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Merge pull request #836 from chriseth/unusedunderscore

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BREAKING: Require modifiers to contain "_".
This commit is contained in:
chriseth 2016-08-17 11:28:02 +02:00 committed by GitHub
commit e7683f4722
4 changed files with 51 additions and 13 deletions
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21
libsolidity/analysis/SyntaxChecker.cpp
View File

@ -40,13 +40,26 @@ void SyntaxChecker::syntaxError(SourceLocation const& _location, std::string con
m_errors.push_back(err);
}
bool SyntaxChecker::visit(ModifierDefinition const&)
{
m_placeholderFound = false;
return true;
}
void SyntaxChecker::endVisit(ModifierDefinition const& _modifier)
{
if (!m_placeholderFound)
syntaxError(_modifier.body().location(), "Modifier body does not contain '_'.");
m_placeholderFound = false;
}
bool SyntaxChecker::visit(WhileStatement const&)
{
m_inLoopDepth++;
return true;
}
void SyntaxChecker::endVisit(WhileStatement const&)
void SyntaxChecker::endVisit(WhileStatement const& )
{
m_inLoopDepth--;
}
@ -78,3 +91,9 @@ bool SyntaxChecker::visit(Break const& _breakStatement)
return true;
}
bool SyntaxChecker::visit(const PlaceholderStatement&)
{
m_placeholderFound = true;
return true;
}

9
libsolidity/analysis/SyntaxChecker.h
View File

@ -31,6 +31,7 @@ namespace solidity
/**
* The module that performs syntax analysis on the AST:
* - whether continue/break is in a for/while loop.
* - whether a modifier contains at least one '_'
*/
class SyntaxChecker: private ASTConstVisitor
{
@ -44,6 +45,9 @@ private:
/// Adds a new error to the list of errors.
void syntaxError(SourceLocation const& _location, std::string const& _description);
virtual bool visit(ModifierDefinition const& _modifier) override;
virtual void endVisit(ModifierDefinition const& _modifier) override;
virtual bool visit(WhileStatement const& _whileStatement) override;
virtual void endVisit(WhileStatement const& _whileStatement) override;
virtual bool visit(ForStatement const& _forStatement) override;
@ -52,8 +56,13 @@ private:
virtual bool visit(Continue const& _continueStatement) override;
virtual bool visit(Break const& _breakStatement) override;
virtual bool visit(PlaceholderStatement const& _placeholderStatement) override;
ErrorList& m_errors;
/// Flag that indicates whether a function modifier actually contains '_'.
bool m_placeholderFound = false;
int m_inLoopDepth = 0;
};

4
test/libsolidity/SolidityEndToEndTest.cpp
View File

@ -2410,7 +2410,7 @@ BOOST_AUTO_TEST_CASE(function_modifier_overriding)
modifier mod { _ }
}
contract C is A {
modifier mod { }
modifier mod { if (false) _ }
}
)";
compileAndRun(sourceCode);
@ -2427,7 +2427,7 @@ BOOST_AUTO_TEST_CASE(function_modifier_calling_functions_in_creation_context)
function f2() { data |= 0x20; }
function f3() { }
modifier mod1 { f2(); _ }
modifier mod2 { f3(); }
modifier mod2 { f3(); if (false) _ }
function getData() returns (uint r) { return data; }
}
contract C is A {

30
test/libsolidity/SolidityNameAndTypeResolution.cpp
View File

@ -901,8 +901,8 @@ BOOST_AUTO_TEST_CASE(function_modifier_invocation_local_variables)
BOOST_AUTO_TEST_CASE(legal_modifier_override)
{
char const* text = R"(
contract A { modifier mod(uint a) {} }
contract B is A { modifier mod(uint a) {} }
contract A { modifier mod(uint a) { _ } }
contract B is A { modifier mod(uint a) { _ } }
)";
BOOST_CHECK(success(text));
}
@ -910,8 +910,8 @@ BOOST_AUTO_TEST_CASE(legal_modifier_override)
BOOST_AUTO_TEST_CASE(illegal_modifier_override)
{
char const* text = R"(
contract A { modifier mod(uint a) {} }
contract B is A { modifier mod(uint8 a) {} }
contract A { modifier mod(uint a) { _ } }
contract B is A { modifier mod(uint8 a) { _ } }
)";
BOOST_CHECK(expectError(text) == Error::Type::TypeError);
}
@ -919,8 +919,8 @@ BOOST_AUTO_TEST_CASE(illegal_modifier_override)
BOOST_AUTO_TEST_CASE(modifier_overrides_function)
{
char const* text = R"(
contract A { modifier mod(uint a) {} }
contract B is A { function mod(uint a) {} }
contract A { modifier mod(uint a) { _ } }
contract B is A { function mod(uint a) { } }
)";
BOOST_CHECK(expectError(text) == Error::Type::TypeError);
}
@ -928,8 +928,8 @@ BOOST_AUTO_TEST_CASE(modifier_overrides_function)
BOOST_AUTO_TEST_CASE(function_overrides_modifier)
{
char const* text = R"(
contract A { function mod(uint a) {} }
contract B is A { modifier mod(uint a) {} }
contract A { function mod(uint a) { } }
contract B is A { modifier mod(uint a) { _ } }
)";
BOOST_CHECK(expectError(text) == Error::Type::TypeError);
}
@ -938,8 +938,8 @@ BOOST_AUTO_TEST_CASE(modifier_returns_value)
{
char const* text = R"(
contract A {
function f(uint a) mod(2) returns (uint r) {}
modifier mod(uint a) { return 7; }
function f(uint a) mod(2) returns (uint r) { }
modifier mod(uint a) { _ return 7; }
}
)";
BOOST_CHECK(expectError(text) == Error::Type::TypeError);
@ -3823,6 +3823,16 @@ BOOST_AUTO_TEST_CASE(unused_return_value_delegatecall)
BOOST_CHECK(expectError(text, true) == Error::Type::Warning);
}
BOOST_AUTO_TEST_CASE(modifier_without_underscore)
{
char const* text = R"(
contract test {
modifier m() {}
}
)";
BOOST_CHECK(expectError(text, true) == Error::Type::SyntaxError);
}
BOOST_AUTO_TEST_SUITE_END()
}