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#![no_std]
#[macro_export]
macro_rules! va_invoke {
($mac:ident $($cur_args:tt)*) => {
$mac!($($cur_args)* (1) (_Va0) (0));
$mac!($($cur_args)* (2) (_Va0, _Va1) (0, 1));
$mac!($($cur_args)* (3) (_Va0, _Va1, _Va2) (0, 1, 2));
$mac!($($cur_args)* (4) (_Va0, _Va1, _Va2, _Va3) (0, 1, 2, 3));
$mac!($($cur_args)* (5) (_Va0, _Va1, _Va2, _Va3, _Va4) (0, 1, 2, 3, 4));
$mac!($($cur_args)* (6) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5) (0, 1, 2, 3, 4, 5));
$mac!($($cur_args)* (7) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6) (0, 1, 2, 3, 4, 5, 6));
$mac!($($cur_args)* (8) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7) (0, 1, 2, 3, 4, 5, 6, 7));
$mac!($($cur_args)* (9) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8) (0, 1, 2, 3, 4, 5, 6, 7, 8));
$mac!($($cur_args)* (10) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9));
$mac!($($cur_args)* (11) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
$mac!($($cur_args)* (12) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11));
};
}
#[macro_export]
macro_rules! va_invoke_more {
($mac:ident $($cur_args:tt)*) => {
va_invoke!($mac $($cur_args)*);
$mac!($($cur_args)* (13) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12));
$mac!($($cur_args)* (14) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13));
$mac!($($cur_args)* (15) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14));
$mac!($($cur_args)* (16) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15));
$mac!($($cur_args)* (17) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16));
$mac!($($cur_args)* (18) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17));
$mac!($($cur_args)* (19) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18));
$mac!($($cur_args)* (20) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19));
$mac!($($cur_args)* (21) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20));
$mac!($($cur_args)* (22) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21));
$mac!($($cur_args)* (23) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22));
$mac!($($cur_args)* (24) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23));
$mac!($($cur_args)* (25) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23, _Va24) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24));
$mac!($($cur_args)* (26) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23, _Va24, _Va25) (0, 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));
$mac!($($cur_args)* (27) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23, _Va24, _Va25, _Va26) (0, 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));
$mac!($($cur_args)* (28) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23, _Va24, _Va25, _Va26, _Va27) (0, 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));
$mac!($($cur_args)* (29) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23, _Va24, _Va25, _Va26, _Va27, _Va28) (0, 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));
$mac!($($cur_args)* (30) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23, _Va24, _Va25, _Va26, _Va27, _Va28, _Va29) (0, 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));
$mac!($($cur_args)* (31) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23, _Va24, _Va25, _Va26, _Va27, _Va28, _Va29, _Va30) (0, 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));
$mac!($($cur_args)* (32) (_Va0, _Va1, _Va2, _Va3, _Va4, _Va5, _Va6, _Va7, _Va8, _Va9, _Va10, _Va11, _Va12, _Va13, _Va14, _Va15, _Va16, _Va17, _Va18, _Va19, _Va20, _Va21, _Va22, _Va23, _Va24, _Va25, _Va26, _Va27, _Va28, _Va29, _Va30, _Va31) (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31));
};
}
#[macro_export]
macro_rules! va_invoke_with_nil {
($mac:ident $($cur_args:tt)*) => {
$mac!($($cur_args)* (0) () ());
$crate::va_invoke!($mac $($cur_args)*);
};
}
#[macro_export]
macro_rules! va_invoke_more_with_nil {
($mac:ident $($cur_args:tt)*) => {
$mac!($($cur_args)* (0) () ());
$crate::va_invoke_more!($mac $($cur_args)*);
};
}
#[doc(hidden)]
#[macro_export]
macro_rules! _va_expand {
(($invoke_mac:path) ($($pat_va_len:tt)+) $pat_va_idents:tt $pat_va_indices:tt $($mac_body:tt)*) => {
macro_rules! _va_mac {
(($($pat_va_len)+) $pat_va_idents $pat_va_indices) => { $($mac_body)* }
}
$invoke_mac!(_va_mac);
};
(($invoke_mac:path) $dummy_mac:ident $pat_va_len:tt $pat_va_idents:tt $pat_va_indices:tt $($mac_body:tt)*) => {
macro_rules! $dummy_mac {
($pat_va_len $pat_va_idents $pat_va_indices) => { $($mac_body)* }
}
$invoke_mac!($dummy_mac);
};
}
#[macro_export]
macro_rules! va_expand {
($($tt:tt)+) => {
$crate::_va_expand!(($crate::va_invoke) $($tt)*);
};
}
#[macro_export]
macro_rules! va_expand_more {
($($tt:tt)+) => {
$crate::_va_expand!(($crate::va_invoke_more) $($tt)*);
};
}
#[macro_export]
macro_rules! va_expand_with_nil {
($($tt:tt)+) => {
$crate::_va_expand!(($crate::va_invoke_with_nil) $($tt)*);
};
}
#[macro_export]
macro_rules! va_expand_more_with_nil {
($($tt:tt)+) => {
$crate::_va_expand!(($crate::va_invoke_more_with_nil) $($tt)*);
};
}
#[test]
fn test_va_len() {
let mut lengths: [usize; 33] = [0; 33];
va_expand_more_with_nil!{ ($va_len:tt) ($($va_idents:ident),*) ($($va_indices:tt),*)
lengths[$va_len] = $va_len;
}
for (expected_len, &len) in lengths.iter().enumerate() {
assert_eq!(expected_len, len);
}
}
#[test]
fn test_va_indices() {
let mut indices: [[usize; 33]; 33] = [[0; 33]; 33];
va_expand_more_with_nil!{ ($va_len:tt) ($($va_idents:ident),*) ($($va_indices:tt),*)
$(
indices[$va_len][$va_indices] = $va_indices;
)*
}
for (len, indices) in indices.iter().enumerate() {
for (expected_idx, &idx) in indices[..len].iter().enumerate() {
assert_eq!(expected_idx, idx);
}
}
}
#[test]
fn test_va_idents() {
let mut idents: [[&'static str; 33]; 33] = [[""; 33]; 33];
va_expand_more_with_nil!{ ($va_len:tt) ($($va_idents:ident),*) ($($va_indices:tt),*)
$(
idents[$va_len][$va_indices] = stringify!($va_idents);
)*
}
for (len, idents) in idents.iter().enumerate() {
for (expected_idx, ident) in idents[..len].iter().enumerate() {
assert!(ident.starts_with("_Va"));
let idx = ident
.split("_Va")
.nth(1)
.unwrap()
.parse::<usize>()
.unwrap();
assert_eq!(expected_idx, idx);
}
}
}
#[test]
fn test_dummy_identifier_syntax() {
let mut i = 0;
va_expand!{ _foo ($va_len:tt) ($($va_idents:ident),*) ($($va_indices:tt),*)
i += $va_len;
}
va_expand_more!{ _asf ($va_len:tt) ($($va_idents:ident),*) ($($va_indices:tt),*)
i += $va_len;
}
va_expand_with_nil!{ _gfi ($va_len:tt) ($($va_idents:ident),*) ($($va_indices:tt),*)
i += $va_len;
}
va_expand_more_with_nil!{ _nmb ($va_len:tt) ($($va_idents:ident),*) ($($va_indices:tt),*)
i += $va_len;
}
let expected_i = (1..13).fold(0, |acc, next| acc + next) * 2 +
(1..33).fold(0, |acc, next| acc + next) * 2;
assert_eq!(expected_i, i);
}