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FIR: rewrite lambda return type inference

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* `return` should only be added to the last statement if the return
   type is not Unit

 * If there is a `return` without an argument, then the expected return
   type is Unit and the last expression is not a return argument (unless
   it's an incomplete call, in which case it is inferred to return Unit;
   this behavior is questionable, but inherited from K1)

 * There should be a constraint on return arguments even if the expected
   type is Unit, otherwise errors will be missed

 * When the expected type is known, using the call completion results
   writer is pointless (and probably subtly wrong).

^KT-54742 Fixed
This commit is contained in:
pyos
2022-12-08 12:02:43 +01:00
committed by Dmitriy Novozhilov
parent 544cf386af
commit 803abfeba8
21 changed files with 241 additions and 538 deletions
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compiler/fir/analysis-tests/testData/resolve/expresssions/invoke/threeReceiversCorrect.fir.txt
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+2 -2
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@@ -31,9 +31,9 @@ FILE: threeReceiversCorrect.kt
(this@R|special/anonymous|, R|<local>/b|).R|/A.foo|.R|SubstitutionOverride<kotlin/Function1.invoke: R|kotlin/Unit|>|(R|<local>/c|)
}
)
^ R|/with|<R|B|, R|kotlin/Unit|>(R|<local>/b|, <L> = with@fun R|B|.<anonymous>(): R|kotlin/Unit| <inline=NoInline> {
R|/with|<R|B|, R|kotlin/Unit|>(R|<local>/b|, <L> = with@fun R|B|.<anonymous>(): R|kotlin/Unit| <inline=NoInline> {
(this@R|special/anonymous|, this@R|special/anonymous|).R|/A.foo|.R|SubstitutionOverride<kotlin/Function1.invoke: R|kotlin/Unit|>|(R|<local>/c|)
^ R|/with|<R|C|, R|kotlin/Unit|>(R|<local>/c|, <L> = with@fun R|C|.<anonymous>(): R|kotlin/Unit| <inline=NoInline> {
R|/with|<R|C|, R|kotlin/Unit|>(R|<local>/c|, <L> = with@fun R|C|.<anonymous>(): R|kotlin/Unit| <inline=NoInline> {
(this@R|special/anonymous|, this@R|special/anonymous|).R|/A.foo|.R|SubstitutionOverride<kotlin/Function1.invoke: R|kotlin/Unit|>|(this@R|special/anonymous|)
}
)