cg2 0.2.1

Rust code generator.
Documentation 
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
139
140
141
142
143
144
145
146
147
148

use alloc::{string::String, vec::Vec};

use crate::Generator;

pub trait Flexible {
  fn call(&self, g: &mut Generator);
}

pub trait FlexibleList {
  fn call(&self) -> Vec<String>;
}

impl Flexible for () {
  fn call(&self, _g: &mut Generator) {}
}

impl Flexible for char {
  fn call(&self, g: &mut Generator) {
    g.outc(*self);
  }
}

impl Flexible for &str {
  fn call(&self, g: &mut Generator) {
    g.out(self);
  }
}

impl Flexible for String {
  fn call(&self, g: &mut Generator) {
    g.out(self);
  }
}

impl Flexible for &String {
  fn call(&self, g: &mut Generator) {
    g.out(self);
  }
}

impl<F> Flexible for F
where
  F: Fn(&mut Generator),
{
  fn call(&self, g: &mut Generator) {
    self(g);
  }
}

impl<I> FlexibleList for I
where
  I: Flexible,
{
  fn call(&self) -> Vec<String> {
    let mut g = Generator::new();

    self.call(&mut g);

    vec![g.into_code()]
  }
}

impl<const N: usize, I> FlexibleList for &[I; N]
where
  I: Flexible,
{
  fn call(&self) -> Vec<String> {
    (*self as &[_]).call()
  }
}

impl<I> FlexibleList for &[I]
where
  I: Flexible,
{
  fn call(&self) -> Vec<String> {
    let mut items = vec![];

    for i in *self {
      let mut g = Generator::new();

      i.call(&mut g);

      items.push(g.into_code());
    }

    items
  }
}

macro_rules! impl_flexible_list_tuple {
  ($($item:ident),*) => {
    impl_flexible_list_tuple!(@impl [$($item),*]);
  };

  (@impl []) => {};

  (@impl [$first:ident $(, $item:ident)*]) => {
    impl_flexible_list_tuple!(@impl $first $(, $item)*);
    impl_flexible_list_tuple!(@impl [$($item),*]);
  };

  (@impl $first:ident $(, $item:ident)*) => {
    impl<$first $(, $item)*> FlexibleList for ($first, $($item),*)
    where
      $first: Flexible,
      $($item: Flexible),*
    {
      fn call(&self) -> Vec<String> {
        (&self).call()
      }
    }

    impl<$first $(, $item)*> FlexibleList for &($first, $($item),*)
    where
      $first: Flexible,
      $($item: Flexible),*
    {
      fn call(&self) -> Vec<String> {
        #[expect(non_snake_case)]
        let ($first, $($item),*) = self;

        let mut items = vec![];

        let mut g = Generator::new();

        $first.call(&mut g);
        items.push(g.code().clone());

        $(
          g.clear();
          $item.call(&mut g);
          items.push(g.code().clone());
        )*

        items
      }
    }
  };
}

#[rustfmt::skip]
impl_flexible_list_tuple!(
  I0, I1, I2, I3, I4, I5, I6, I7,
  I8, I9, I10, I11, I12, I13, I14, I15,
  I16, I17, I18, I19, I20, I21, I22, I23,
  I24, I25, I26, I27, I28, I29, I30, I31
);