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Merge pull request #4408 from ethereum/v050-no-unary-plus

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[BREAKING] defaulting to v0.5.0 behaviour of unary + operator (disallow)
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chriseth 2018-07-10 16:28:51 +02:00 committed by GitHub
commit dce0da1d17
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6 changed files with 5 additions and 29 deletions
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1
Changelog.md
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@ -38,6 +38,7 @@ Breaking Changes:
* Type Checker: Only accept a single ``bytes`` type for ``.call()`` (and family), ``keccak256()``, ``sha256()`` and ``ripemd160()``.
* Remove obsolete ``std`` directory from the Solidity repository. This means accessing ``https://github.com/ethereum/soldity/blob/develop/std/*.sol`` (or ``https://github.com/ethereum/solidity/std/*.sol`` in Remix) will not be possible.
* Syntax Checker: Named return values in function types are an error.
* Syntax Checker: Disallow unary ``+``. This was already the case in the experimental 0.5.0 mode.
* View Pure Checker: Strictly enfore state mutability. This was already the case in the experimental 0.5.0 mode.
Language Features:

10
libsolidity/analysis/SyntaxChecker.cpp
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@ -192,15 +192,9 @@ bool SyntaxChecker::visit(Throw const& _throwStatement)
bool SyntaxChecker::visit(UnaryOperation const& _operation)
{
bool const v050 = m_sourceUnit->annotation().experimentalFeatures.count(ExperimentalFeature::V050);
if (_operation.getOperator() == Token::Add)
{
if (v050)
m_errorReporter.syntaxError(_operation.location(), "Use of unary + is deprecated.");
else
m_errorReporter.warning(_operation.location(), "Use of unary + is deprecated.");
}
m_errorReporter.syntaxError(_operation.location(), "Use of unary + is disallowed.");
return true;
}

2
test/libsolidity/syntaxTests/nameAndTypeResolution/308_rational_unary_plus_operation.sol
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@ -6,4 +6,4 @@ contract test {
}
}
// ----
// Warning: (70-75): Use of unary + is deprecated.
// SyntaxError: (70-75): Use of unary + is disallowed.

10
test/libsolidity/syntaxTests/nameAndTypeResolution/310_rational_unary_plus_operation_v050.sol
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@ -1,10 +0,0 @@
pragma experimental "v0.5.0";
contract test {
function f() pure public {
ufixed16x2 a = +3.25;
fixed16x2 b = -3.25;
a; b;
}
}
// ----
// SyntaxError: (100-105): Use of unary + is deprecated.

9
test/libsolidity/syntaxTests/nameAndTypeResolution/311_rational_unary_plus_assignment_v050.sol
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@ -1,9 +0,0 @@
pragma experimental "v0.5.0";
contract test {
function f(uint x) pure public {
uint y = +x;
y;
}
}
// ----
// SyntaxError: (100-102): Use of unary + is deprecated.

2
test/libsolidity/syntaxTests/nameAndTypeResolution/309_rational_unary_plus_assignment.sol → test/libsolidity/syntaxTests/parsing/unary_plus_expression.sol
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@ -5,4 +5,4 @@ contract test {
}
}
// ----
// Warning: (70-72): Use of unary + is deprecated.
// SyntaxError: (70-72): Use of unary + is disallowed.