solidity/test/libsolidity/SolidityParser.cpp

/*
    This file is part of solidity.

    solidity 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.

    solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @author Christian <c@ethdev.com>
 * @date 2014
 * Unit tests for the solidity parser.
 */

#include <string>
#include <memory>
#include <libsolidity/parsing/Scanner.h>
#include <libsolidity/parsing/Parser.h>
#include <libsolidity/interface/ErrorReporter.h>
#include <test/Options.h>
#include <test/libsolidity/ErrorCheck.h>

using namespace std;

namespace dev
{
namespace solidity
{
namespace test
{

namespace
{
ASTPointer<ContractDefinition> parseText(std::string const& _source, ErrorList& _errors)
{
	ErrorReporter errorReporter(_errors);
	ASTPointer<SourceUnit> sourceUnit = Parser(errorReporter).parse(std::make_shared<Scanner>(CharStream(_source)));
	if (!sourceUnit)
		return ASTPointer<ContractDefinition>();
	for (ASTPointer<ASTNode> const& node: sourceUnit->nodes())
		if (ASTPointer<ContractDefinition> contract = dynamic_pointer_cast<ContractDefinition>(node))
			return contract;
	BOOST_FAIL("No contract found in source.");
	return ASTPointer<ContractDefinition>();
}

bool successParse(std::string const& _source)
{
	ErrorList errors;
	try
	{
		auto sourceUnit = parseText(_source, errors);
		if (!sourceUnit)
			return false;
	}
	catch (FatalError const& /*_exception*/)
	{
		if (Error::containsErrorOfType(errors, Error::Type::ParserError))
			return false;
	}
	if (Error::containsErrorOfType(errors, Error::Type::ParserError))
		return false;

	BOOST_CHECK(Error::containsOnlyWarnings(errors));
	return true;
}

Error getError(std::string const& _source)
{
	ErrorList errors;
	try
	{
		parseText(_source, errors);
	}
	catch (FatalError const& /*_exception*/)
	{
		// no-op
	}
	Error const* error = Error::containsErrorOfType(errors, Error::Type::ParserError);
	BOOST_REQUIRE(error);
	return *error;
}

void checkFunctionNatspec(
	FunctionDefinition const* _function,
	std::string const& _expectedDoc
)
{
	auto doc = _function->documentation();
	BOOST_CHECK_MESSAGE(doc != nullptr, "Function does not have Natspec Doc as expected");
	BOOST_CHECK_EQUAL(*doc, _expectedDoc);
}

}

#define CHECK_PARSE_ERROR(source, substring) \
do \
{\
	Error err = getError((source)); \
	BOOST_CHECK(searchErrorMessage(err, (substring))); \
}\
while(0)


BOOST_AUTO_TEST_SUITE(SolidityParser)

BOOST_AUTO_TEST_CASE(multiple_return_param_trailing_comma)
{
	char const* text = R"(
		contract test {
			function() returns (uint a, uint b,) {}
		}
	)";
	CHECK_PARSE_ERROR(text, "Unexpected trailing comma in parameter list.");
}

BOOST_AUTO_TEST_CASE(multiple_modifier_arg_trailing_comma)
{
	char const* text = R"(
		contract test {
			modifier modTest(uint a, uint b,) { _; }
			function(uint a) {}
		}
	)";
	CHECK_PARSE_ERROR(text, "Unexpected trailing comma in parameter list.");
}

BOOST_AUTO_TEST_CASE(multiple_event_arg_trailing_comma)
{
	char const* text = R"(
		contract test {
			event Test(uint a, uint b,);
			function(uint a) {}
		}
	)";
	CHECK_PARSE_ERROR(text, "Unexpected trailing comma in parameter list.");
}

BOOST_AUTO_TEST_CASE(two_exact_functions)
{
	char const* text = R"(
		contract test {
			function fun(uint a) returns(uint r) { return a; }
			function fun(uint a) returns(uint r) { return a; }
		}
	)";
	// with support of overloaded functions, during parsing,
	// we can't determine whether they match exactly, however
	// it will throw DeclarationError in following stage.
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(function_natspec_documentation)
{
	char const* text = R"(
		contract test {
			uint256 stateVar;
			/// This is a test function
			function functionName(bytes32 input) returns (bytes32 out) {}
		}
	)";
	BOOST_CHECK(successParse(text));
	ErrorList errors;
	ASTPointer<ContractDefinition> contract = parseText(text, errors);
	FunctionDefinition const* function = nullptr;
	auto functions = contract->definedFunctions();

	BOOST_REQUIRE_MESSAGE(function = functions.at(0), "Failed to retrieve function");
	checkFunctionNatspec(function, "This is a test function");
}

BOOST_AUTO_TEST_CASE(function_normal_comments)
{
	FunctionDefinition const* function = nullptr;
	char const* text = R"(
		contract test {
			uint256 stateVar;
			// We won't see this comment
			function functionName(bytes32 input) returns (bytes32 out) {}
		}
	)";
	BOOST_CHECK(successParse(text));
	ErrorList errors;
	ASTPointer<ContractDefinition> contract = parseText(text, errors);
	auto functions = contract->definedFunctions();
	BOOST_REQUIRE_MESSAGE(function = functions.at(0), "Failed to retrieve function");
	BOOST_CHECK_MESSAGE(function->documentation() == nullptr,
						"Should not have gotten a Natspecc comment for this function");
}

BOOST_AUTO_TEST_CASE(multiple_functions_natspec_documentation)
{
	FunctionDefinition const* function = nullptr;
	char const* text = R"(
		contract test {
			uint256 stateVar;
			/// This is test function 1
			function functionName1(bytes32 input) returns (bytes32 out) {}
			/// This is test function 2
			function functionName2(bytes32 input) returns (bytes32 out) {}
			// nothing to see here
			function functionName3(bytes32 input) returns (bytes32 out) {}
			/// This is test function 4
			function functionName4(bytes32 input) returns (bytes32 out) {}
		}
	)";
	BOOST_CHECK(successParse(text));
	ErrorList errors;
	ASTPointer<ContractDefinition> contract = parseText(text, errors);
	auto functions = contract->definedFunctions();

	BOOST_REQUIRE_MESSAGE(function = functions.at(0), "Failed to retrieve function");
	checkFunctionNatspec(function, "This is test function 1");

	BOOST_REQUIRE_MESSAGE(function = functions.at(1), "Failed to retrieve function");
	checkFunctionNatspec(function, "This is test function 2");

	BOOST_REQUIRE_MESSAGE(function = functions.at(2), "Failed to retrieve function");
	BOOST_CHECK_MESSAGE(function->documentation() == nullptr,
						"Should not have gotten natspec comment for functionName3()");

	BOOST_REQUIRE_MESSAGE(function = functions.at(3), "Failed to retrieve function");
	checkFunctionNatspec(function, "This is test function 4");
}

BOOST_AUTO_TEST_CASE(multiline_function_documentation)
{
	FunctionDefinition const* function = nullptr;
	char const* text = R"(
		contract test {
			uint256 stateVar;
			/// This is a test function
			/// and it has 2 lines
			function functionName1(bytes32 input) returns (bytes32 out) {}
		}
	)";
	BOOST_CHECK(successParse(text));
	ErrorList errors;
	ASTPointer<ContractDefinition> contract = parseText(text, errors);
	auto functions = contract->definedFunctions();
	BOOST_REQUIRE_MESSAGE(function = functions.at(0), "Failed to retrieve function");
	checkFunctionNatspec(function, "This is a test function\n"
						 " and it has 2 lines");
}

BOOST_AUTO_TEST_CASE(natspec_comment_in_function_body)
{
	FunctionDefinition const* function = nullptr;
	char const* text = R"(
		contract test {
			/// fun1 description
			function fun1(uint256 a) {
				var b;
				/// I should not interfere with actual natspec comments
				uint256 c;
				mapping(address=>bytes32) d;
				bytes7 name = "Solidity";
			}
			/// This is a test function
			/// and it has 2 lines
			function fun(bytes32 input) returns (bytes32 out) {}
		}
	)";
	BOOST_CHECK(successParse(text));
	ErrorList errors;
	ASTPointer<ContractDefinition> contract = parseText(text, errors);
	auto functions = contract->definedFunctions();

	BOOST_REQUIRE_MESSAGE(function = functions.at(0), "Failed to retrieve function");
	checkFunctionNatspec(function, "fun1 description");

	BOOST_REQUIRE_MESSAGE(function = functions.at(1), "Failed to retrieve function");
	checkFunctionNatspec(function, "This is a test function\n"
						 " and it has 2 lines");
}

BOOST_AUTO_TEST_CASE(natspec_docstring_between_keyword_and_signature)
{
	FunctionDefinition const* function = nullptr;
	char const* text = R"(
		contract test {
			uint256 stateVar;
			function ///I am in the wrong place
			fun1(uint256 a) {
				var b;
				/// I should not interfere with actual natspec comments
				uint256 c;
				mapping(address=>bytes32) d;
				bytes7 name = "Solidity";
			}
		}
	)";
	BOOST_CHECK(successParse(text));
	ErrorList errors;
	ASTPointer<ContractDefinition> contract = parseText(text, errors);
	auto functions = contract->definedFunctions();

	BOOST_REQUIRE_MESSAGE(function = functions.at(0), "Failed to retrieve function");
	BOOST_CHECK_MESSAGE(!function->documentation(),
						"Shouldn't get natspec docstring for this function");
}

BOOST_AUTO_TEST_CASE(natspec_docstring_after_signature)
{
	FunctionDefinition const* function = nullptr;
	char const* text = R"(
		contract test {
			uint256 stateVar;
			function fun1(uint256 a) {
				/// I should have been above the function signature
				var b;
				/// I should not interfere with actual natspec comments
				uint256 c;
				mapping(address=>bytes32) d;
				bytes7 name = "Solidity";
			}
		}
	)";
	BOOST_CHECK(successParse(text));
	ErrorList errors;
	ASTPointer<ContractDefinition> contract = parseText(text, errors);
	auto functions = contract->definedFunctions();

	BOOST_REQUIRE_MESSAGE(function = functions.at(0), "Failed to retrieve function");
	BOOST_CHECK_MESSAGE(!function->documentation(),
						"Shouldn't get natspec docstring for this function");
}

BOOST_AUTO_TEST_CASE(struct_definition)
{
	char const* text = R"(
		contract test {
			uint256 stateVar;
			struct MyStructName {
				address addr;
				uint256 count;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(mapping)
{
	char const* text = R"(
		contract test {
			mapping(address => bytes32) names;
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(mapping_in_struct)
{
	char const* text = R"(
		contract test {
			struct test_struct {
				address addr;
				uint256 count;
				mapping(bytes32 => test_struct) self_reference;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(mapping_to_mapping_in_struct)
{
	char const* text = R"(
		contract test {
			struct test_struct {
				address addr;
				mapping (uint64 => mapping (bytes32 => uint)) complex_mapping;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(variable_definition)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				var b;
				uint256 c;
				mapping(address=>bytes32) d;
				customtype varname;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(variable_definition_with_initialization)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				var b = 2;
				uint256 c = 0x87;
				mapping(address=>bytes32) d;
				bytes7 name = "Solidity";
				customtype varname;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(operator_expression)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				uint256 x = (1 + 4) || false && (1 - 12) + -9;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(complex_expression)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				uint256 x = (1 + 4).member(++67)[a/=9] || true;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(exp_expression)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				uint256 x = 3 ** a;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(while_loop)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				while (true) { uint256 x = 1; break; continue; } x = 9;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(for_loop_vardef_initexpr)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				for (uint256 i = 0; i < 10; i++) {
					uint256 x = i; break; continue;
				}
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(for_loop_simple_initexpr)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				uint256 i =0;
				for (i = 0; i < 10; i++) {
					uint256 x = i; break; continue;
				}
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(for_loop_simple_noexpr)
{
	char const* text = R"(
		contract test {
				function fun(uint256 a) {
					uint256 i =0;
					for (;;) {
						uint256 x = i; break; continue;
					}
				}
			}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(for_loop_single_stmt_body)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				uint256 i = 0;
				for (i = 0; i < 10; i++)
					continue;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(if_statement)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) {
				if (a >= 8) { return 2; } else { var b = 7; }
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(else_if_statement)
{
	char const* text = R"(
		contract test {
			function fun(uint256 a) returns (address b) {
				if (a < 0) b = 0x67; else if (a == 0) b = 0x12; else b = 0x78;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(statement_starting_with_type_conversion)
{
	char const* text = R"(
		contract test {
			function fun() {
				uint64(2);
				uint64[7](3);
				uint64[](3);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(type_conversion_to_dynamic_array)
{
	char const* text = R"(
		contract test {
			function fun() {
				var x = uint64[](3);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(import_directive)
{
	char const* text = R"(
		import "abc";
		contract test {
			function fun() {
				uint64(2);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(multiple_contracts)
{
	char const* text = R"(
		contract test {
			function fun() {
				uint64(2);
			}
		}
		contract test2 {
			function fun() {
				uint64(2);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(multiple_contracts_and_imports)
{
	char const* text = R"(
		import "abc";
		contract test {
			function fun() {
				uint64(2);
			}
		}
		import "def";
		contract test2 {
			function fun() {
				uint64(2);
			}
		}
		import "ghi";
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(contract_inheritance)
{
	char const* text = R"(
		contract base {
			function fun() {
				uint64(2);
			}
		}
		contract derived is base {
			function fun() {
				uint64(2);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(contract_multiple_inheritance)
{
	char const* text = R"(
		contract base {
			function fun() {
				uint64(2);
			}
		}
		contract derived is base, nonExisting {
			function fun() {
				uint64(2);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(contract_multiple_inheritance_with_arguments)
{
	char const* text = R"(
		contract base {
			function fun() {
				uint64(2);
			}
		}
		contract derived is base(2), nonExisting("abc", "def", base.fun()) {
			function fun() {
				uint64(2);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(placeholder_in_function_context)
{
	char const* text = R"(
		contract c {
			function fun() returns (uint r) {
				var _ = 8;
				return _ + 1;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(modifier)
{
	char const* text = R"(
		contract c {
			modifier mod { if (msg.sender == 0) _; }
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(modifier_arguments)
{
	char const* text = R"(
		contract c {
			modifier mod(address a) { if (msg.sender == a) _; }
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(modifier_invocation)
{
	char const* text = R"(
		contract c {
			modifier mod1(uint a) { if (msg.sender == a) _; }
			modifier mod2 { if (msg.sender == 2) _; }
			function f() mod1(7) mod2 { }
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(fallback_function)
{
	char const* text = R"(
		contract c {
			function() { }
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(event)
{
	char const* text = R"(
		contract c {
			event e();
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(event_arguments)
{
	char const* text = R"(
		contract c {
			event e(uint a, bytes32 s);
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(event_arguments_indexed)
{
	char const* text = R"(
		contract c {
			event e(uint a, bytes32 indexed s, bool indexed b);
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(visibility_specifiers)
{
	char const* text = R"(
		contract c {
			uint private a;
			uint internal b;
			uint public c;
			uint d;
			function f() {}
			function f_priv() private {}
			function f_public() public {}
			function f_internal() internal {}
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(multiple_visibility_specifiers)
{
	char const* text = R"(
		contract c {
			uint private internal a;
		})";
	CHECK_PARSE_ERROR(text, "Visibility already specified as \"private\".");
	text = R"(
		contract c {
			function f() private external {}
		})";
	CHECK_PARSE_ERROR(text, "Visibility already specified as \"private\".");
}

BOOST_AUTO_TEST_CASE(literal_constants_with_ether_subdenominations)
{
	char const* text = R"(
		contract c {
			function c ()
			{
				 a = 1 wei;
				 b = 2 szabo;
				 c = 3 finney;
				 b = 4 ether;
			}
			uint256 a;
			uint256 b;
			uint256 c;
			uint256 d;
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(literal_constants_with_ether_subdenominations_in_expressions)
{
	char const* text = R"(
		contract c {
			function c ()
			{
				 a = 1 wei * 100 wei + 7 szabo - 3;
			}
			uint256 a;
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(enum_valid_declaration)
{
	char const* text = R"(
		contract c {
			enum validEnum { Value1, Value2, Value3, Value4 }
			function c ()
			{
				a = foo.Value3;
			}
			uint256 a;
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(external_function)
{
	char const* text = R"(
		contract c {
			function x() external {}
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(arrays_in_storage)
{
	char const* text = R"(
		contract c {
			uint[10] a;
			uint[] a2;
			struct x { uint[2**20] b; y[0] c; }
			struct y { uint d; mapping(uint=>x)[] e; }
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(arrays_in_events)
{
	char const* text = R"(
		contract c {
			event e(uint[10] a, bytes7[8] indexed b, c[3] x);
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(arrays_in_expressions)
{
	char const* text = R"(
		contract c {
			function f() { c[10] a = 7; uint8[10 * 2] x; }
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(multi_arrays)
{
	char const* text = R"(
		contract c {
			mapping(uint => mapping(uint => int8)[8][][9])[] x;
		})";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(keyword_is_reserved)
{
	auto keywords = {
		"abstract",
		"after",
		"case",
		"catch",
		"default",
		"final",
		"in",
		"inline",
		"let",
		"match",
		"null",
		"of",
		"relocatable",
		"static",
		"switch",
		"try",
		"type",
		"typeof"
	};

	for (const auto& keyword: keywords)
	{
		auto text = std::string("contract ") + keyword + " {}";
		CHECK_PARSE_ERROR(text.c_str(), "Expected identifier but got reserved keyword");
	}
}

BOOST_AUTO_TEST_CASE(location_specifiers_for_params)
{
	char const* text = R"(
		contract Foo {
			function f(uint[] storage constant x, uint[] memory y) { }
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(location_specifiers_for_locals)
{
	char const* text = R"(
		contract Foo {
			function f() {
				uint[] storage x;
				uint[] memory y;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(library_simple)
{
	char const* text = R"(
		library Lib {
			function f() { }
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(member_access_parser_ambiguity)
{
	char const* text = R"(
		contract C {
			struct S { uint a; uint b; uint[][][] c; }
			function f() {
				C.S x;
				C.S memory y;
				C.S[10] memory z;
				C.S[10](x);
				x.a = 2;
				x.c[1][2][3] = 9;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(using_for)
{
	char const* text = R"(
		contract C {
			struct s { uint a; }
			using LibraryName for uint;
			using Library2 for *;
			using Lib for s;
			function f() {
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(complex_import)
{
	char const* text = R"(
		import "abc" as x;
		import * as x from "abc";
		import {a as b, c as d, f} from "def";
		contract x {}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(from_is_not_keyword)
{
	// "from" is not a keyword although it is used as a keyword in import directives.
	char const* text = R"(
		contract from {
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(inline_array_declaration)
{
	char const* text = R"(
		contract c {
			uint[] a;
			function f() returns (uint, uint) {
				a = [1,2,3];
				return (a[3], [2,3,4][0]);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(conditional_true_false_literal)
{
	char const* text = R"(
		contract A {
			function f() {
				uint x = true ? 1 : 0;
				uint y = false ? 0 : 1;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(conditional_with_constants)
{
	char const* text = R"(
		contract A {
			function f() {
				uint x = 3 > 0 ? 3 : 0;
				uint y = (3 > 0) ? 3 : 0;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(conditional_with_variables)
{
	char const* text = R"(
		contract A {
			function f() {
				uint x = 3;
				uint y = 1;
				uint z = (x > y) ? x : y;
				uint w = x > y ? x : y;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(conditional_multiple)
{
	char const* text = R"(
		contract A {
			function f() {
				uint x = 3 < 0 ? 2 > 1 ? 2 : 1 : 7 > 2 ? 7 : 6;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(conditional_with_assignment)
{
	char const* text = R"(
		contract A {
			function f() {
				uint y = 1;
				uint x = 3 < 0 ? x = 3 : 6;
				true ? x = 3 : 4;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(recursion_depth1)
{
	string text("contract C { bytes");
	for (size_t i = 0; i < 30000; i++)
		text += "[";
	CHECK_PARSE_ERROR(text.c_str(), "Maximum recursion depth reached during parsing");
}

BOOST_AUTO_TEST_CASE(recursion_depth2)
{
	string text("contract C { function f() {");
	for (size_t i = 0; i < 30000; i++)
		text += "{";
	CHECK_PARSE_ERROR(text, "Maximum recursion depth reached during parsing");
}

BOOST_AUTO_TEST_CASE(recursion_depth3)
{
	string text("contract C { function f() { uint x = f(");
	for (size_t i = 0; i < 30000; i++)
		text += "(";
	CHECK_PARSE_ERROR(text, "Maximum recursion depth reached during parsing");
}

BOOST_AUTO_TEST_CASE(recursion_depth4)
{
	string text("contract C { function f() { uint a;");
	for (size_t i = 0; i < 30000; i++)
		text += "(";
	text += "a";
	for (size_t i = 0; i < 30000; i++)
		text += "++)";
	text += "}}";
	CHECK_PARSE_ERROR(text, "Maximum recursion depth reached during parsing");
}

BOOST_AUTO_TEST_CASE(declaring_fixed_and_ufixed_variables)
{
	char const* text = R"(
		contract A {
			fixed40x40 storeMe;
			function f(ufixed x, fixed32x32 y) {
				ufixed8x8 a;
				fixed b;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(declaring_fixed_literal_variables)
{
	char const* text = R"(
		contract A {
			fixed40x40 pi = 3.14;
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(function_type_in_expression)
{
	char const* text = R"(
		contract test {
			function f(uint x, uint y) returns (uint a) {}
			function g() {
				function (uint, uint) internal returns (uint) f1 = f;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(function_type_as_storage_variable)
{
	char const* text = R"(
		contract test {
			function (uint, uint) internal returns (uint) f1;
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(function_type_as_storage_variable_with_assignment)
{
	char const* text = R"(
		contract test {
			function f(uint x, uint y) returns (uint a) {}
			function (uint, uint) internal returns (uint) f1 = f;
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(function_type_in_struct)
{
	char const* text = R"(
		contract test {
			struct S {
				function (uint x, uint y) internal returns (uint a) f;
				function (uint, uint) external returns (uint) g;
				uint d;
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(function_type_as_parameter)
{
	char const* text = R"(
		contract test {
			function f(function(uint) external returns (uint) g) internal returns (uint a) {
				return g(1);
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(calling_function)
{
	char const* text = R"(
		contract test {
			function f() {
				function() returns(function() returns(function() returns(function() returns(uint)))) x;
				uint y;
				y = x()()()();
			}
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_CASE(mapping_and_array_of_functions)
{
	char const* text = R"(
		contract test {
			mapping (address => function() internal returns (uint)) a;
			mapping (address => function() external) b;
			mapping (address => function() external[]) c;
			function() external[] d;
		}
	)";
	BOOST_CHECK(successParse(text));
}

BOOST_AUTO_TEST_SUITE_END()

}
}
} // end namespaces