Ichthyostega
abeca98233
The choice to rely on strictly typed functor bindings for the Node operation bears the danger to produce ''template bloat'' — it would be dangerous to add further functions to the Port-API naïvely; espeically simple information functions will likely not depend on the full type information. A remedy to explore would be to exploit properties marked into the Port's `ProcID` as key for a dispatcher hashtable; assuming that the `NodeBuilder` will be responsible for registering the corresponding implementation functions, such a solution could even be somewhat type-safe, as long as the semantics of the ProcID are maintained correctly.
101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
/*
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FunHashDispatch(Test) - verify dispatching of opaque functions keyed by hash-ID
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Copyright (C)
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2025, Hermann Vosseler <Ichthyostega@web.de>
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**Lumiera** is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version. See the file COPYING for further details.
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* *****************************************************************/
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/** @file fun-hash-dispatch-test.cpp
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** unit test \ref FunHashDispatch_test
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*/
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#include "lib/test/run.hpp"
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#include "lib/test/test-helper.hpp"
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#include "lib/fun-hash-dispatch.hpp"
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#include "lib/format-obj.hpp"
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#include "lib/test/diagnostic-output.hpp"////////////////////TODO
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//#include "lib/util.hpp"
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//#include <cstdlib>
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#include <string>
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namespace lib {
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namespace test{
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// using util::isSameAdr;
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// using std::rand;
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using util::toString;
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using std::string;
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// namespace error = lumiera::error;
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// using error::LUMIERA_ERROR_FATAL;
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// using error::LUMIERA_ERROR_STATE;
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namespace {
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// #define Type(_EXPR_) lib::test::showType<decltype(_EXPR_)>()
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}
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/***********************************************************************************//**
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* @test Verify generic helper to provide a hash-based function dispatch table.
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* @see fun-hash-dispatch.hpp
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* @see NodeMeta_test
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*/
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class FunHashDispatch_test
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: public Test
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{
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void
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run (Arg)
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{
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FunHashDispatch<string(int)> dispatch;
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auto one = [](int i) { return toString(i); };
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auto two = [](int i) { return string(size_t(i),'*'); };
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auto* res = dispatch.enrol (1, one);
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CHECK (res == one);
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CHECK (dispatch.contains(1));
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SHOW_EXPR(dispatch.select(1)(42));
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CHECK (dispatch.select(1)(42) == "42"_expect);
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dispatch.enrol (2, two);
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CHECK (dispatch.contains(1));
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CHECK (dispatch.contains(2));
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SHOW_EXPR(dispatch.select(1)(5));
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CHECK (dispatch.select(1)(5) == "5"_expect);
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SHOW_EXPR(dispatch.select(2)(5));
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CHECK (dispatch.select(2)(5) == "*****"_expect);
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res = dispatch.enrol (1,two);
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CHECK (res == one);
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res = dispatch.enrol (3,two);
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CHECK (res == two);
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CHECK (dispatch.select(3)(2) == "**"_expect);
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VERIFY_FAIL ("Expect function for given hash"
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, dispatch.select(5) );
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}
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};
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/** Register this test class... */
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LAUNCHER (FunHashDispatch_test, "unit common");
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}} // namespace lib::test
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