public override AstNode Visit(EnumConstantDefinition node)
{
// Get the field.
FieldVariable field = node.GetVariable();
// Ignore external constants.
if(field.IsExternal())
return node;
// Get the initializer.
Expression initializer = node.GetValue();
if(initializer == null)
Error(node, "constants must have initializers.");
// Don't allow multiple definitions.
if(constants.ContainsKey(field))
Error(node, "multiples definitions of a constant.");
// Store the constant.
ConstantData data = new ConstantData(field, initializer);
this.constants.Add(field, data);
// Return the node.
return node;
}
public override AstNode Visit(EnumConstantDefinition node)
{
// Get the value expression
Expression valueExpression = node.GetValue();
valueExpression.Accept(this);
// Check the value compatibility.
IChelaType enumType = node.GetCoercionType();
IChelaType valueType = valueExpression.GetNodeType();
if(!valueType.IsConstant())
Error(valueExpression, "expected constant expresion.");
if(valueType != enumType &&
Coerce(valueType, enumType) != enumType)
Error(valueExpression, "incompatible value type.");
return node;
}