Richard Smith 1ae5fe0cd5 Provide the callee expression to the Call node. (#3291) ...

Track the callee expression in full, instead of only tracking the
callee's FunctionId. This results in the `name_reference` denoting the
function actually being used.

Lowering now propagates a `llvm::Function*` as the value associated with
expressions of type `<function>`.

We were not creating `NameReference` node for names produced by member
access into a namespace, such as the second name in
`Namespace.Function`, which caused lowering of calls to such names to
fail. This is now fixed, but the resulting `NameReference` node only
refers to the name and the lookup result, not to the `Namespace.`
qualifier. We'll need to decide how to fit a third operand into that
node (perhaps we can stop storing the `name_id`, since it can be derived
from the lookup result) but for now the qualifier is not tracked.

2023-10-13 22:06:23 +00:00

..

simple.carbon

Provide the callee expression to the Call node. (#3291)

2023-10-13 22:06:23 +00:00