alamb commented on code in PR #7322:
URL: https://github.com/apache/arrow-rs/pull/7322#discussion_r2010558897
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arrow-array/src/cast.rs:
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@@ -72,7 +72,7 @@ macro_rules! repeat_pat {
/// [`DataType`]: arrow_schema::DataType
#[macro_export]
macro_rules! downcast_integer {
- ($($data_type:expr),+ => ($m:path $(, $args:tt)*), $($p:pat =>
$fallback:expr $(,)*)*) => {
+ ($($data_type:expr),+ => ($m:path $(, $args:tt)*), $($p:pat $(if
$pred:expr)* => $fallback:expr $(,)*)*) => {
Review Comment:
Thanks @rluvaton -- this looks useful
In order for others to be able to find and use this functionality, can you
please add some doc examples that show how to use this optional `if_predicate`
syntax?
This applies to all macros to which you added the option
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