Doug Gregor fdcf45b497 [AST] Introduce factory methods to create CallExprs. ...

Introduce several new factory methods to create CallExprs, and hide
the constructor. The primary reason for this refactor is to start
moving clients over to the factory method that takes the call
arguments separately from the argument labels. Internally, it
repackages those arguments into a TupleExpr or ParenExpr (as
appropriate) so the result ASTs are the same. However, this will make
it easier for us to tease out the arguments themselves in the
implementation of SE-0111.

2016-07-25 13:27:35 -07:00

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