public void Set(string name, object data, Type type)
{
if (_parentContext != null && _parentContext.Exists(name))
{
_parentContext.Set(name, data, type);
}
SetLocal(name, data, type);
}
public override ValueExpression Evaluate(IParserContext context)
{
ValueExpression valueRight = Right.Evaluate(context);
if (Left is VariableExpression)
{
if ((context.AssignmentPermissions & AssignmentPermissions.Variable) == AssignmentPermissions.None)
throw new IllegalAssignmentException("Assignment to variable not allowed", this);
VariableExpression varExpr = (VariableExpression)Left;
bool exists = context.Exists(varExpr.VarName);
if (exists && (context.AssignmentPermissions & AssignmentPermissions.ExistingVariable) == AssignmentPermissions.None)
throw new IllegalAssignmentException("Assignment to existing variable not allowed", this);
if (!exists && (context.AssignmentPermissions & AssignmentPermissions.NewVariable) == AssignmentPermissions.None)
throw new IllegalAssignmentException("Assignment to new variable not allowed", this);
context.Set(varExpr.VarName, valueRight.Value, valueRight.Type);
return valueRight;
}
if (Left is FieldExpression)
{
if ((context.AssignmentPermissions & AssignmentPermissions.Property) == AssignmentPermissions.None)
throw new IllegalAssignmentException("Assignment to property not allowed", this);
return ((FieldExpression)Left).Assign(context, valueRight.Value);
}
throw new IllegalAssignmentException(this);
}
public override ValueExpression Evaluate(IParserContext context)
{
ValueExpression valueRight = Right.Evaluate(context);
if (Left is VariableExpression)
{
if ((context.AssignmentPermissions & AssignmentPermissions.Variable) == AssignmentPermissions.None)
{
throw new IllegalAssignmentException("Assignment to variable not allowed", this);
}
VariableExpression varExpr = (VariableExpression)Left;
bool exists = context.Exists(varExpr.VarName);
if (exists && (context.AssignmentPermissions & AssignmentPermissions.ExistingVariable) == AssignmentPermissions.None)
{
throw new IllegalAssignmentException("Assignment to existing variable not allowed", this);
}
if (!exists && (context.AssignmentPermissions & AssignmentPermissions.NewVariable) == AssignmentPermissions.None)
{
throw new IllegalAssignmentException("Assignment to new variable not allowed", this);
}
context.Set(varExpr.VarName, valueRight.Value, valueRight.Type);
return(valueRight);
}
if (Left is FieldExpression)
{
if ((context.AssignmentPermissions & AssignmentPermissions.Property) == AssignmentPermissions.None)
{
throw new IllegalAssignmentException("Assignment to property not allowed", this);
}
return(((FieldExpression)Left).Assign(context, valueRight.Value));
}
if (Left is IndexExpression)
{
if ((context.AssignmentPermissions & AssignmentPermissions.Indexer) == AssignmentPermissions.None)
{
throw new IllegalAssignmentException("Assignment to indexer not allowed", this);
}
return(((IndexExpression)Left).Assign(context, valueRight.Value));
}
throw new IllegalAssignmentException(this);
}
/// <summary>
/// Checks if a mapping for the supplied parameter exists. Uses a <see cref="LambdaExpression"/> to identify the parameter.
/// </summary>
/// <typeparam name="T">The <see cref="Type"/>.</typeparam>
/// <typeparam name="TProperty">The <see cref="Type"/> of the property.</typeparam>
/// <param name="parserContext">The <see cref="IParserContext"/>.</param>
/// <param name="propertySelector">A <see cref="LambdaExpression"/> which selects the property.</param>
/// <returns><c>true</c> if the mapping was found; otherwise, <c>false</c>.</returns>
/// <exception cref="ArgumentNullException">The value of '<paramref name="parserContext"/>' and '<paramref name="propertySelector"/>' cannot be null. </exception>
public static Boolean Exists <T, TProperty>([NotNull] this IParserContext parserContext, [NotNull] Expression <Func <T, TProperty> > propertySelector)
{
if (parserContext == null)
{
throw new ArgumentNullException(nameof(parserContext));
}
if (propertySelector == null)
{
throw new ArgumentNullException(nameof(propertySelector));
}
return(parserContext.Exists(propertySelector));
}