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Tuple restrictions (#486)

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* implement tuple restrictions: (1) named fields after positional, (2) order matters

* after_named_member => seen_named_member
This commit is contained in:
Jeremy G. Siek
2021-04-22 17:51:43 -04:00
committed by GitHub
parent 8b78a85276
commit 5946d9c033
17 changed files with 98 additions and 26 deletions
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executable_semantics/testdata/tuple_match2.6c
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@@ -5,7 +5,7 @@
// Test matching with a mixture of positional and named fields.
fn main() -> Int {
var auto: t = (.x = 5, 2);
var auto: t = (2, .x = 5);
match (t) {
case (auto: a, .x = auto: b) =>
return a - b + 3;