azucar 0.1.0

syntax sugar
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
149
150
151
152
153
154
155
156

#![allow(dead_code)]

use azucar::{Index, index, infer, ref_ops};

extern crate std;

use core::ops::Range;
use std::prelude::rust_2021::*;
use std::{dbg, vec};

struct UnCopy {}

impl Default for UnCopy {
	fn default() -> Self {
		Self {}
	}
}

impl azucar::Infer for UnCopy {
	fn infer() -> Self {
		Self {}
	}
}

#[infer]
impl core::ops::Add for &UnCopy {
	type Output = UnCopy;

	#[inline]
	fn add(self, _: Self) -> Self::Output {
		_
	}
}

fn takes_option_vec(a: i32, _: Vec<Option<()>>) -> i32 {
	a + 1
}
fn takes_optional_arg(a: i32, _: Option<()>) -> i32 {
	a + 1
}

#[infer]
fn infer_option() {
	takes_optional_arg(1, _);

	let _x = takes_option_vec(4, dbg!(vec![_; 3]));
	let _y = takes_option_vec(4, dbg!(vec![_, _, _]));
}

fn infer_option_desugar() {
	let _x = takes_option_vec(3, dbg!(vec![azucar::Infer::infer(); 3]));
	let _y = takes_option_vec(
		3,
		dbg!(vec![
			azucar::Infer::infer(),
			azucar::Infer::infer(),
			azucar::Infer::infer()
		]),
	);
}

#[ref_ops]
fn uncopy() {
	let x = UnCopy {};
	let y = x + x;
	let z = x + y + x;
	let _ = z;
}

fn uncopy_desugar() {
	let x = UnCopy {};
	let y = &x + &x;
	let z = &(&x + &y) + &x;
	let _ = z;
}

struct MatRef<'a>(&'a ());
struct MatMut<'a> {
	inner: &'a mut (),
}

impl<'a> core::ops::Index<(usize, usize)> for MatRef<'a> {
	type Output = f32;

	fn index(&self, index: (usize, usize)) -> &Self::Output {
		todo!()
	}
}
impl<'a> core::ops::Index<(usize, usize)> for MatMut<'a> {
	type Output = f32;

	fn index(&self, index: (usize, usize)) -> &Self::Output {
		todo!()
	}
}
impl<'short, 'a> azucar::Index<'short, (Range<usize>, Range<usize>)> for MatRef<'a> {
	type Output = MatRef<'short>;

	fn index(&'short self, idx: (Range<usize>, Range<usize>)) -> Self::Output {
		todo!()
	}
}
impl<'short, 'a> azucar::IndexMut<'short, (Range<usize>, Range<usize>)> for MatRef<'a> {
	type Output = MatRef<'short>;

	fn index_mut(&'short mut self, idx: (Range<usize>, Range<usize>)) -> Self::Output {
		todo!()
	}
}
impl<'a> azucar::IndexMove<(Range<usize>, Range<usize>)> for MatRef<'a> {
	type Output = MatRef<'a>;

	fn index_move(self, idx: (Range<usize>, Range<usize>)) -> Self::Output {
		todo!()
	}
}

impl<'short, 'a> azucar::Index<'short, (Range<usize>, Range<usize>)> for MatMut<'a> {
	type Output = MatRef<'short>;

	fn index(&'short self, idx: (Range<usize>, Range<usize>)) -> Self::Output {
		todo!()
	}
}
impl<'short, 'a> azucar::IndexMut<'short, (Range<usize>, Range<usize>)> for MatMut<'a> {
	type Output = MatMut<'short>;

	fn index_mut(&'short mut self, idx: (Range<usize>, Range<usize>)) -> Self::Output {
		todo!()
	}
}
impl<'a> azucar::IndexMove<(Range<usize>, Range<usize>)> for MatMut<'a> {
	type Output = MatMut<'a>;

	fn index_move(self, idx: (Range<usize>, Range<usize>)) -> Self::Output {
		todo!()
	}
}

#[index]
fn foo() {
	let mut x = vec![0, 1, 2];

	let y = (*x)[&mut ..]; // &mut [i32]

	let mut m = MatMut { inner: &mut () };

	let regular_index = m[(1, 2)]; // f32

	// doesn't compile because std::ops::Index doesn't support user Ref/Mut types
	// m[(1..3, 0..6)];

	let ref_index = m[&(1..3, 0..6)]; // MatRef<'short>
	let mut_index = m[&mut (1..3, 0..6)]; // MatRef<'short>
	let move_index = m[*(1..3, 0..6)]; // MatMut<'long>
}