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Support parsing let statements without a value

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This commit is contained in:
Alex Beregszaszi 2017-05-05 16:46:26 +01:00
parent 2b33e0bcec
commit cee93d946d
5 changed files with 35 additions and 11 deletions
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16
libsolidity/inlineasm/AsmAnalysis.cpp
View File

@ -174,14 +174,20 @@ bool AsmAnalyzer::operator()(assembly::Assignment const& _assignment)
bool AsmAnalyzer::operator()(assembly::VariableDeclaration const& _varDecl)
{
bool success = true;
int const expectedItems = _varDecl.variables.size();
int const stackHeight = m_stackHeight;
bool success = boost::apply_visitor(*this, *_varDecl.value);
if ((m_stackHeight - stackHeight) != expectedItems)
if (_varDecl.value)
{
m_errorReporter.declarationError(_varDecl.location, "Variable count mismatch.");
return false;
int const stackHeight = m_stackHeight;
success = boost::apply_visitor(*this, *_varDecl.value);
if ((m_stackHeight - stackHeight) != expectedItems)
{
m_errorReporter.declarationError(_varDecl.location, "Variable count mismatch.");
return false;
}
}
else
m_stackHeight += expectedItems;
for (auto const& variable: _varDecl.variables)
{

13
libsolidity/inlineasm/AsmParser.cpp
View File

@ -347,10 +347,15 @@ assembly::VariableDeclaration Parser::parseVariableDeclaration()
else
break;
}
expectToken(Token::Colon);
expectToken(Token::Assign);
varDecl.value.reset(new Statement(parseExpression()));
varDecl.location.end = locationOf(*varDecl.value).end;
if (currentToken() == Token::Colon)
{
expectToken(Token::Colon);
expectToken(Token::Assign);
varDecl.value.reset(new Statement(parseExpression()));
varDecl.location.end = locationOf(*varDecl.value).end;
}
else
varDecl.location.end = varDecl.variables.back().location.end;
return varDecl;
}

7
libsolidity/inlineasm/AsmPrinter.cpp
View File

@ -128,8 +128,11 @@ string AsmPrinter::operator()(assembly::VariableDeclaration const& _variableDecl
),
", "
);
out += " := ";
out += boost::apply_visitor(*this, *_variableDeclaration.value);
if (_variableDeclaration.value)
{
out += " := ";
out += boost::apply_visitor(*this, *_variableDeclaration.value);
}
return out;
}

5
test/libjulia/Parser.cpp
View File

@ -131,6 +131,11 @@ BOOST_AUTO_TEST_CASE(vardecl_bool)
BOOST_CHECK(successParse("{ let x:bool := false:bool }"));
}
BOOST_AUTO_TEST_CASE(vardecl_empty)
{
BOOST_CHECK(successParse("{ let x }"));
}
BOOST_AUTO_TEST_CASE(assignment)
{
BOOST_CHECK(successParse("{ let x:u256 := 2:u256 let y:u256 := x }"));

5
test/libsolidity/InlineAssembly.cpp
View File

@ -195,6 +195,11 @@ BOOST_AUTO_TEST_CASE(vardecl_bool)
CHECK_PARSE_ERROR("{ let x := false }", ParserError, "True and false are not valid literals.");
}
BOOST_AUTO_TEST_CASE(vardecl_empty)
{
BOOST_CHECK(successParse("{ let x }"));
}
BOOST_AUTO_TEST_CASE(assignment)
{
BOOST_CHECK(successParse("{ let x := 2 7 8 add =: x }"));