::always_false());
135    println!("\nsum_positive OR always_false:");
136    println!(
137        "  test(&5, &3): {} (equivalent to sum_positive)",
138        combined_or_false.test(&5, &3)
139    );
140    println!(
141        "  test(&-3, &-5): {} (equivalent to sum_positive)",
142        combined_or_false.test(&-3, &-5)
143    );
144
145    println!("\n=== Practical scenarios: Default pass/reject filters ===\n");
146
147    // Scenario 1: Default pass-all filter
148    let pairs = vec![(1, 2), (3, 4), (5, 6)];
149    let pass_all = BoxBiPredicate::<i32, i32>::always_true();
150    let closure = pass_all.into_fn();
151    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
152    println!("Default pass all elements: {:?} -> {:?}", pairs, filtered);
153
154    // Scenario 2: Default reject-all filter
155    let pairs = vec![(1, 2), (3, 4), (5, 6)];
156    let reject_all = BoxBiPredicate::<i32, i32>::always_false();
157    let closure = reject_all.into_fn();
158    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
159    println!("Default reject all elements: {:?} -> {:?}", pairs, filtered);
160
161    // Scenario 3: Configurable filter
162    fn configurable_filter(enable_filter: bool) -> BoxBiPredicate<i32, i32> {
163        if enable_filter {
164            BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 5)
165        } else {
166            BoxBiPredicate::always_true()
167        }
168    }
169
170    let pairs = vec![(1, 2), (3, 4), (5, 6)];
171
172    let filter_enabled = configurable_filter(true);
173    let closure = filter_enabled.into_fn();
174    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
175    println!("\nFilter enabled: {:?} -> {:?}", pairs, filtered);
176
177    let filter_disabled = configurable_filter(false);
178    let closure = filter_disabled.into_fn();
179    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
180    println!("Filter disabled: {:?} -> {:?}", pairs, filtered);
181}
Source

pub fn set_name(&mut self, name: &str)

Sets the name of this bi-predicate.

§Parameters
  • name - The name to set for this bi-predicate
Source

pub fn clear_name(&mut self)

Clears the name of this bi-predicate.

Source

pub fn always_true() -> Self

Creates a bi-predicate that always returns true.

§Returns

A new BoxBiPredicate that always returns true.

Examples found in repository?
examples/predicates/always_bi_predicate_demo.rs (line 20)
16fn main() {
17    println!("=== BoxBiPredicate always_true/always_false Demo ===\n");
18
19    // BoxBiPredicate::always_true
20    let always_true: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_true();
21    println!("BoxBiPredicate::always_true():");
22    println!("  test(&42, &10): {}", always_true.test(&42, &10));
23    println!("  test(&-1, &5): {}", always_true.test(&-1, &5));
24    println!("  test(&0, &0): {}", always_true.test(&0, &0));
25    println!("  name: {:?}", always_true.name());
26
27    // BoxBiPredicate::always_false
28    let always_false: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_false();
29    println!("\nBoxBiPredicate::always_false():");
30    println!("  test(&42, &10): {}", always_false.test(&42, &10));
31    println!("  test(&-1, &5): {}", always_false.test(&-1, &5));
32    println!("  test(&0, &0): {}", always_false.test(&0, &0));
33    println!("  name: {:?}", always_false.name());
34
35    println!("\n=== RcBiPredicate always_true/always_false Demo ===\n");
36
37    // RcBiPredicate::always_true
38    let rc_always_true: RcBiPredicate<String, i32> = RcBiPredicate::always_true();
39    println!("RcBiPredicate::always_true():");
40    println!(
41        "  test(&\"hello\", &5): {}",
42        rc_always_true.test(&"hello".to_string(), &5)
43    );
44    println!(
45        "  test(&\"world\", &-3): {}",
46        rc_always_true.test(&"world".to_string(), &-3)
47    );
48    println!("  name: {:?}", rc_always_true.name());
49
50    // RcBiPredicate::always_false
51    let rc_always_false: RcBiPredicate<String, i32> = RcBiPredicate::always_false();
52    println!("\nRcBiPredicate::always_false():");
53    println!(
54        "  test(&\"hello\", &5): {}",
55        rc_always_false.test(&"hello".to_string(), &5)
56    );
57    println!(
58        "  test(&\"world\", &-3): {}",
59        rc_always_false.test(&"world".to_string(), &-3)
60    );
61    println!("  name: {:?}", rc_always_false.name());
62
63    // Can be cloned and reused
64    let rc_clone = rc_always_true.clone();
65    println!("\nAfter cloning, still usable:");
66    println!(
67        "  Original: test(&\"test\", &1): {}",
68        rc_always_true.test(&"test".to_string(), &1)
69    );
70    println!(
71        "  Clone: test(&\"test\", &2): {}",
72        rc_clone.test(&"test".to_string(), &2)
73    );
74
75    println!("\n=== ArcBiPredicate always_true/always_false Demo ===\n");
76
77    // ArcBiPredicate::always_true
78    let arc_always_true: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_true();
79    println!("ArcBiPredicate::always_true():");
80    println!("  test(&100, &50): {}", arc_always_true.test(&100, &50));
81    println!("  test(&-100, &25): {}", arc_always_true.test(&-100, &25));
82    println!("  name: {:?}", arc_always_true.name());
83
84    // ArcBiPredicate::always_false
85    let arc_always_false: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_false();
86    println!("\nArcBiPredicate::always_false():");
87    println!("  test(&100, &50): {}", arc_always_false.test(&100, &50));
88    println!("  test(&-100, &25): {}", arc_always_false.test(&-100, &25));
89    println!("  name: {:?}", arc_always_false.name());
90
91    println!("\n=== Combining with other bi-predicates ===\n");
92
93    // Combining with always_true (AND)
94    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
95    let combined_and_true = sum_positive.and(BoxBiPredicate::always_true());
96    println!("sum_positive AND always_true:");
97    println!(
98        "  test(&5, &3): {} (equivalent to sum_positive)",
99        combined_and_true.test(&5, &3)
100    );
101    println!(
102        "  test(&-3, &-5): {} (equivalent to sum_positive)",
103        combined_and_true.test(&-3, &-5)
104    );
105
106    // Combining with always_false (AND)
107    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
108    let combined_and_false = sum_positive.and(BoxBiPredicate::always_false());
109    println!("\nsum_positive AND always_false:");
110    println!(
111        "  test(&5, &3): {} (always false)",
112        combined_and_false.test(&5, &3)
113    );
114    println!(
115        "  test(&-3, &-5): {} (always false)",
116        combined_and_false.test(&-3, &-5)
117    );
118
119    // Combining with always_true (OR)
120    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
121    let combined_or_true = sum_positive.or(BoxBiPredicate::always_true());
122    println!("\nsum_positive OR always_true:");
123    println!(
124        "  test(&5, &3): {} (always true)",
125        combined_or_true.test(&5, &3)
126    );
127    println!(
128        "  test(&-3, &-5): {} (always true)",
129        combined_or_true.test(&-3, &-5)
130    );
131
132    // Combining with always_false (OR)
133    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
134    let combined_or_false = sum_positive.or(BoxBiPredicate::always_false());
135    println!("\nsum_positive OR always_false:");
136    println!(
137        "  test(&5, &3): {} (equivalent to sum_positive)",
138        combined_or_false.test(&5, &3)
139    );
140    println!(
141        "  test(&-3, &-5): {} (equivalent to sum_positive)",
142        combined_or_false.test(&-3, &-5)
143    );
144
145    println!("\n=== Practical scenarios: Default pass/reject filters ===\n");
146
147    // Scenario 1: Default pass-all filter
148    let pairs = vec![(1, 2), (3, 4), (5, 6)];
149    let pass_all = BoxBiPredicate::<i32, i32>::always_true();
150    let closure = pass_all.into_fn();
151    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
152    println!("Default pass all elements: {:?} -> {:?}", pairs, filtered);
153
154    // Scenario 2: Default reject-all filter
155    let pairs = vec![(1, 2), (3, 4), (5, 6)];
156    let reject_all = BoxBiPredicate::<i32, i32>::always_false();
157    let closure = reject_all.into_fn();
158    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
159    println!("Default reject all elements: {:?} -> {:?}", pairs, filtered);
160
161    // Scenario 3: Configurable filter
162    fn configurable_filter(enable_filter: bool) -> BoxBiPredicate<i32, i32> {
163        if enable_filter {
164            BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 5)
165        } else {
166            BoxBiPredicate::always_true()
167        }
168    }
169
170    let pairs = vec![(1, 2), (3, 4), (5, 6)];
171
172    let filter_enabled = configurable_filter(true);
173    let closure = filter_enabled.into_fn();
174    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
175    println!("\nFilter enabled: {:?} -> {:?}", pairs, filtered);
176
177    let filter_disabled = configurable_filter(false);
178    let closure = filter_disabled.into_fn();
179    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
180    println!("Filter disabled: {:?} -> {:?}", pairs, filtered);
181}
Source

pub fn always_false() -> Self

Creates a bi-predicate that always returns false.

§Returns

A new BoxBiPredicate that always returns false.

Examples found in repository?
examples/predicates/always_bi_predicate_demo.rs (line 28)
16fn main() {
17    println!("=== BoxBiPredicate always_true/always_false Demo ===\n");
18
19    // BoxBiPredicate::always_true
20    let always_true: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_true();
21    println!("BoxBiPredicate::always_true():");
22    println!("  test(&42, &10): {}", always_true.test(&42, &10));
23    println!("  test(&-1, &5): {}", always_true.test(&-1, &5));
24    println!("  test(&0, &0): {}", always_true.test(&0, &0));
25    println!("  name: {:?}", always_true.name());
26
27    // BoxBiPredicate::always_false
28    let always_false: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_false();
29    println!("\nBoxBiPredicate::always_false():");
30    println!("  test(&42, &10): {}", always_false.test(&42, &10));
31    println!("  test(&-1, &5): {}", always_false.test(&-1, &5));
32    println!("  test(&0, &0): {}", always_false.test(&0, &0));
33    println!("  name: {:?}", always_false.name());
34
35    println!("\n=== RcBiPredicate always_true/always_false Demo ===\n");
36
37    // RcBiPredicate::always_true
38    let rc_always_true: RcBiPredicate<String, i32> = RcBiPredicate::always_true();
39    println!("RcBiPredicate::always_true():");
40    println!(
41        "  test(&\"hello\", &5): {}",
42        rc_always_true.test(&"hello".to_string(), &5)
43    );
44    println!(
45        "  test(&\"world\", &-3): {}",
46        rc_always_true.test(&"world".to_string(), &-3)
47    );
48    println!("  name: {:?}", rc_always_true.name());
49
50    // RcBiPredicate::always_false
51    let rc_always_false: RcBiPredicate<String, i32> = RcBiPredicate::always_false();
52    println!("\nRcBiPredicate::always_false():");
53    println!(
54        "  test(&\"hello\", &5): {}",
55        rc_always_false.test(&"hello".to_string(), &5)
56    );
57    println!(
58        "  test(&\"world\", &-3): {}",
59        rc_always_false.test(&"world".to_string(), &-3)
60    );
61    println!("  name: {:?}", rc_always_false.name());
62
63    // Can be cloned and reused
64    let rc_clone = rc_always_true.clone();
65    println!("\nAfter cloning, still usable:");
66    println!(
67        "  Original: test(&\"test\", &1): {}",
68        rc_always_true.test(&"test".to_string(), &1)
69    );
70    println!(
71        "  Clone: test(&\"test\", &2): {}",
72        rc_clone.test(&"test".to_string(), &2)
73    );
74
75    println!("\n=== ArcBiPredicate always_true/always_false Demo ===\n");
76
77    // ArcBiPredicate::always_true
78    let arc_always_true: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_true();
79    println!("ArcBiPredicate::always_true():");
80    println!("  test(&100, &50): {}", arc_always_true.test(&100, &50));
81    println!("  test(&-100, &25): {}", arc_always_true.test(&-100, &25));
82    println!("  name: {:?}", arc_always_true.name());
83
84    // ArcBiPredicate::always_false
85    let arc_always_false: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_false();
86    println!("\nArcBiPredicate::always_false():");
87    println!("  test(&100, &50): {}", arc_always_false.test(&100, &50));
88    println!("  test(&-100, &25): {}", arc_always_false.test(&-100, &25));
89    println!("  name: {:?}", arc_always_false.name());
90
91    println!("\n=== Combining with other bi-predicates ===\n");
92
93    // Combining with always_true (AND)
94    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
95    let combined_and_true = sum_positive.and(BoxBiPredicate::always_true());
96    println!("sum_positive AND always_true:");
97    println!(
98        "  test(&5, &3): {} (equivalent to sum_positive)",
99        combined_and_true.test(&5, &3)
100    );
101    println!(
102        "  test(&-3, &-5): {} (equivalent to sum_positive)",
103        combined_and_true.test(&-3, &-5)
104    );
105
106    // Combining with always_false (AND)
107    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
108    let combined_and_false = sum_positive.and(BoxBiPredicate::always_false());
109    println!("\nsum_positive AND always_false:");
110    println!(
111        "  test(&5, &3): {} (always false)",
112        combined_and_false.test(&5, &3)
113    );
114    println!(
115        "  test(&-3, &-5): {} (always false)",
116        combined_and_false.test(&-3, &-5)
117    );
118
119    // Combining with always_true (OR)
120    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
121    let combined_or_true = sum_positive.or(BoxBiPredicate::always_true());
122    println!("\nsum_positive OR always_true:");
123    println!(
124        "  test(&5, &3): {} (always true)",
125        combined_or_true.test(&5, &3)
126    );
127    println!(
128        "  test(&-3, &-5): {} (always true)",
129        combined_or_true.test(&-3, &-5)
130    );
131
132    // Combining with always_false (OR)
133    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
134    let combined_or_false = sum_positive.or(BoxBiPredicate::always_false());
135    println!("\nsum_positive OR always_false:");
136    println!(
137        "  test(&5, &3): {} (equivalent to sum_positive)",
138        combined_or_false.test(&5, &3)
139    );
140    println!(
141        "  test(&-3, &-5): {} (equivalent to sum_positive)",
142        combined_or_false.test(&-3, &-5)
143    );
144
145    println!("\n=== Practical scenarios: Default pass/reject filters ===\n");
146
147    // Scenario 1: Default pass-all filter
148    let pairs = vec![(1, 2), (3, 4), (5, 6)];
149    let pass_all = BoxBiPredicate::<i32, i32>::always_true();
150    let closure = pass_all.into_fn();
151    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
152    println!("Default pass all elements: {:?} -> {:?}", pairs, filtered);
153
154    // Scenario 2: Default reject-all filter
155    let pairs = vec![(1, 2), (3, 4), (5, 6)];
156    let reject_all = BoxBiPredicate::<i32, i32>::always_false();
157    let closure = reject_all.into_fn();
158    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
159    println!("Default reject all elements: {:?} -> {:?}", pairs, filtered);
160
161    // Scenario 3: Configurable filter
162    fn configurable_filter(enable_filter: bool) -> BoxBiPredicate<i32, i32> {
163        if enable_filter {
164            BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 5)
165        } else {
166            BoxBiPredicate::always_true()
167        }
168    }
169
170    let pairs = vec![(1, 2), (3, 4), (5, 6)];
171
172    let filter_enabled = configurable_filter(true);
173    let closure = filter_enabled.into_fn();
174    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
175    println!("\nFilter enabled: {:?} -> {:?}", pairs, filtered);
176
177    let filter_disabled = configurable_filter(false);
178    let closure = filter_disabled.into_fn();
179    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
180    println!("Filter disabled: {:?} -> {:?}", pairs, filtered);
181}
Source

pub fn and<P>(self, other: P) -> BoxBiPredicate<T, U>
where P: BiPredicate<T, U> + 'static, T: 'static, U: 'static,

Returns a bi-predicate that represents the logical AND of this bi-predicate and another.

This method consumes self due to single-ownership semantics.

§Parameters
  • other - The other bi-predicate to combine with.
§Returns

A new bi-predicate representing the logical AND.

Examples found in repository?
examples/predicates/always_bi_predicate_demo.rs (line 95)
16fn main() {
17    println!("=== BoxBiPredicate always_true/always_false Demo ===\n");
18
19    // BoxBiPredicate::always_true
20    let always_true: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_true();
21    println!("BoxBiPredicate::always_true():");
22    println!("  test(&42, &10): {}", always_true.test(&42, &10));
23    println!("  test(&-1, &5): {}", always_true.test(&-1, &5));
24    println!("  test(&0, &0): {}", always_true.test(&0, &0));
25    println!("  name: {:?}", always_true.name());
26
27    // BoxBiPredicate::always_false
28    let always_false: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_false();
29    println!("\nBoxBiPredicate::always_false():");
30    println!("  test(&42, &10): {}", always_false.test(&42, &10));
31    println!("  test(&-1, &5): {}", always_false.test(&-1, &5));
32    println!("  test(&0, &0): {}", always_false.test(&0, &0));
33    println!("  name: {:?}", always_false.name());
34
35    println!("\n=== RcBiPredicate always_true/always_false Demo ===\n");
36
37    // RcBiPredicate::always_true
38    let rc_always_true: RcBiPredicate<String, i32> = RcBiPredicate::always_true();
39    println!("RcBiPredicate::always_true():");
40    println!(
41        "  test(&\"hello\", &5): {}",
42        rc_always_true.test(&"hello".to_string(), &5)
43    );
44    println!(
45        "  test(&\"world\", &-3): {}",
46        rc_always_true.test(&"world".to_string(), &-3)
47    );
48    println!("  name: {:?}", rc_always_true.name());
49
50    // RcBiPredicate::always_false
51    let rc_always_false: RcBiPredicate<String, i32> = RcBiPredicate::always_false();
52    println!("\nRcBiPredicate::always_false():");
53    println!(
54        "  test(&\"hello\", &5): {}",
55        rc_always_false.test(&"hello".to_string(), &5)
56    );
57    println!(
58        "  test(&\"world\", &-3): {}",
59        rc_always_false.test(&"world".to_string(), &-3)
60    );
61    println!("  name: {:?}", rc_always_false.name());
62
63    // Can be cloned and reused
64    let rc_clone = rc_always_true.clone();
65    println!("\nAfter cloning, still usable:");
66    println!(
67        "  Original: test(&\"test\", &1): {}",
68        rc_always_true.test(&"test".to_string(), &1)
69    );
70    println!(
71        "  Clone: test(&\"test\", &2): {}",
72        rc_clone.test(&"test".to_string(), &2)
73    );
74
75    println!("\n=== ArcBiPredicate always_true/always_false Demo ===\n");
76
77    // ArcBiPredicate::always_true
78    let arc_always_true: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_true();
79    println!("ArcBiPredicate::always_true():");
80    println!("  test(&100, &50): {}", arc_always_true.test(&100, &50));
81    println!("  test(&-100, &25): {}", arc_always_true.test(&-100, &25));
82    println!("  name: {:?}", arc_always_true.name());
83
84    // ArcBiPredicate::always_false
85    let arc_always_false: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_false();
86    println!("\nArcBiPredicate::always_false():");
87    println!("  test(&100, &50): {}", arc_always_false.test(&100, &50));
88    println!("  test(&-100, &25): {}", arc_always_false.test(&-100, &25));
89    println!("  name: {:?}", arc_always_false.name());
90
91    println!("\n=== Combining with other bi-predicates ===\n");
92
93    // Combining with always_true (AND)
94    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
95    let combined_and_true = sum_positive.and(BoxBiPredicate::always_true());
96    println!("sum_positive AND always_true:");
97    println!(
98        "  test(&5, &3): {} (equivalent to sum_positive)",
99        combined_and_true.test(&5, &3)
100    );
101    println!(
102        "  test(&-3, &-5): {} (equivalent to sum_positive)",
103        combined_and_true.test(&-3, &-5)
104    );
105
106    // Combining with always_false (AND)
107    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
108    let combined_and_false = sum_positive.and(BoxBiPredicate::always_false());
109    println!("\nsum_positive AND always_false:");
110    println!(
111        "  test(&5, &3): {} (always false)",
112        combined_and_false.test(&5, &3)
113    );
114    println!(
115        "  test(&-3, &-5): {} (always false)",
116        combined_and_false.test(&-3, &-5)
117    );
118
119    // Combining with always_true (OR)
120    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
121    let combined_or_true = sum_positive.or(BoxBiPredicate::always_true());
122    println!("\nsum_positive OR always_true:");
123    println!(
124        "  test(&5, &3): {} (always true)",
125        combined_or_true.test(&5, &3)
126    );
127    println!(
128        "  test(&-3, &-5): {} (always true)",
129        combined_or_true.test(&-3, &-5)
130    );
131
132    // Combining with always_false (OR)
133    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
134    let combined_or_false = sum_positive.or(BoxBiPredicate::always_false());
135    println!("\nsum_positive OR always_false:");
136    println!(
137        "  test(&5, &3): {} (equivalent to sum_positive)",
138        combined_or_false.test(&5, &3)
139    );
140    println!(
141        "  test(&-3, &-5): {} (equivalent to sum_positive)",
142        combined_or_false.test(&-3, &-5)
143    );
144
145    println!("\n=== Practical scenarios: Default pass/reject filters ===\n");
146
147    // Scenario 1: Default pass-all filter
148    let pairs = vec![(1, 2), (3, 4), (5, 6)];
149    let pass_all = BoxBiPredicate::<i32, i32>::always_true();
150    let closure = pass_all.into_fn();
151    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
152    println!("Default pass all elements: {:?} -> {:?}", pairs, filtered);
153
154    // Scenario 2: Default reject-all filter
155    let pairs = vec![(1, 2), (3, 4), (5, 6)];
156    let reject_all = BoxBiPredicate::<i32, i32>::always_false();
157    let closure = reject_all.into_fn();
158    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
159    println!("Default reject all elements: {:?} -> {:?}", pairs, filtered);
160
161    // Scenario 3: Configurable filter
162    fn configurable_filter(enable_filter: bool) -> BoxBiPredicate<i32, i32> {
163        if enable_filter {
164            BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 5)
165        } else {
166            BoxBiPredicate::always_true()
167        }
168    }
169
170    let pairs = vec![(1, 2), (3, 4), (5, 6)];
171
172    let filter_enabled = configurable_filter(true);
173    let closure = filter_enabled.into_fn();
174    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
175    println!("\nFilter enabled: {:?} -> {:?}", pairs, filtered);
176
177    let filter_disabled = configurable_filter(false);
178    let closure = filter_disabled.into_fn();
179    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
180    println!("Filter disabled: {:?} -> {:?}", pairs, filtered);
181}
Source

pub fn or<P>(self, other: P) -> BoxBiPredicate<T, U>
where P: BiPredicate<T, U> + 'static, T: 'static, U: 'static,

Returns a bi-predicate that represents the logical OR of this bi-predicate and another.

This method consumes self due to single-ownership semantics.

§Parameters
  • other - The other bi-predicate to combine with.
§Returns

A new bi-predicate representing the logical OR.

Examples found in repository?
examples/predicates/always_bi_predicate_demo.rs (line 121)
16fn main() {
17    println!("=== BoxBiPredicate always_true/always_false Demo ===\n");
18
19    // BoxBiPredicate::always_true
20    let always_true: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_true();
21    println!("BoxBiPredicate::always_true():");
22    println!("  test(&42, &10): {}", always_true.test(&42, &10));
23    println!("  test(&-1, &5): {}", always_true.test(&-1, &5));
24    println!("  test(&0, &0): {}", always_true.test(&0, &0));
25    println!("  name: {:?}", always_true.name());
26
27    // BoxBiPredicate::always_false
28    let always_false: BoxBiPredicate<i32, i32> = BoxBiPredicate::always_false();
29    println!("\nBoxBiPredicate::always_false():");
30    println!("  test(&42, &10): {}", always_false.test(&42, &10));
31    println!("  test(&-1, &5): {}", always_false.test(&-1, &5));
32    println!("  test(&0, &0): {}", always_false.test(&0, &0));
33    println!("  name: {:?}", always_false.name());
34
35    println!("\n=== RcBiPredicate always_true/always_false Demo ===\n");
36
37    // RcBiPredicate::always_true
38    let rc_always_true: RcBiPredicate<String, i32> = RcBiPredicate::always_true();
39    println!("RcBiPredicate::always_true():");
40    println!(
41        "  test(&\"hello\", &5): {}",
42        rc_always_true.test(&"hello".to_string(), &5)
43    );
44    println!(
45        "  test(&\"world\", &-3): {}",
46        rc_always_true.test(&"world".to_string(), &-3)
47    );
48    println!("  name: {:?}", rc_always_true.name());
49
50    // RcBiPredicate::always_false
51    let rc_always_false: RcBiPredicate<String, i32> = RcBiPredicate::always_false();
52    println!("\nRcBiPredicate::always_false():");
53    println!(
54        "  test(&\"hello\", &5): {}",
55        rc_always_false.test(&"hello".to_string(), &5)
56    );
57    println!(
58        "  test(&\"world\", &-3): {}",
59        rc_always_false.test(&"world".to_string(), &-3)
60    );
61    println!("  name: {:?}", rc_always_false.name());
62
63    // Can be cloned and reused
64    let rc_clone = rc_always_true.clone();
65    println!("\nAfter cloning, still usable:");
66    println!(
67        "  Original: test(&\"test\", &1): {}",
68        rc_always_true.test(&"test".to_string(), &1)
69    );
70    println!(
71        "  Clone: test(&\"test\", &2): {}",
72        rc_clone.test(&"test".to_string(), &2)
73    );
74
75    println!("\n=== ArcBiPredicate always_true/always_false Demo ===\n");
76
77    // ArcBiPredicate::always_true
78    let arc_always_true: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_true();
79    println!("ArcBiPredicate::always_true():");
80    println!("  test(&100, &50): {}", arc_always_true.test(&100, &50));
81    println!("  test(&-100, &25): {}", arc_always_true.test(&-100, &25));
82    println!("  name: {:?}", arc_always_true.name());
83
84    // ArcBiPredicate::always_false
85    let arc_always_false: ArcBiPredicate<i32, i32> = ArcBiPredicate::always_false();
86    println!("\nArcBiPredicate::always_false():");
87    println!("  test(&100, &50): {}", arc_always_false.test(&100, &50));
88    println!("  test(&-100, &25): {}", arc_always_false.test(&-100, &25));
89    println!("  name: {:?}", arc_always_false.name());
90
91    println!("\n=== Combining with other bi-predicates ===\n");
92
93    // Combining with always_true (AND)
94    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
95    let combined_and_true = sum_positive.and(BoxBiPredicate::always_true());
96    println!("sum_positive AND always_true:");
97    println!(
98        "  test(&5, &3): {} (equivalent to sum_positive)",
99        combined_and_true.test(&5, &3)
100    );
101    println!(
102        "  test(&-3, &-5): {} (equivalent to sum_positive)",
103        combined_and_true.test(&-3, &-5)
104    );
105
106    // Combining with always_false (AND)
107    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
108    let combined_and_false = sum_positive.and(BoxBiPredicate::always_false());
109    println!("\nsum_positive AND always_false:");
110    println!(
111        "  test(&5, &3): {} (always false)",
112        combined_and_false.test(&5, &3)
113    );
114    println!(
115        "  test(&-3, &-5): {} (always false)",
116        combined_and_false.test(&-3, &-5)
117    );
118
119    // Combining with always_true (OR)
120    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
121    let combined_or_true = sum_positive.or(BoxBiPredicate::always_true());
122    println!("\nsum_positive OR always_true:");
123    println!(
124        "  test(&5, &3): {} (always true)",
125        combined_or_true.test(&5, &3)
126    );
127    println!(
128        "  test(&-3, &-5): {} (always true)",
129        combined_or_true.test(&-3, &-5)
130    );
131
132    // Combining with always_false (OR)
133    let sum_positive = BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
134    let combined_or_false = sum_positive.or(BoxBiPredicate::always_false());
135    println!("\nsum_positive OR always_false:");
136    println!(
137        "  test(&5, &3): {} (equivalent to sum_positive)",
138        combined_or_false.test(&5, &3)
139    );
140    println!(
141        "  test(&-3, &-5): {} (equivalent to sum_positive)",
142        combined_or_false.test(&-3, &-5)
143    );
144
145    println!("\n=== Practical scenarios: Default pass/reject filters ===\n");
146
147    // Scenario 1: Default pass-all filter
148    let pairs = vec![(1, 2), (3, 4), (5, 6)];
149    let pass_all = BoxBiPredicate::<i32, i32>::always_true();
150    let closure = pass_all.into_fn();
151    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
152    println!("Default pass all elements: {:?} -> {:?}", pairs, filtered);
153
154    // Scenario 2: Default reject-all filter
155    let pairs = vec![(1, 2), (3, 4), (5, 6)];
156    let reject_all = BoxBiPredicate::<i32, i32>::always_false();
157    let closure = reject_all.into_fn();
158    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
159    println!("Default reject all elements: {:?} -> {:?}", pairs, filtered);
160
161    // Scenario 3: Configurable filter
162    fn configurable_filter(enable_filter: bool) -> BoxBiPredicate<i32, i32> {
163        if enable_filter {
164            BoxBiPredicate::new(|x: &i32, y: &i32| x + y > 5)
165        } else {
166            BoxBiPredicate::always_true()
167        }
168    }
169
170    let pairs = vec![(1, 2), (3, 4), (5, 6)];
171
172    let filter_enabled = configurable_filter(true);
173    let closure = filter_enabled.into_fn();
174    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
175    println!("\nFilter enabled: {:?} -> {:?}", pairs, filtered);
176
177    let filter_disabled = configurable_filter(false);
178    let closure = filter_disabled.into_fn();
179    let filtered: Vec<_> = pairs.iter().filter(|(x, y)| closure(x, y)).collect();
180    println!("Filter disabled: {:?} -> {:?}", pairs, filtered);
181}
Source

pub fn not(self) -> BoxBiPredicate<T, U>
where T: 'static, U: 'static,

Returns a bi-predicate that represents the logical negation of this bi-predicate.

This method consumes self due to single-ownership semantics.

§Returns

A new bi-predicate representing the logical negation.

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pub fn nand<P>(self, other: P) -> BoxBiPredicate<T, U>
where P: BiPredicate<T, U> + 'static, T: 'static, U: 'static,

Returns a bi-predicate that represents the logical NAND (NOT AND) of this bi-predicate and another.

NAND returns true unless both bi-predicates are true. Equivalent to !(self AND other).

This method consumes self due to single-ownership semantics.

§Parameters
  • other - The other bi-predicate to combine with.
§Returns

A new bi-predicate representing the logical NAND.

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pub fn xor<P>(self, other: P) -> BoxBiPredicate<T, U>
where P: BiPredicate<T, U> + 'static, T: 'static, U: 'static,

Returns a bi-predicate that represents the logical XOR (exclusive OR) of this bi-predicate and another.

XOR returns true if exactly one of the bi-predicates is true.

This method consumes self due to single-ownership semantics.

§Parameters
  • other - The other bi-predicate to combine with.
§Returns

A new bi-predicate representing the logical XOR.

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pub fn nor<P>(self, other: P) -> BoxBiPredicate<T, U>
where P: BiPredicate<T, U> + 'static, T: 'static, U: 'static,

Returns a bi-predicate that represents the logical NOR (NOT OR) of this bi-predicate and another.

NOR returns true only when both bi-predicates are false. Equivalent to !(self OR other).

This method consumes self due to single-ownership semantics.

§Parameters
  • other - The other bi-predicate to combine with.
§Returns

A new bi-predicate representing the logical NOR.

Trait Implementations§

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impl<T, U> BiPredicate<T, U> for BoxBiPredicate<T, U>

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fn test(&self, first: &T, second: &U) -> bool

Tests whether the given values satisfy this bi-predicate. Read more
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fn into_box(self) -> BoxBiPredicate<T, U>

Converts this bi-predicate into a BoxBiPredicate. Read more
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fn into_rc(self) -> RcBiPredicate<T, U>
where Self: 'static,

Converts this bi-predicate into an RcBiPredicate. Read more
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fn into_fn(self) -> impl Fn(&T, &U) -> bool

Converts this bi-predicate into a closure that can be used directly with standard library methods. Read more
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fn into_arc(self) -> ArcBiPredicate<T, U>
where Self: Sized + Send + Sync + 'static,

Converts this bi-predicate into an ArcBiPredicate. Read more
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impl<T, U> Debug for BoxBiPredicate<T, U>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<T, U> Display for BoxBiPredicate<T, U>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<T, U> Freeze for BoxBiPredicate<T, U>

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impl<T, U> !RefUnwindSafe for BoxBiPredicate<T, U>

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impl<T, U> !Send for BoxBiPredicate<T, U>

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impl<T, U> !Sync for BoxBiPredicate<T, U>

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impl<T, U> Unpin for BoxBiPredicate<T, U>

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impl<T, U> UnsafeUnpin for BoxBiPredicate<T, U>

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impl<T, U> !UnwindSafe for BoxBiPredicate<T, U>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.