swift-mirror/test/IDE/copy_expr.swift at 8c48ca2e8c3f877b51103612c02cf9ce9d38ab5b - swift-mirror - Gitea: Git with a cup of tea

averello/swift-mirror

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Michael Gottesman e6f1691122 [copy-operator] Add support for the copy operator in preparation for making consuming and borrowing no implicit copy.

Some notes:

1. I implemented this as a contextual keyword that can only apply directly to
lvalues. This ensures that we can still call functions called copy, define
variables named copy, etc. I added tests for both the c++ and swift-syntax based
parsers to validate this. So there shouldn't be any source breaks.

2. I did a little bit of type checker work to ensure that we do not treat
copy_expr's result as an lvalue. Otherwise, one could call mutating functions on
it or assign to it, which we do not want since the result of copy_value is

3. As expected, by creating a specific expr, I was able to have much greater
control of the SILGen codegen and thus eliminate extraneous copies and other
weirdness than if we used a function and had to go through SILGenApply.

rdar://101862423

2023-05-17 22:42:42 -07:00

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 // RUN: %empty-directory(%t)
 // RUN: %target-swift-ide-test -batch-code-completion -source-filename %s -filecheck %raw-FileCheck -completion-output-dir %t
 func test(myParam: Int) {
   copy #^COPY^#
   // COPY: Decl[LocalVar]/Local:               myParam[#Int#]; name=myParam
 }