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d44dc26d1b
Addresses SR-2605.
If you're refactoring a `guard` into an `if`, it's easy to
accidentally end up with invalid code like this in the transition:
```
if condition else {
}
```
The parser rightly complains about the `else`, but has poor recovery
afterward, interpreting the following brace as a closure, which may in
turn lead to other unhelpful errors after:
```
error: expected '{' after 'if' condition
if condition else {
^
error: braced block of statements is an unused closure
if condition else {
^
```
Improve the diagnostics to instead explicitly detect this pattern and
mark it as an error.
6 lines
255 B
Swift
6 lines
255 B
Swift
// RUN: %target-typecheck-verify-swift
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if true else { // expected-error {{unexpected 'else' immediately following 'if' condition}}
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} // expected-note@-1 {{remove 'else' to execute the braced block of statements when the condition is true}}
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