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| author | Alex Beregszaszi <alex@rtfs.hu> | 2018-02-27 19:02:56 +0800 |
|---|---|---|
| committer | Alex Beregszaszi <alex@rtfs.hu> | 2018-03-26 18:35:17 +0800 |
| commit | ef3595b0001614c19174c61d29d221844ed83a0e (patch) | |
| tree | fe46d4e1ba7ae882c026145086482f9de75608f9 /libsolidity | |
| parent | ba209fe485ba40ea3926800bc90932bec40cd16f (diff) | |
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Allow overriding external functions in interfaces with public in an implementing contract
Diffstat (limited to 'libsolidity')
| -rw-r--r-- | libsolidity/analysis/TypeChecker.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp index 999a2a97..487959c5 100644 --- a/libsolidity/analysis/TypeChecker.cpp +++ b/libsolidity/analysis/TypeChecker.cpp @@ -366,6 +366,16 @@ void TypeChecker::checkContractIllegalOverrides(ContractDefinition const& _contr } } +namespace { + +bool functionIsInInterface(FunctionDefinition const& _function) +{ + return dynamic_cast<ContractDefinition const*>(_function.scope()) && + dynamic_cast<ContractDefinition const*>(_function.scope())->contractKind() == ContractDefinition::ContractKind::Interface; +} + +} + void TypeChecker::checkFunctionOverride(FunctionDefinition const& function, FunctionDefinition const& super) { FunctionType functionType(function); @@ -378,7 +388,12 @@ void TypeChecker::checkFunctionOverride(FunctionDefinition const& function, Func function.annotation().superFunction = &super; if (function.visibility() != super.visibility()) + { + // visibility is enforced to be external in interfaces, but a contract can override that with public + if (functionIsInInterface(super) && !functionIsInInterface(function) && function.visibility() == FunctionDefinition::Visibility::Public) + return; overrideError(function, super, "Overriding function visibility differs."); + } else if (function.stateMutability() != super.stateMutability()) overrideError( |