trait EtaExpansion extends AnyRef
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def
etaExpand(unit: Global.CompilationUnit, tree: Global.Tree, typer: Analyzer.Typer): Global.Tree
Expand partial method application
p.f(es_1)...(es_n)
.Expand partial method application
p.f(es_1)...(es_n)
.We expand this to the following block, which evaluates the target of the application and its supplied arguments if needed (they are not stable), and then wraps a Function that abstracts over the missing arguments.
{ private synthetic val eta$f = p.f // if p is not stable ... private synthetic val eta$e_i = e_i // if e_i is not stable ... (ps_1 => ... => ps_m => eta$f([es_1])...([es_m])(ps_1)...(ps_m)) }
This is called from instantiateToMethodType after type checking
tree
, and we realize we have a method type, where a function type (builtin or SAM) is expected. -
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