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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138

use std::iter::FromIterator;

use crate::{Array, Item, Table};

/// Type representing a TOML array of tables
#[derive(Clone, Debug, Default)]
pub struct ArrayOfTables {
    // Always Vec<Item::Table>, just `Item` to make `Index` work
    pub(crate) values: Vec<Item>,
}

/// Constructors
///
/// See also `FromIterator`
impl ArrayOfTables {
    /// Creates an empty array of tables.
    pub fn new() -> Self {
        Default::default()
    }
}

/// Formatting
impl ArrayOfTables {
    /// Convert to an inline array
    pub fn into_array(mut self) -> Array {
        for value in self.values.iter_mut() {
            value.make_value();
        }
        let mut a = Array::with_vec(self.values);
        a.fmt();
        a
    }
}

impl ArrayOfTables {
    /// Returns an iterator over tables.
    pub fn iter(&self) -> ArrayOfTablesIter<'_> {
        Box::new(self.values.iter().filter_map(Item::as_table))
    }

    /// Returns an iterator over tables.
    pub fn iter_mut(&mut self) -> ArrayOfTablesIterMut<'_> {
        Box::new(self.values.iter_mut().filter_map(Item::as_table_mut))
    }

    /// Returns the length of the underlying Vec.
    /// To get the actual number of items use `a.iter().count()`.
    pub fn len(&self) -> usize {
        self.values.len()
    }

    /// Returns true iff `self.len() == 0`.
    pub fn is_empty(&self) -> bool {
        self.len() == 0
    }

    /// Removes all the tables.
    pub fn clear(&mut self) {
        self.values.clear()
    }

    /// Returns an optional reference to the table.
    pub fn get(&self, index: usize) -> Option<&Table> {
        self.values.get(index).and_then(Item::as_table)
    }

    /// Returns an optional mutable reference to the table.
    pub fn get_mut(&mut self, index: usize) -> Option<&mut Table> {
        self.values.get_mut(index).and_then(Item::as_table_mut)
    }

    /// Appends a table to the array.
    pub fn push(&mut self, table: Table) {
        self.values.push(Item::Table(table));
    }

    /// Removes a table with the given index.
    pub fn remove(&mut self, index: usize) {
        self.values.remove(index);
    }
}

/// An iterator type over `ArrayOfTables`'s values.
pub type ArrayOfTablesIter<'a> = Box<dyn Iterator<Item = &'a Table> + 'a>;
/// An iterator type over `ArrayOfTables`'s values.
pub type ArrayOfTablesIterMut<'a> = Box<dyn Iterator<Item = &'a mut Table> + 'a>;
/// An iterator type over `ArrayOfTables`'s values.
pub type ArrayOfTablesIntoIter = Box<dyn Iterator<Item = Table>>;

impl Extend<Table> for ArrayOfTables {
    fn extend<T: IntoIterator<Item = Table>>(&mut self, iter: T) {
        for value in iter {
            self.push(value);
        }
    }
}

impl FromIterator<Table> for ArrayOfTables {
    fn from_iter<I>(iter: I) -> Self
    where
        I: IntoIterator<Item = Table>,
    {
        let v = iter.into_iter().map(Item::Table);
        ArrayOfTables {
            values: v.collect(),
        }
    }
}

impl IntoIterator for ArrayOfTables {
    type Item = Table;
    type IntoIter = ArrayOfTablesIntoIter;

    fn into_iter(self) -> Self::IntoIter {
        Box::new(
            self.values
                .into_iter()
                .filter(|v| v.is_table())
                .map(|v| v.into_table().unwrap()),
        )
    }
}

impl<'s> IntoIterator for &'s ArrayOfTables {
    type Item = &'s Table;
    type IntoIter = ArrayOfTablesIter<'s>;

    fn into_iter(self) -> Self::IntoIter {
        self.iter()
    }
}

impl std::fmt::Display for ArrayOfTables {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        // HACK: Without the header, we don't really have a proper way of printing this
        self.clone().into_array().fmt(f)
    }
}