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Diffstat (limited to 'src/dotty/tools/dotc/typer/Applications.scala')
| -rw-r--r-- | src/dotty/tools/dotc/typer/Applications.scala | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/dotty/tools/dotc/typer/Applications.scala b/src/dotty/tools/dotc/typer/Applications.scala index 6e78a570d..7a742112b 100644 --- a/src/dotty/tools/dotc/typer/Applications.scala +++ b/src/dotty/tools/dotc/typer/Applications.scala @@ -553,6 +553,16 @@ trait Applications extends Compatibility { self: Typer with Dynamic => // a modified tree but this would be more convoluted and less efficient. if (proto.isTupled) proto = proto.tupled + // If some of the application's arguments are function literals without explicitly declared + // parameter types, and the expected type is a value type, relate the + // normalized result type of the application with the expected type through `<:<`. + // This can add more constraints which help sharpen the inferred parameter + // types for the argument function literal(s). + // This tweak is needed to make i1348 compile. + if (tree.args.exists(untpd.isFunctionWithImplicitParamType(_))) + if (!constrainResult(fun1.tpe.widen, proto.derivedFunProto(resultType = pt))) + typr.println(i"result failure for $tree with type ${fun1.tpe.widen}, expected = $pt") + fun1.tpe match { case ErrorType => tree.withType(ErrorType) case TryDynamicCallType => |