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fix printing for single element tuple values (#2786)

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adds trailing comma to single element tuple

example:
```carbon
package ExplorerTest api;

fn Main() -> i32
{
  var a: (i32,) = (1, 2);
  return 0;
}

```

change in error message:
```diff
-type error in initializer of variable: '(i32, i32)' is not implicitly convertible to '(i32)'
+type error in initializer of variable: '(i32, i32)' is not implicitly convertible to '(i32,)'
```
This commit is contained in:
Manmeet Singh
2023-04-21 09:34:22 -07:00
committed by GitHub
parent 7eabd0a64a
commit f310316ef4
5 changed files with 11 additions and 7 deletions
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explorer/testdata/basic_syntax/fail_alternative_not_type.carbon
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+1 -1
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@@ -8,7 +8,7 @@
package ExplorerTest api;
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/basic_syntax/fail_alternative_not_type.carbon:[[@LINE+1]]: type error in type expression: '(i32)' is not implicitly convertible to 'type'
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/basic_syntax/fail_alternative_not_type.carbon:[[@LINE+1]]: type error in type expression: '(i32,)' is not implicitly convertible to 'type'
choice C { X(42) }
fn Main() -> i32 {