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Refactoring to allow multi-variable declarations.

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chriseth
2015-10-08 18:25:44 +02:00
parent 23865e3929
commit b9a166061b
7 changed files with 120 additions and 55 deletions
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libsolidity/AST.h
+16 -5
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@@ -963,20 +963,31 @@ public:
* Definition of a variable as a statement inside a function. It requires a type name (which can
* also be "var") but the actual assignment can be missing.
* Examples: var a = 2; uint256 a;
* As a second form, multiple variables can be declared, cannot have a type and must be assigned
* right away. If the first or last component is unnamed, it can "consume" an arbitrary number
* of components.
* Examples: var (a, b) = f(); var (a,,,c) = g(); var (a,) = d();
*/
class VariableDeclarationStatement: public Statement
{
public:
VariableDeclarationStatement(SourceLocation const& _location, ASTPointer<VariableDeclaration> _variable):
Statement(_location), m_variable(_variable) {}
VariableDeclarationStatement(
SourceLocation const& _location,
std::vector<ASTPointer<VariableDeclaration>> const& _variables,
ASTPointer<Expression> const& _initialValue
):
Statement(_location), m_variables(_variables), m_initialValue(_initialValue) {}
virtual void accept(ASTVisitor& _visitor) override;
virtual void accept(ASTConstVisitor& _visitor) const override;
VariableDeclaration const& declaration() const { return *m_variable; }
Expression const* expression() const { return m_variable->value().get(); }
std::vector<ASTPointer<VariableDeclaration>> const& declarations() const { return m_variables; }
Expression const* initialValue() const { return m_initialValue.get(); }
private:
ASTPointer<VariableDeclaration> m_variable;
/// List of variables, some of which can be empty pointers (unnamed components).
std::vector<ASTPointer<VariableDeclaration>> m_variables;
/// The assigned expression / initial value.
ASTPointer<Expression> m_initialValue;
};
/**