What are the supported editing commands for the GNU APL line editor (∇-editor)?

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The GNU APL documentation on the line editor seems to assume one already knows how to use it. I only see mention of what commands/syntax '... are not fully supported in GNU APL'.

Compare with the documentation of Dyalog's APL ∇-editor, or MicroAPL.

I'd be willing to prepare a patch to submit for the documentation if anyone has a reference.

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2 Answers

The main developer of GNU APL, Jürgen Sauermann, has told me that GNU APL's editor is a clone of APL2's line editor, and thus should support the same commands:

command action
[⎕] display the current whole definition
[⎕2 7 1 …] display specific lines
[⎕2-7] display a range of lines
[⎕-7] display all lines until a specific line
[⎕7-] display all lines beginning with a specific line
[7] code replace a specific line
[2.1] code insert a line between two lines
[∆2 7 1] delete specific lines
[∆2-7] delete a range of lines
[∆-7] delete all lines until a specific line
[∆7-] delete all lines beginning with a specific line
[→] quit without saving
[2⎕7] display line 2 for editing, placing the cursor at position 7
[2⎕0] display line 2 for editing, placing the cursor at the end of the line

Source: IBM's APL2 Language Reference

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See:

APL: The Language and Its Usage; Polivka & Pakin; 1975

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