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Merge pull request #3535 from ethereum/fixShadowing

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Fix shadowing detection for aliases
This commit is contained in:
Alex Beregszaszi 2018-02-20 16:42:02 +01:00 committed by GitHub
commit f5f00b4ee9
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3 changed files with 26 additions and 3 deletions
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1
Changelog.md
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@ -7,6 +7,7 @@ Features:
Bugfixes:
* JSON-AST: Add "documentation" property to function, event and modifier definition.
* Resolver: Properly determine shadowing for imports with aliases.
* Standard JSON: catch errors properly when invalid "sources" are passed
* Type Checker: Properly warn when using ``_offset`` and ``_slot`` for constants in inline assembly.

5
libsolidity/analysis/NameAndTypeResolver.cpp
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@ -457,9 +457,10 @@ bool DeclarationRegistrationHelper::registerDeclaration(
if (!_errorLocation)
_errorLocation = &_declaration.location();
string name = _name ? *_name : _declaration.name();
Declaration const* shadowedDeclaration = nullptr;
if (_warnOnShadow && !_declaration.name().empty() && _container.enclosingContainer())
for (auto const* decl: _container.enclosingContainer()->resolveName(_declaration.name(), true))
if (_warnOnShadow && !name.empty() && _container.enclosingContainer())
for (auto const* decl: _container.enclosingContainer()->resolveName(name, true))
shadowedDeclaration = decl;
if (!_container.registerDeclaration(_declaration, _name, !_declaration.isVisibleInContract()))

23
test/libsolidity/Imports.cpp
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@ -266,7 +266,28 @@ BOOST_AUTO_TEST_CASE(shadowing_builtins_with_multiple_imports)
}
}
BOOST_AUTO_TEST_CASE(shadowing_builtins_with_alias)
{
CompilerStack c;
c.addSource("B.sol", "contract C {} pragma solidity >=0.0;");
c.addSource("b", R"(
pragma solidity >=0.0;
import {C as msg} from "B.sol";
)");
BOOST_CHECK(c.compile());
auto numErrors = c.errors().size();
// Sometimes we get the prerelease warning, sometimes not.
BOOST_CHECK(1 <= numErrors && numErrors <= 2);
for (auto const& e: c.errors())
{
string const* msg = e->comment();
BOOST_REQUIRE(msg);
BOOST_CHECK(
msg->find("pre-release") != string::npos ||
msg->find("shadows a builtin symbol") != string::npos
);
}
}
BOOST_AUTO_TEST_SUITE_END()