Reader Syntax Entry: List

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Reader Syntax Entry: List

Name

List

Class

Reader Syntax

Concrete Syntax

list ::= "(" element* ")"

Description

A list is a sequence of zero or more expressions enclosed in parentheses.

Acceptance Rules

  • elements are separated by delimiters and nested syntax

Strict/Lax Policy

  • strict and lax modes agree for ordinary list syntax

Examples

  • ()
  • (A B C)
  • ((A B) C)

Compatibility

Stable across vendors.

Notes

The empty list is semantically nil.

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.