Implemented ParserStateDeductor which is used to deduce the current ParserState given the Type signature extracted from a ParserScope.

1 files changed, 77 insertions, 0 deletions

diff --git a/test/core/parser/ParserStateTest.cpp b/test/core/parser/ParserStateTest.cpp
new file mode 100644
index 0000000..91d8dcd
--- /dev/null
+++ b/test/core/parser/ParserStateTest.cpp
@@ -0,0 +1,77 @@
+/*
+    Ousía
+    Copyright (C) 2014, 2015  Benjamin Paaßen, Andreas Stöckel
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <gtest/gtest.h>
+
+#include <core/common/Rtti.hpp>
+#include <core/parser/ParserState.hpp>
+
+namespace ousia {
+
+static const Rtti t1;
+static const Rtti t2;
+static const Rtti t3;
+static const Rtti t4;
+static const Rtti t5;
+
+static const ParserState s1 = ParserStateBuilder().createdNodeType(&t1);
+static const ParserState s2a =
+    ParserStateBuilder().parent(&s1).createdNodeType(&t2);
+static const ParserState s2b =
+    ParserStateBuilder().parent(&s1).createdNodeType(&t2);
+static const ParserState s3 =
+    ParserStateBuilder().parents({&s2a, &s1}).createdNodeType(&t3);
+static const ParserState s4 =
+    ParserStateBuilder().parent(&s3).createdNodeType(&t4);
+static const ParserState s5 =
+    ParserStateBuilder().parent(&s2b).createdNodeType(&t5);
+
+TEST(ParserStateDeductor, deduce)
+{
+	using Result = std::vector<const ParserState *>;
+	using Signature = std::vector<const Rtti *>;
+	std::vector<const ParserState *> states{&s1, &s2a, &s2b, &s3, &s4, &s5};
+
+	// Should not crash on empty signature
+	ASSERT_EQ(Result{}, ParserStateDeductor(Signature{}, states).deduce());
+
+	// Try repeating signature elements
+	ASSERT_EQ(Result({&s1}),
+	          ParserStateDeductor(Signature({&t1}), states).deduce());
+	ASSERT_EQ(Result({&s1}),
+	          ParserStateDeductor(Signature({&t1, &t1}), states).deduce());
+	ASSERT_EQ(Result({&s1}),
+	          ParserStateDeductor(Signature({&t1, &t1, &t1}), states).deduce());
+
+	// Go to another state
+	ASSERT_EQ(Result({&s2a, &s2b}),
+	          ParserStateDeductor(Signature({&t1, &t1, &t2}), states).deduce());
+	ASSERT_EQ(Result({&s4}),
+	          ParserStateDeductor(Signature({&t1, &t3, &t4}), states).deduce());
+
+	// Skip one state
+	ASSERT_EQ(Result({&s4}),
+	          ParserStateDeductor(Signature({&t2, &t4}), states).deduce());
+
+	// Impossible signature
+	ASSERT_EQ(Result({}),
+	          ParserStateDeductor(Signature({&t4, &t5}), states).deduce());
+
+}
+}
+