public virtual DataType ProcessExpression(ExpressionAst expression)
{
Guard.Against.Null(expression, nameof(expression));
if (expression is OperatorExpressionAst operatorExpression)
{
return(ProcessOperatorExpression(operatorExpression));
}
if (expression is AssignExpressionAst assignExpression)
{
return(ProcessAssignExpression(assignExpression));
}
if (expression is CallExpressionAst callExpression)
{
return(ProcessCallExpression(callExpression));
}
if (expression is LiteralExpressionAst literalExpression)
{
return(ProcessLiteralExpression(literalExpression));
}
if (expression is IdentExpressionAst identExpression)
{
return(ProcessIdentExpression(identExpression));
}
if (expression is GroupExpressionAst groupExpression)
{
return(ProcessGroupExpression(groupExpression));
}
throw new ArgumentException("Unknown expression type" + expression.GetType(), nameof(expression));
}
public ExpressionAst _VisitExpression(ExpressionAst expressionAst)
{
//Console.WriteLine("Visiting expression type {0}", expressionAst.GetType().FullName);
var @switch = new Dictionary <Type, Func <ExpressionAst, ExpressionAst> > {
{ typeof(ArrayExpressionAst), (e) => { return((ExpressionAst)VisitArrayExpression(e as ArrayExpressionAst)); } },
{ typeof(ArrayLiteralAst), (e) => { return((ExpressionAst)VisitArrayLiteral(e as ArrayLiteralAst)); } },
{ typeof(AttributedExpressionAst), (e) => { return((ExpressionAst)VisitAttributedExpression(e as AttributedExpressionAst)); } },
//AttributedExpressionAst
{ typeof(ConvertExpressionAst), (e) => { return((ExpressionAst)VisitConvertExpression(e as ConvertExpressionAst)); } },
{ typeof(BinaryExpressionAst), (e) => { return((ExpressionAst)VisitBinaryExpression(e as BinaryExpressionAst)); } },
{ typeof(ConstantExpressionAst), (e) => { return((ExpressionAst)VisitConstantExpression(e as ConstantExpressionAst)); } },
//ConstantExpressionAst
{ typeof(StringConstantExpressionAst), (e) => { return((ExpressionAst)VisitStringConstantExpression(e as StringConstantExpressionAst)); } },
{ typeof(ErrorExpressionAst), (e) => { return((ExpressionAst)VisitErrorExpression(e as ErrorExpressionAst)); } },
{ typeof(ExpandableStringExpressionAst), (e) => { return((ExpressionAst)VisitExpandableStringExpression(e as ExpandableStringExpressionAst)); } },
{ typeof(HashtableAst), (e) => { return((ExpressionAst)VisitHashtable(e as HashtableAst)); } },
{ typeof(IndexExpressionAst), (e) => { return((ExpressionAst)VisitIndexExpression(e as IndexExpressionAst)); } },
{ typeof(MemberExpressionAst), (e) => { return((ExpressionAst)VisitMemberExpression(e as MemberExpressionAst)); } },
//MemberExpressionAst
{ typeof(InvokeMemberExpressionAst), (e) => { return((ExpressionAst)VisitInvokeMemberExpression(e as InvokeMemberExpressionAst)); } },
{ typeof(ParenExpressionAst), (e) => { return((ExpressionAst)VisitParenExpression(e as ParenExpressionAst)); } },
{ typeof(ScriptBlockExpressionAst), (e) => { return((ExpressionAst)VisitScriptBlockExpression(e as ScriptBlockExpressionAst)); } },
{ typeof(SubExpressionAst), (e) => { return((ExpressionAst)VisitSubExpression(e as SubExpressionAst)); } },
{ typeof(TypeExpressionAst), (e) => { return((ExpressionAst)VisitTypeExpression(e as TypeExpressionAst)); } },
{ typeof(UnaryExpressionAst), (e) => { return((ExpressionAst)VisitUnaryExpression(e as UnaryExpressionAst)); } },
{ typeof(UsingExpressionAst), (e) => { return((ExpressionAst)VisitUsingExpression(e as UsingExpressionAst)); } },
{ typeof(VariableExpressionAst), (e) => { return((ExpressionAst)VisitVariableExpression(e as VariableExpressionAst)); } }
};
if (expressionAst != null && @switch.ContainsKey(expressionAst.GetType()))
{
return(@switch[expressionAst.GetType()](expressionAst));
}
else
{
//Console.WriteLine("_VisitExpression may not know how to visit type {0}", expressionAst.GetType().FullName);
return(null);
}
}
internal static SettableExpression Create(ExpressionAst valueExpression, ExecutionVisitor currentExecution)
{
if (valueExpression is VariableExpressionAst)
{
return(new SettableVariableExpression((VariableExpressionAst)valueExpression, currentExecution));
}
else if (valueExpression is MemberExpressionAst)
{
return(new SettableMemberExpression((MemberExpressionAst)valueExpression, currentExecution));
}
else if (valueExpression is IndexExpressionAst)
{
return(new SettableIndexExpression((IndexExpressionAst)valueExpression, currentExecution));
}
var msg = String.Format("The expression is not a modifiable value, but of type '{0}'. Please report this!",
valueExpression.GetType().FullName);
throw new InvalidOperationException(msg);
}
private ExpressionAst CreateLoggingExpression(ExpressionAst source)
{
return(CreateLoggingExpressionImpl(CreateEvaluation(source), source.Extent, source.GetType()));
}
