Nathan Hawes edbbefce91 [CodeCompletion][Sema] Add fix to treat empty or single-element array literals as dictionaries when used as such ...

In the single-element case, it is treated as the dictionary key.

func takesDict(_ x: [Int: String]) {}
takesDict([]) // diagnose with fixit to add missing ':'
takesDict([1]) // diagnose with fixit to add missing ': <#value#>'
takesDict([foo.<complete>]) // prioritise Int members in completion results -
                            // the user just hasn't written the value yet.

The above previously failed with a generic mismatch error in normal type
checking (due to the literal being parsed as an array literal) and code
completion could not pick up the expected type from the context.

2020-11-11 11:48:39 -08:00

414 KiB

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