Solidity scanner and some unit tests.

The scanner is a modified version of the v8 javascript scanner.

2 files changed, 140 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6936addb..b4d0e46b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,7 @@ target_link_libraries(testeth ethereum)
 target_link_libraries(testeth ethcore)
 target_link_libraries(testeth secp256k1)
 target_link_libraries(testeth gmp)
+target_link_libraries(testeth solidity)
 target_link_libraries(testeth ${CRYPTOPP_LS})
 
 if ("${TARGET_PLATFORM}" STREQUAL "w64")
diff --git a/solidityScanner.cpp b/solidityScanner.cpp
new file mode 100644
index 00000000..afbcdffa
--- /dev/null
+++ b/solidityScanner.cpp
@@ -0,0 +1,139 @@
+/*
+    This file is part of cpp-ethereum.
+
+    cpp-ethereum 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.
+
+    cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @author Christian <c@ethdev.com>
+ * @date 2014
+ * Unit tests for the solidity scanner.
+ */
+
+#include <libsolidity/Scanner.h>
+#include <boost/test/unit_test.hpp>
+
+namespace dev {
+namespace solidity {
+namespace test {
+
+BOOST_AUTO_TEST_SUITE(solidity)
+
+BOOST_AUTO_TEST_CASE(smoke_test)
+{
+    Scanner scanner(CharStream("function break;765  \t  \"string1\",'string2'\nidentifier1"));
+    BOOST_CHECK_EQUAL(scanner.getCurrentToken(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::FUNCTION);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::BREAK);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::SEMICOLON);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::NUMBER);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "765");
+    BOOST_CHECK_EQUAL(scanner.next(), Token::STRING);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "string1");
+    BOOST_CHECK_EQUAL(scanner.next(), Token::COMMA);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::STRING);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "string2");
+    BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "identifier1");
+    BOOST_CHECK_EQUAL(scanner.next(), Token::EOS);
+}
+
+BOOST_AUTO_TEST_CASE(string_escapes)
+{
+    Scanner scanner(CharStream("  { \"a\\x61\""));
+    BOOST_CHECK_EQUAL(scanner.getCurrentToken(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::LBRACE);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::STRING);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "aa");
+}
+
+BOOST_AUTO_TEST_CASE(string_escapes_with_zero)
+{
+    Scanner scanner(CharStream("  { \"a\\x61\\x00abc\""));
+    BOOST_CHECK_EQUAL(scanner.getCurrentToken(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::LBRACE);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::STRING);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), std::string("aa\0abc", 6));
+}
+
+BOOST_AUTO_TEST_CASE(string_escape_illegal)
+{
+    Scanner scanner(CharStream(" bla \"\\x6rf\" (illegalescape)"));
+    BOOST_CHECK_EQUAL(scanner.getCurrentToken(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "");
+    // TODO recovery from illegal tokens should be improved
+    BOOST_CHECK_EQUAL(scanner.next(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::EOS);
+}
+
+BOOST_AUTO_TEST_CASE(hex_numbers)
+{
+    Scanner scanner(CharStream("var x = 0x765432536763762734623472346;"));
+    BOOST_CHECK_EQUAL(scanner.getCurrentToken(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::VAR);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::ASSIGN);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::NUMBER);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLiteral(), "0x765432536763762734623472346");
+    BOOST_CHECK_EQUAL(scanner.next(), Token::SEMICOLON);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::EOS);
+}
+
+BOOST_AUTO_TEST_CASE(locations)
+{
+    Scanner scanner(CharStream("function_identifier has ; -0x743/*comment*/\n ident //comment"));
+    BOOST_CHECK_EQUAL(scanner.getCurrentToken(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().beg_pos, 0);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end_pos, 19);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().beg_pos, 20);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end_pos, 23);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::SEMICOLON);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().beg_pos, 24);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end_pos, 25);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::SUB);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().beg_pos, 26);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end_pos, 27);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::NUMBER);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().beg_pos, 27);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end_pos, 32);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().beg_pos, 45);
+    BOOST_CHECK_EQUAL(scanner.getCurrentLocation().end_pos, 50);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::EOS);
+}
+
+BOOST_AUTO_TEST_CASE(ambiguities)
+{
+    // test scanning of some operators which need look-ahead
+    Scanner scanner(CharStream("<=""<""+ +=a++ =>""<<"));
+    BOOST_CHECK_EQUAL(scanner.getCurrentToken(), Token::ILLEGAL);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::LTE);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::LT);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::ADD);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::ASSIGN_ADD);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::IDENTIFIER);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::INC);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::ARROW);
+    BOOST_CHECK_EQUAL(scanner.next(), Token::SHL);
+}
+
+
+BOOST_AUTO_TEST_SUITE_END()
+
+} } } // end namespaces