/// <summary>
/// Gets a member access object representing the a member access.
/// </summary>
/// <param name="node"></param>
/// <param name="ctx"></param>
/// <param name="varExp"></param>
/// <param name="memberName"></param>
/// <returns></returns>
public static MemberAccess GetMemberAccess(AstNode node, Context ctx, Expr varExp, string memberName)
{
bool isVariableExp = varExp is VariableExpr;
string variableName = isVariableExp ? ((VariableExpr)varExp).Name : string.Empty;
// CASE 1: External function call "user.create"
if (isVariableExp && FunctionHelper.IsExternalFunction(ctx.ExternalFunctions, variableName, memberName))
{
return new MemberAccess(MemberMode.FunctionExternal)
{
Name = variableName, MemberName = memberName
}
}
;
// CASE 2. Static method call: "Person.Create"
if (isVariableExp)
{
var result = MemberHelper.IsExternalTypeName(ctx.Memory, ctx.Types, variableName);
if (result.Success)
{
return(MemberHelper.GetExternalTypeMember(node, (Type)result.Item, variableName, null, memberName, true));
}
}
var obj = varExp.Evaluate() as LObject;
// Check for empty objects.
ExceptionHelper.NotNull(node, obj, "member access");
var type = obj.Type;
// Case 3: Method / Property on FluentScript type
bool isCoreType = obj.Type.IsBuiltInType();
if (isCoreType)
{
var result = MemberHelper.GetLangBasicTypeMember(node, ctx.Methods, obj, memberName);
return(result);
}
// CASE 4: Method / Property on External/Host language type (C#)
var lclass = obj as LClass;
var lclassType = lclass.Type as LClassType;
var member = MemberHelper.GetExternalTypeMember(node, lclassType.DataType, variableName, lclass.Value, memberName, false);
return(member);
}
/// <summary>
/// Gets a member access object representing the a member access.
/// </summary>
/// <param name="node"></param>
/// <param name="ctx"></param>
/// <param name="varExp"></param>
/// <param name="memberName"></param>
/// <returns></returns>
public static MemberAccess GetMemberAccess(AstNode node, Context ctx, Expr varExp, string memberName, IAstVisitor visitor)
{
var isVariableExp = varExp.IsNodeType(NodeTypes.SysVariable);
var variableName = isVariableExp ? ((VariableExpr)varExp).Name : string.Empty;
// CASE 1: External function call "user.create"
if (isVariableExp && FunctionHelper.IsExternalFunction(ctx.ExternalFunctions, variableName, memberName))
{
return new MemberAccess(MemberMode.FunctionExternal)
{
Name = variableName, MemberName = memberName
}
}
;
// CASE 2. Static method call: "Person.Create"
if (isVariableExp)
{
var result = MemberHelper.IsExternalTypeName(ctx.Memory, ctx.Types, variableName);
if (result.Success)
{
return(MemberHelper.GetExternalTypeMember(node, (Type)result.Item, variableName, null, memberName, true));
}
}
// CASE 3: Module
if (varExp.IsNodeType(NodeTypes.SysVariable))
{
var name = varExp.ToQualifiedName();
if (!ctx.Memory.Contains(name))
{
var modresult = ResolveSymbol(varExp.SymScope, name);
if (modresult != null)
{
return(modresult);
}
}
}
// CASE 4: Nested member.
var res = varExp.Visit(visitor);
if (res is MemberAccess)
{
return(res as MemberAccess);
}
var obj = res as LObject;
// Check for empty objects.
ExceptionHelper.NotNull(node, obj, "member access");
var type = obj.Type;
// Case 3: Method / Property on FluentScript type
var isCoreType = obj.Type.IsBuiltInType();
if (isCoreType)
{
var result = MemberHelper.GetLangBasicTypeMember(node, ctx.Methods, obj, memberName);
return(result);
}
// CASE 4: Method / Property on External/Host language type (C#)
var lclass = obj as LClass;
var lclassType = lclass.Type as LClassType;
var member = MemberHelper.GetExternalTypeMember(node, lclassType.DataType, variableName, lclass.Value, memberName, false);
return(member);
}