pub struct Optional(/* private fields */);Implementations§
Source§impl Optional
impl Optional
Sourcepub fn new(node: Box<dyn Node>) -> Self
pub fn new(node: Box<dyn Node>) -> Self
Examples found in repository?
examples/stacked.rs (lines 11-16)
5fn main() {
6 let diagram = Diagram::default()
7 .push(Box::new(Terminal::new("CREATE")))
8 .push(Box::new(Terminal::new("VIRTUAL")))
9 .push(Box::new(Terminal::new("TABLE")))
10 .push(Box::new(
11 Optional::new(Box::new(
12 Sequence::default()
13 .push(Box::new(Terminal::new("IF")))
14 .push(Box::new(Terminal::new("NOT")))
15 .push(Box::new(Terminal::new("EXISTS")))
16 ))
17 ))
18 .next_row()
19 .push(Box::new(
20 Optional::new(Box::new(
21 Sequence::default()
22 .push(Box::new(NonTerminal::new("schema-name")))
23 .push(Box::new(Terminal::new(".")))
24 ))
25 ))
26 .push(Box::new(NonTerminal::new("table-name")))
27 .next_row()
28 .push(Box::new(Terminal::new("USING")))
29 .push(Box::new(NonTerminal::new("module-name")))
30 .push(Box::new(
31 Optional::new(Box::new(
32 Sequence::default()
33 .push(Box::new(Terminal::new("(")))
34 .push(Box::new(
35 Repeat::new(Box::new(
36 NonTerminal::new("module-argument")
37 ))
38 ))
39 .push(Box::new(Terminal::new(")")))
40 ))
41 ));
42 println!("{}", diagram);
43}More examples
examples/json.rs (lines 9-26)
5fn main() {
6 let object = Diagram::default()
7 .push(Box::new(Terminal::new("{")))
8 .push(Box::new(
9 Optional::new(Box::new(
10 Sequence::default()
11 .push(Box::new(
12 Repeat::new(Box::new(
13 Sequence::default()
14 .push(Box::new(NonTerminal::new("string")))
15 .push(Box::new(Terminal::new(":")))
16 .push(Box::new(NonTerminal::new("value")))
17 .push(Box::new(Terminal::new(",")))
18 ))
19 ))
20 .push(Box::new(
21 Sequence::default()
22 .push(Box::new(NonTerminal::new("string")))
23 .push(Box::new(Terminal::new(":")))
24 .push(Box::new(NonTerminal::new("value")))
25 ))
26 ))
27 ))
28 .push(Box::new(Terminal::new("}")));
29 println!("object:\n{}\n", object);
30
31 let array = Diagram::default()
32 .push(Box::new(Terminal::new("[")))
33 .push(Box::new(
34 Optional::new(Box::new(
35 Sequence::default()
36 .push(Box::new(
37 Repeat::new(Box::new(
38 Sequence::default()
39 .push(Box::new(NonTerminal::new("value")))
40 .push(Box::new(Terminal::new(",")))
41 ))
42 ))
43 .push(Box::new(NonTerminal::new("value")))
44 ))
45 ))
46 .push(Box::new(Terminal::new("]")));
47 println!("array:\n{}\n", array);
48
49 let value = Diagram::default()
50 .push(Box::new(
51 Choice::default()
52 .push(Box::new(NonTerminal::new("string")))
53 .push(Box::new(NonTerminal::new("number")))
54 .push(Box::new(NonTerminal::new("object")))
55 .push(Box::new(NonTerminal::new("array")))
56 .push(Box::new(Terminal::new("true")))
57 .push(Box::new(Terminal::new("false")))
58 .push(Box::new(Terminal::new("null")))
59 ));
60 println!("value:\n{}\n", value);
61
62 let string = Diagram::default()
63 .push(Box::new(Terminal::new("\"")))
64 .push(Box::new(
65 Repeat::new(Box::new(
66 Choice::default()
67 .push(Box::new(Terminal::new("Any unicode character except \" or \\ or control character")))
68 .push(Box::new(
69 Sequence::default()
70 .push(Box::new(Terminal::new("\\")))
71 .push(Box::new(
72 Choice::default()
73 .push(Box::new(Terminal::new("\"")))
74 .push(Box::new(Terminal::new("\\")))
75 .push(Box::new(Terminal::new("/")))
76 .push(Box::new(Terminal::new("b")))
77 .push(Box::new(Terminal::new("f")))
78 .push(Box::new(Terminal::new("n")))
79 .push(Box::new(Terminal::new("r")))
80 .push(Box::new(Terminal::new("t")))
81 .push(Box::new(
82 Sequence::default()
83 .push(Box::new(Terminal::new("u")))
84 .push(Box::new(
85 Repeat::new(Box::new(Terminal::new("hexadecimal digit")))
86 .min(4)
87 .max(4)
88 ))
89 ))
90 ))
91 ))
92 ))
93 ))
94 .push(Box::new(Terminal::new("\"")));
95 println!("string:\n{}\n", string);
96
97 let number = Diagram::default()
98 .push(Box::new(Optional::new(Box::new(Terminal::new("-")))))
99 .push(Box::new(
100 Choice::default()
101 .push(Box::new(Terminal::new("0")))
102 .push(Box::new(
103 Sequence::default()
104 .push(Box::new(Terminal::new("digit 1-9")))
105 .push(Box::new(
106 Repeat::new(Box::new(Terminal::new("digit")))
107 ))
108 ))
109 ))
110 .push(Box::new(
111 Optional::new(Box::new(
112 Sequence::default()
113 .push(Box::new(Terminal::new(".")))
114 .push(Box::new(
115 Repeat::new(Box::new(Terminal::new("digit")))
116 .min(1)
117 ))
118 ))
119 ))
120 .push(Box::new(
121 Optional::new(Box::new(
122 Sequence::default()
123 .push(Box::new(
124 Choice::default()
125 .push(Box::new(Terminal::new("e")))
126 .push(Box::new(Terminal::new("E")))
127 ))
128 .push(Box::new(
129 Optional::new(Box::new(
130 Choice::default()
131 .push(Box::new(Terminal::new("+")))
132 .push(Box::new(Terminal::new("-")))
133 ))
134 ))
135
136 .push(Box::new(
137 Repeat::new(Box::new(Terminal::new("digit")))
138 .min(1)
139 ))
140 ))
141 ));
142 println!("number:\n{}", number);
143}Trait Implementations§
Auto Trait Implementations§
impl !RefUnwindSafe for Optional
impl !Send for Optional
impl !Sync for Optional
impl !UnwindSafe for Optional
impl Freeze for Optional
impl Unpin for Optional
impl UnsafeUnpin for Optional
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more