1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87

use crate::nodes::InnerNode;
use crate::nodes::InspectVec;
use crate::Loc;
use crate::Node;

#[cfg(feature = "compile-with-external-structures")]
use crate::containers::ExternalList;
#[cfg(feature = "compile-with-external-structures")]
type List<T> = ExternalList<T>;
#[cfg(not(feature = "compile-with-external-structures"))]
type List<T> = Vec<T>;


#[cfg(feature = "compile-with-external-structures")]
use crate::containers::ExternalMaybeLoc;
#[cfg(feature = "compile-with-external-structures")]
type MaybeLoc = ExternalMaybeLoc;
#[cfg(not(feature = "compile-with-external-structures"))]
type MaybeLoc = Option<Loc>;


/// Represents an array pattern *with trailing comma* used in pattern matching
///
/// It's slightly different from `ArrayPattern`, trailing comma at the end works as `, *`
///
#[derive(Debug, Clone, PartialEq)]
#[repr(C)]
pub struct ArrayPatternWithTail {
    /// A list of elements
    ///
    pub elements: List<Node>,
    /// Location of the open bracket
    ///
    /// ```text
    /// [1, ^a, 3 => foo,]
    /// ~
    /// ```
    ///
    /// `None` for pattern like `1, 2,` without brackets
    ///
    pub begin_l: MaybeLoc,
    /// Location of the closing bracket
    ///
    /// ```text
    /// [1, ^a, 3 => foo,]
    ///                  ~
    /// ```
    ///
    /// `None` for pattern like `1, 2,` without brackets
    ///
    pub end_l: MaybeLoc,
    /// Location of the full expression
    ///
    /// ```text
    /// [1, ^a, 3 => foo,]
    /// ~~~~~~~~~~~~~~~~~~
    /// ```
    ///
    pub expression_l: Loc,
}

impl InnerNode for ArrayPatternWithTail {
    fn expression(&self) -> &Loc {
        &self.expression_l
    }

    fn inspected_children(&self, indent: usize) -> Vec<String> {
        let mut result = InspectVec::new(indent);
        result.push_nodes(&self.elements);
        result.strings()
    }

    fn str_type(&self) -> &'static str {
        "array_pattern_with_tail"
    }

    fn print_with_locs(&self) {
        println!("{}", self.inspect(0));
        for node in self.elements.iter() {
            node.inner_ref().print_with_locs();
        }
        self.begin_l.as_ref().map(|loc| loc.print("begin"));
        self.end_l.as_ref().map(|loc| loc.print("end"));
        self.expression_l.print("expression");
    }
}