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Parsing function calls.

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This commit is contained in:
chriseth 2017-02-01 21:20:21 +01:00
parent 5d584aded8
commit 49a919b3e0
5 changed files with 69 additions and 37 deletions
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4
libsolidity/inlineasm/AsmCodeGen.cpp
View File

@ -190,6 +190,10 @@ public:
}
(*this)(_instr.instruction);
}
void operator()(assembly::FunctionCall const&)
{
solAssert(false, "Function call not removed during desugaring phase.");
}
void operator()(Label const& _label)
{
m_state.assembly.setSourceLocation(_label.location);

4
libsolidity/inlineasm/AsmData.h
View File

@ -49,13 +49,15 @@ struct Assignment { SourceLocation location; Identifier variableName; };
struct FunctionalAssignment;
struct VariableDeclaration;
struct FunctionDefinition;
struct FunctionCall;
struct Block;
using Statement = boost::variant<Instruction, Literal, Label, Assignment, Identifier, FunctionalAssignment, FunctionalInstruction, VariableDeclaration, FunctionDefinition, Block>;
using Statement = boost::variant<Instruction, Literal, Label, Assignment, Identifier, FunctionalAssignment, FunctionCall, FunctionalInstruction, VariableDeclaration, FunctionDefinition, Block>;
/// Functional assignment ("x := mload(20)", expects push-1-expression on the right hand
/// side and requires x to occupy exactly one stack slot.
struct FunctionalAssignment { SourceLocation location; Identifier variableName; std::shared_ptr<Statement> value; };
/// Functional instruction, e.g. "mul(mload(20), add(2, x))"
struct FunctionalInstruction { SourceLocation location; Instruction instruction; std::vector<Statement> arguments; };
struct FunctionCall { SourceLocation location; Identifier functionName; std::vector<Statement> arguments; };
/// Block-scope variable declaration ("let x := mload(20)"), non-hoisted
struct VariableDeclaration { SourceLocation location; std::string name; std::shared_ptr<Statement> value; };
/// Block that creates a scope (frees declared stack variables)

91
libsolidity/inlineasm/AsmParser.cpp
View File

@ -257,46 +257,67 @@ assembly::FunctionDefinition Parser::parseFunctionDefinition()
return funDef;
}
FunctionalInstruction Parser::parseFunctionalInstruction(assembly::Statement&& _instruction)
assembly::Statement Parser::parseFunctionalInstruction(assembly::Statement&& _instruction)
{
if (_instruction.type() != typeid(Instruction))
fatalParserError("Assembly instruction required in front of \"(\")");
FunctionalInstruction ret;
ret.instruction = std::move(boost::get<Instruction>(_instruction));
ret.location = ret.instruction.location;
solidity::Instruction instr = ret.instruction.instruction;
InstructionInfo instrInfo = instructionInfo(instr);
if (solidity::Instruction::DUP1 <= instr && instr <= solidity::Instruction::DUP16)
fatalParserError("DUPi instructions not allowed for functional notation");
if (solidity::Instruction::SWAP1 <= instr && instr <= solidity::Instruction::SWAP16)
fatalParserError("SWAPi instructions not allowed for functional notation");
expectToken(Token::LParen);
unsigned args = unsigned(instrInfo.args);
for (unsigned i = 0; i < args; ++i)
if (_instruction.type() == typeid(Instruction))
{
ret.arguments.emplace_back(parseExpression());
if (i != args - 1)
FunctionalInstruction ret;
ret.instruction = std::move(boost::get<Instruction>(_instruction));
ret.location = ret.instruction.location;
solidity::Instruction instr = ret.instruction.instruction;
InstructionInfo instrInfo = instructionInfo(instr);
if (solidity::Instruction::DUP1 <= instr && instr <= solidity::Instruction::DUP16)
fatalParserError("DUPi instructions not allowed for functional notation");
if (solidity::Instruction::SWAP1 <= instr && instr <= solidity::Instruction::SWAP16)
fatalParserError("SWAPi instructions not allowed for functional notation");
expectToken(Token::LParen);
unsigned args = unsigned(instrInfo.args);
for (unsigned i = 0; i < args; ++i)
{
if (m_scanner->currentToken() != Token::Comma)
fatalParserError(string(
"Expected comma (" +
instrInfo.name +
" expects " +
boost::lexical_cast<string>(args) +
" arguments)"
));
else
m_scanner->next();
ret.arguments.emplace_back(parseExpression());
if (i != args - 1)
{
if (m_scanner->currentToken() != Token::Comma)
fatalParserError(string(
"Expected comma (" +
instrInfo.name +
" expects " +
boost::lexical_cast<string>(args) +
" arguments)"
));
else
m_scanner->next();
}
}
ret.location.end = endPosition();
if (m_scanner->currentToken() == Token::Comma)
fatalParserError(
string("Expected ')' (" + instrInfo.name + " expects " + boost::lexical_cast<string>(args) + " arguments)")
);
expectToken(Token::RParen);
return ret;
}
ret.location.end = endPosition();
if (m_scanner->currentToken() == Token::Comma)
fatalParserError(
string("Expected ')' (" + instrInfo.name + " expects " + boost::lexical_cast<string>(args) + " arguments)")
);
expectToken(Token::RParen);
return ret;
else if (_instruction.type() == typeid(Identifier))
{
FunctionCall ret;
ret.functionName = std::move(boost::get<Identifier>(_instruction));
ret.location = ret.functionName.location;
expectToken(Token::LParen);
while (m_scanner->currentToken() != Token::RParen)
{
ret.arguments.emplace_back(parseExpression());
if (m_scanner->currentToken() == Token::RParen)
break;
expectToken(Token::Comma);
}
ret.location.end = endPosition();
expectToken(Token::RParen);
return ret;
}
else
fatalParserError("Assembly instruction or function name required in front of \"(\")");
return {};
}
string Parser::expectAsmIdentifier()

2
libsolidity/inlineasm/AsmParser.h
View File

@ -68,7 +68,7 @@ protected:
Statement parseElementaryOperation(bool _onlySinglePusher = false);
VariableDeclaration parseVariableDeclaration();
FunctionDefinition parseFunctionDefinition();
FunctionalInstruction parseFunctionalInstruction(Statement&& _instruction);
Statement parseFunctionalInstruction(Statement&& _instruction);
std::string expectAsmIdentifier();
};

5
test/libsolidity/InlineAssembly.cpp
View File

@ -169,6 +169,11 @@ BOOST_AUTO_TEST_CASE(function_definitions_multiple_args)
BOOST_CHECK(successParse("{ function f(a, d) { } function g(a, d) -> (x, y) { } }"));
}
BOOST_AUTO_TEST_CASE(function_calls)
{
BOOST_CHECK(successParse("{ g(1, 2, f(mul(2, 3))) x() }"));
}
BOOST_AUTO_TEST_SUITE_END()
BOOST_AUTO_TEST_SUITE(Printing)