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54 lines
1.1 KiB
Rust
54 lines
1.1 KiB
Rust
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#[macro_export(local_inner_macros)]
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macro_rules! join {
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{
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$caller:tt
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sep = [{ $($sep:tt)* }]
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} => {
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$crate::tt_call::tt_return! {
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$caller
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joined = [{ }]
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}
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};
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{
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$caller:tt
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sep = [{ $($sep:tt)* }]
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item = [{ $($head:tt)* }]
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$(
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item = [{ $($tail:tt)* }]
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)+
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} => {
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$crate::tt_call::tt_call! {
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macro = [{ $crate::join }]
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sep = [{ $($sep)* }]
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$(
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item = [{ $($tail)* }]
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)+
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~~> $crate::join! {
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$caller
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prepend = [{ $($head)* $($sep)* }]
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}
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}
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};
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{
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$caller:tt
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sep = [{ $($sep:tt)* }]
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item = [{ $($head:tt)* }]
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} => {
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$crate::tt_call::tt_return! {
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$caller
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joined = [{ $($head)* }]
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}
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};
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{
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$caller:tt
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prepend = [{ $($prepend:tt)* }]
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joined = [{ $($joined:tt)* }]
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} => {
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$crate::tt_call::tt_return! {
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$caller
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joined = [{ $($prepend)* $($joined)* }]
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}
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};
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}
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