REXX Control Flow

REXX Control Flow is a VS Code extension that builds a function call graph from a REXX source file.

Features

• Generate an interactive call graph from the active REXX editor.
• Export the graph to JSON.
• Export the graph to DOT format.
• Click graph nodes to jump to the matching source line.
• Auto-refresh the graph when the source document changes.
• Focus on function-to-function call relationships from MAIN and labels.

Supported call-graph constructs

• Labels (label:) as function entries
• CALL label as function-to-function edges
• Dynamic calls (CALL VALUE ..., CALL (...)) grouped as DYNAMIC_CALL
• Multiple statements per line separated by ; (quote-aware splitting)

Usage

1. Open a REXX file.
2. Right-click in the editor.
3. Run Generate REXX Control Flow.

From the command palette, you can also run:

• REXX Control Flow: Export REXX Control Flow to JSON
• REXX Control Flow: Export REXX Control Flow to DOT

Notes

This version intentionally shows a higher-level call graph instead of statement-by-statement control flow.