public override RuntimeValueWrapper Execute(RuntimeContext context)
{
RuntimeInvokableValue.IncompletedExpression incompletedExpression = new RuntimeInvokableValue.IncompletedExpression()
{
Context = new RuntimeContext()
{
PreviousContext = context
},
Expression = Expression,
Patterns = Parameters.Select(n => (Expression) new IdentifierExpression()
{
Name = n
}).ToList(),
};
RuntimeInvokableValue value = new RuntimeInvokableValue();
value.IncompletedExpressions.Add(incompletedExpression);
return(new RuntimeValueWrapper(value, context));
}
public override void BuildContext(RuntimeContext context)
{
RuntimeInvokableValue invokableValue = null;
if (context.Values.ContainsKey(Name))
{
RuntimeValueWrapper valueWrapper = context.Values[Name];
invokableValue = valueWrapper.Value as RuntimeInvokableValue;
if (invokableValue == null || this.Patterns.Count == 0)
{
throw new Exception(string.Format("{0}不可重复定义。", Name));
}
}
if (this.Patterns.Count == 0)
{
context.Values.Add(Name, new RuntimeValueWrapper(new RuntimeUnevaluatedValue(Expression), context));
}
else
{
if (invokableValue == null)
{
invokableValue = new RuntimeInvokableValue();
context.Values.Add(Name, new RuntimeValueWrapper(invokableValue, context));
}
RuntimeInvokableValue.IncompletedExpression incompletedExpression = new RuntimeInvokableValue.IncompletedExpression()
{
Context = new RuntimeContext()
{
PreviousContext = context
},
Expression = Expression,
Patterns = new List <Expression>(Patterns),
};
invokableValue.IncompletedExpressions.Add(incompletedExpression);
}
}