support tuples

1 files changed, 9 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index dbac013..3656bf7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -473,6 +473,15 @@ impl TypeTransform {
                     quote! {#arg.map_err(|x| #err_inner)}
                 }
             }
+            TypeTransform::Tuple(types) => {
+                let idents = (0..types.len()).map(|i| format_ident!("v{}", i));
+                // FUTURE: let transforms = std::iter::zip(idents, types).map(|(i, t)| t.convert(quote! {#i}));
+                let transforms = types.iter().enumerate().map(|(idx, t)| {
+                    let id = format_ident!("v{}", idx);
+                    t.convert(quote! {#id})
+                });
+                quote! { {let (#(#idents),*) = #arg; (#(#transforms),*)} }
+            }
             TypeTransform::IntoIterMapCollect(types) => {
                 let idents = (0..types.len()).map(|i| format_ident!("v{}", i));
                 // FUTURE: let transforms = std::iter::zip(idents, types).map(|(i, t)| t.convert(quote! {#i}));