Function Entry: VLAX-LDATA-TEST

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Function Entry: VLAX-LDATA-TEST

Name

vlax-ldata-test

Class

Visual LISP persistent-data predicate

Syntax

(vlax-ldata-test value)

Arguments and Values

value — any AutoLISP value.

Autodesk specifically documents the storable categories as integer, real, string, list, ename, VLA-object, variant, safearray, T, or nil.

Description

Determines whether a value can be stored as ldata.

Return Values

Returns non-nil if the value is admissible for ldata persistence; otherwise returns nil.

Exceptional Situations

Signals an AutoLISP-visible error if the implementation cannot determine whether the value is storable.

Availability

AutoCAD 2026: documented (per Autodesk reference page).
BricsCAD V26: presumed compatible (no contradicting page found).
Status: AutoCAD documented; BricsCAD presumed-both pending Phase 4 verification.

Source Notes

[vlax-ldata-test (AutoLISP/ActiveX)](https://help.autodesk.com/cloudhelp/2025/ENU/AutoCAD-MAC-AutoLISP-Reference/files/GUID-CD72D160-25BF-43F5-BD30-AC715F4A2426.htm)

Compatibility

Available on Windows only; not available on macOS or Web.