</pre>

<pre>
*Point
*[4]int
</pre>

<h3 id="Function_types">Function types</h3>

<p>
A function type denotes the set of all functions with the same parameter
and result types. The value of an uninitialized variable of function type
is <code>nil</code>.
</p>

<pre class="ebnf">
FunctionType   = "func" Signature .
Signature      = Parameters [ Result ] .

  auto module = op->getParentOfType<ModuleOp>();
  auto function =
      dyn_cast_or_null<func::FuncOp>(SymbolTable::lookupSymbolIn(module, func));
  FunctionType function_ty = function.getFunctionType();

  for (auto arg_in : llvm::zip(args, function_ty.getInputs())) {
    if (std::get<0>(arg_in).getType() != std::get<1>(arg_in)) {
      // Argument type and input type mismatch.
      return false;
    }
  }