solidity/test/libsolidity/util/TestFileParser.cpp

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/*
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/>.
*/
#include <test/libsolidity/util/TestFileParser.h>
#include <test/libsolidity/util/BytesUtils.h>
#include <test/Common.h>
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#include <liblangutil/Common.h>
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#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/throw_exception.hpp>
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#include <fstream>
#include <memory>
#include <optional>
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#include <stdexcept>
using namespace solidity;
using namespace solidity::langutil;
using namespace solidity::frontend;
using namespace solidity::frontend::test;
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using namespace std;
using namespace soltest;
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char TestFileParser::Scanner::peek() const noexcept
{
if (std::distance(m_char, m_line.end()) < 2)
return '\0';
auto next = m_char;
std::advance(next, 1);
return *next;
}
vector<solidity::frontend::test::FunctionCall> TestFileParser::parseFunctionCalls(size_t _lineOffset)
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{
vector<FunctionCall> calls;
if (!accept(Token::EOS))
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{
assert(m_scanner.currentToken() == Token::Unknown);
m_scanner.scanNextToken();
while (!accept(Token::EOS))
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{
if (!accept(Token::Whitespace))
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{
FunctionCall call;
/// If this is not the first call in the test,
/// the last call to parseParameter could have eaten the
/// new line already. This could only be fixed with a one
/// token lookahead that checks parseParameter
/// if the next token is an identifier.
if (calls.empty())
expect(Token::Newline);
else
if (accept(Token::Newline, true))
m_lineNumber++;
try
{
if (accept(Token::Library, true))
{
expect(Token::Colon);
call.signature = m_scanner.currentLiteral();
expect(Token::Identifier);
call.isLibrary = true;
call.expectations.failure = false;
}
else
{
tie(call.signature, call.useCallWithoutSignature) = parseFunctionSignature();
if (accept(Token::Comma, true))
call.value = parseFunctionCallValue();
if (accept(Token::Colon, true))
call.arguments = parseFunctionCallArguments();
if (accept(Token::Newline, true))
{
call.displayMode = FunctionCall::DisplayMode::MultiLine;
m_lineNumber++;
}
call.arguments.comment = parseComment();
if (accept(Token::Newline, true))
{
call.displayMode = FunctionCall::DisplayMode::MultiLine;
m_lineNumber++;
}
if (accept(Token::Arrow, true))
{
call.omitsArrow = false;
call.expectations = parseFunctionCallExpectations();
if (accept(Token::Newline, true))
m_lineNumber++;
}
else
{
call.expectations.failure = false;
call.displayMode = FunctionCall::DisplayMode::SingleLine;
}
call.expectations.comment = parseComment();
if (call.signature == "constructor()")
call.isConstructor = true;
}
calls.emplace_back(std::move(call));
}
catch (Error const& _e)
{
throw Error{_e.type(), "Line " + to_string(_lineOffset + m_lineNumber) + ": " + _e.what()};
}
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}
}
}
return calls;
}
bool TestFileParser::accept(soltest::Token _token, bool const _expect)
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{
if (m_scanner.currentToken() != _token)
return false;
if (_expect)
return expect(_token);
return true;
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}
bool TestFileParser::expect(soltest::Token _token, bool const _advance)
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{
if (m_scanner.currentToken() != _token || m_scanner.currentToken() == Token::Invalid)
throw Error(
Error::Type::ParserError,
"Unexpected " + formatToken(m_scanner.currentToken()) + ": \"" +
m_scanner.currentLiteral() + "\". " +
"Expected \"" + formatToken(_token) + "\"."
);
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if (_advance)
m_scanner.scanNextToken();
return true;
}
pair<string, bool> TestFileParser::parseFunctionSignature()
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{
string signature;
bool hasName = false;
if (accept(Token::Identifier, false))
{
hasName = true;
signature = m_scanner.currentLiteral();
expect(Token::Identifier);
}
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signature += formatToken(Token::LParen);
expect(Token::LParen);
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string parameters;
if (!accept(Token::RParen, false))
parameters = parseIdentifierOrTuple();
while (accept(Token::Comma))
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{
parameters += formatToken(Token::Comma);
expect(Token::Comma);
parameters += parseIdentifierOrTuple();
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}
if (accept(Token::Arrow, true))
throw Error(Error::Type::ParserError, "Invalid signature detected: " + signature);
if (!hasName && !parameters.empty())
throw Error(Error::Type::ParserError, "Signatures without a name cannot have parameters: " + signature);
else
signature += parameters;
expect(Token::RParen);
signature += formatToken(Token::RParen);
return {signature, !hasName};
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}
FunctionValue TestFileParser::parseFunctionCallValue()
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{
try
{
u256 value{ parseDecimalNumber() };
Token token = m_scanner.currentToken();
if (token != Token::Ether && token != Token::Wei)
throw Error(Error::Type::ParserError, "Invalid value unit provided. Coins can be wei or ether.");
m_scanner.scanNextToken();
FunctionValueUnit unit = token == Token::Wei ? FunctionValueUnit::Wei : FunctionValueUnit::Ether;
return { (unit == FunctionValueUnit::Wei ? u256(1) : exp256(u256(10), u256(18))) * value, unit };
}
catch (std::exception const&)
{
throw Error(Error::Type::ParserError, "Ether value encoding invalid.");
}
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}
FunctionCallArgs TestFileParser::parseFunctionCallArguments()
{
FunctionCallArgs arguments;
auto param = parseParameter();
if (param.abiType.type == ABIType::None)
throw Error(Error::Type::ParserError, "No argument provided.");
arguments.parameters.emplace_back(param);
while (accept(Token::Comma, true))
arguments.parameters.emplace_back(parseParameter());
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return arguments;
}
FunctionCallExpectations TestFileParser::parseFunctionCallExpectations()
{
FunctionCallExpectations expectations;
auto param = parseParameter();
if (param.abiType.type == ABIType::None)
{
expectations.failure = false;
return expectations;
}
expectations.result.emplace_back(param);
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while (accept(Token::Comma, true))
expectations.result.emplace_back(parseParameter());
/// We have always one virtual parameter in the parameter list.
/// If its type is FAILURE, the expected result is also a REVERT etc.
if (expectations.result.at(0).abiType.type != ABIType::Failure)
expectations.failure = false;
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return expectations;
}
Parameter TestFileParser::parseParameter()
{
Parameter parameter;
if (accept(Token::Newline, true))
{
parameter.format.newline = true;
m_lineNumber++;
}
parameter.abiType = ABIType{ABIType::None, ABIType::AlignNone, 0};
bool isSigned = false;
if (accept(Token::Left, true))
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{
parameter.rawString += formatToken(Token::Left);
expect(Token::LParen);
parameter.rawString += formatToken(Token::LParen);
parameter.alignment = Parameter::Alignment::Left;
}
if (accept(Token::Right, true))
{
parameter.rawString += formatToken(Token::Right);
expect(Token::LParen);
parameter.rawString += formatToken(Token::LParen);
parameter.alignment = Parameter::Alignment::Right;
}
if (accept(Token::Sub, true))
{
parameter.rawString += formatToken(Token::Sub);
isSigned = true;
}
if (accept(Token::Boolean))
{
if (isSigned)
throw Error(Error::Type::ParserError, "Invalid boolean literal.");
parameter.abiType = ABIType{ABIType::Boolean, ABIType::AlignRight, 32};
string parsed = parseBoolean();
parameter.rawString += parsed;
parameter.rawBytes = BytesUtils::applyAlign(
parameter.alignment,
parameter.abiType,
BytesUtils::convertBoolean(parsed)
);
}
else if (accept(Token::HexNumber))
{
if (isSigned)
throw Error(Error::Type::ParserError, "Invalid hex number literal.");
parameter.abiType = ABIType{ABIType::Hex, ABIType::AlignRight, 32};
string parsed = parseHexNumber();
parameter.rawString += parsed;
parameter.rawBytes = BytesUtils::applyAlign(
parameter.alignment,
parameter.abiType,
BytesUtils::convertHexNumber(parsed)
);
}
else if (accept(Token::Hex, true))
{
if (isSigned)
throw Error(Error::Type::ParserError, "Invalid hex string literal.");
if (parameter.alignment != Parameter::Alignment::None)
throw Error(Error::Type::ParserError, "Hex string literals cannot be aligned or padded.");
string parsed = parseString();
parameter.rawString += "hex\"" + parsed + "\"";
parameter.rawBytes = BytesUtils::convertHexNumber(parsed);
parameter.abiType = ABIType{
ABIType::HexString, ABIType::AlignNone, parameter.rawBytes.size()
};
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}
else if (accept(Token::String))
{
if (isSigned)
throw Error(Error::Type::ParserError, "Invalid string literal.");
if (parameter.alignment != Parameter::Alignment::None)
throw Error(Error::Type::ParserError, "String literals cannot be aligned or padded.");
string parsed = parseString();
parameter.abiType = ABIType{ABIType::String, ABIType::AlignLeft, parsed.size()};
parameter.rawString += "\"" + parsed + "\"";
parameter.rawBytes = BytesUtils::applyAlign(
Parameter::Alignment::Left,
parameter.abiType,
BytesUtils::convertString(parsed)
);
}
else if (accept(Token::Number))
{
auto type = isSigned ? ABIType::SignedDec : ABIType::UnsignedDec;
parameter.abiType = ABIType{type, ABIType::AlignRight, 32};
string parsed = parseDecimalNumber();
parameter.rawString += parsed;
if (isSigned)
parsed = "-" + parsed;
parameter.rawBytes = BytesUtils::applyAlign(
parameter.alignment,
parameter.abiType,
BytesUtils::convertNumber(parsed)
);
}
else if (accept(Token::Failure, true))
{
if (isSigned)
throw Error(Error::Type::ParserError, "Invalid failure literal.");
parameter.abiType = ABIType{ABIType::Failure, ABIType::AlignRight, 0};
parameter.rawBytes = bytes{};
}
if (parameter.alignment != Parameter::Alignment::None)
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{
expect(Token::RParen);
parameter.rawString += formatToken(Token::RParen);
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}
return parameter;
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}
string TestFileParser::parseIdentifierOrTuple()
{
string identOrTuple;
auto parseArrayDimensions = [&]()
{
while (accept(Token::LBrack))
{
identOrTuple += formatToken(Token::LBrack);
expect(Token::LBrack);
if (accept(Token::Number))
identOrTuple += parseDecimalNumber();
identOrTuple += formatToken(Token::RBrack);
expect(Token::RBrack);
}
};
if (accept(Token::Identifier))
{
identOrTuple = m_scanner.currentLiteral();
expect(Token::Identifier);
parseArrayDimensions();
return identOrTuple;
}
expect(Token::LParen);
identOrTuple += formatToken(Token::LParen);
identOrTuple += parseIdentifierOrTuple();
while (accept(Token::Comma))
{
identOrTuple += formatToken(Token::Comma);
expect(Token::Comma);
identOrTuple += parseIdentifierOrTuple();
}
expect(Token::RParen);
identOrTuple += formatToken(Token::RParen);
parseArrayDimensions();
return identOrTuple;
}
string TestFileParser::parseBoolean()
{
string literal = m_scanner.currentLiteral();
expect(Token::Boolean);
return literal;
}
string TestFileParser::parseComment()
{
string comment = m_scanner.currentLiteral();
if (accept(Token::Comment, true))
return comment;
return string{};
}
string TestFileParser::parseDecimalNumber()
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{
string literal = m_scanner.currentLiteral();
expect(Token::Number);
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return literal;
}
string TestFileParser::parseHexNumber()
{
string literal = m_scanner.currentLiteral();
expect(Token::HexNumber);
return literal;
}
string TestFileParser::parseString()
{
string literal = m_scanner.currentLiteral();
expect(Token::String);
return literal;
}
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void TestFileParser::Scanner::readStream(istream& _stream)
{
std::string line;
while (std::getline(_stream, line))
m_line += line;
m_char = m_line.begin();
}
void TestFileParser::Scanner::scanNextToken()
{
using namespace langutil;
// Make code coverage happy.
assert(formatToken(Token::NUM_TOKENS) == "");
auto detectKeyword = [](std::string const& _literal = "") -> TokenDesc {
if (_literal == "true") return TokenDesc{Token::Boolean, _literal};
if (_literal == "false") return TokenDesc{Token::Boolean, _literal};
if (_literal == "ether") return TokenDesc{Token::Ether, _literal};
if (_literal == "wei") return TokenDesc{Token::Wei, _literal};
if (_literal == "left") return TokenDesc{Token::Left, _literal};
if (_literal == "library") return TokenDesc{Token::Library, _literal};
if (_literal == "right") return TokenDesc{Token::Right, _literal};
if (_literal == "hex") return TokenDesc{Token::Hex, _literal};
if (_literal == "FAILURE") return TokenDesc{Token::Failure, _literal};
return TokenDesc{Token::Identifier, _literal};
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};
auto selectToken = [this](Token _token, std::string const& _literal = "") -> TokenDesc {
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advance();
return make_pair(_token, !_literal.empty() ? _literal : formatToken(_token));
};
TokenDesc token = make_pair(Token::Unknown, "");
do
{
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switch(current())
{
case '/':
advance();
if (current() == '/')
token = selectToken(Token::Newline);
else
token = selectToken(Token::Invalid);
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break;
case '-':
if (peek() == '>')
{
advance();
token = selectToken(Token::Arrow);
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}
else
token = selectToken(Token::Sub);
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break;
case ':':
token = selectToken(Token::Colon);
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break;
case '#':
token = selectToken(Token::Comment, scanComment());
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break;
case ',':
token = selectToken(Token::Comma);
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break;
case '(':
token = selectToken(Token::LParen);
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break;
case ')':
token = selectToken(Token::RParen);
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break;
case '[':
token = selectToken(Token::LBrack);
break;
case ']':
token = selectToken(Token::RBrack);
break;
case '\"':
token = selectToken(Token::String, scanString());
break;
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default:
if (isIdentifierStart(current()))
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{
TokenDesc detectedToken = detectKeyword(scanIdentifierOrKeyword());
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token = selectToken(detectedToken.first, detectedToken.second);
}
else if (isDecimalDigit(current()))
{
if (current() == '0' && peek() == 'x')
{
advance();
advance();
token = selectToken(Token::HexNumber, "0x" + scanHexNumber());
}
else
token = selectToken(Token::Number, scanDecimalNumber());
}
else if (isWhiteSpace(current()))
token = selectToken(Token::Whitespace);
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else if (isEndOfLine())
token = make_pair(Token::EOS, "EOS");
else
throw Error(
Error::Type::ParserError,
"Unexpected character: '" + string{current()} + "'"
);
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break;
}
}
while (token.first == Token::Whitespace);
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m_currentToken = token;
}
string TestFileParser::Scanner::scanComment()
{
string comment;
advance();
while (current() != '#')
{
comment += current();
advance();
}
return comment;
}
string TestFileParser::Scanner::scanIdentifierOrKeyword()
{
string identifier;
identifier += current();
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while (langutil::isIdentifierPart(peek()))
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{
advance();
identifier += current();
}
return identifier;
}
string TestFileParser::Scanner::scanDecimalNumber()
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{
string number;
number += current();
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while (langutil::isDecimalDigit(peek()))
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{
advance();
number += current();
}
return number;
}
string TestFileParser::Scanner::scanHexNumber()
{
string number;
number += current();
while (langutil::isHexDigit(peek()))
{
advance();
number += current();
}
return number;
}
string TestFileParser::Scanner::scanString()
{
string str;
advance();
while (current() != '\"')
{
if (current() == '\\')
{
advance();
switch (current())
{
case '\\':
str += current();
advance();
break;
case 'n':
str += '\n';
advance();
break;
case 'r':
str += '\r';
advance();
break;
case 't':
str += '\t';
advance();
break;
case '0':
str += '\0';
advance();
break;
case 'x':
str += scanHexPart();
break;
default:
throw Error(Error::Type::ParserError, "Invalid or escape sequence found in string literal.");
}
}
else
{
str += current();
advance();
}
}
return str;
}
char TestFileParser::Scanner::scanHexPart()
{
advance(); // skip 'x'
char value{};
if (isdigit(current()))
value = current() - '0';
else if (tolower(current()) >= 'a' && tolower(current()) <= 'f')
value = tolower(current()) - 'a' + 10;
else
throw Error(Error::Type::ParserError, "\\x used with no following hex digits.");
advance();
if (current() == '"')
return value;
value <<= 4;
if (isdigit(current()))
value |= current() - '0';
else if (tolower(current()) >= 'a' && tolower(current()) <= 'f')
value |= tolower(current()) - 'a' + 10;
advance();
return value;
}