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Re: [RFC] Convention for marking pretty-printers output
From: |
Jose E. Marchesi |
Subject: |
Re: [RFC] Convention for marking pretty-printers output |
Date: |
Sun, 27 Oct 2019 02:01:05 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) |
Hi Bruno.
> However, this also leads to long printouts in the REPL that can get
> tiresome to read, ... That's the reason why poke supports
> pretty-printers.
For a moment, I thought what you wanted is an algorithm that inserts
an appropriate amount of whitespace, in order to transform
BPF_Insn {opcode=BPF_Insn_Opcode {ldst=#<lddw>},regs=BPF_Insn_Regs
{src=#<%r0>,dst=#<%r0>},offset=0x0H,imm=struct
{imm64=#<0000000000000000>}}
to
BPF_Insn {opcode=BPF_Insn_Opcode {ldst=#<lddw>},
regs=BPF_Insn_Regs {src=#<%r0>,dst=#<%r0>},
offset=0x0H, imm=struct {imm64=#<0000000000000000>}}
(assuming $COLUMNS = 80).
But I guess this is a different discussion, right?
Yes, but actually I want to support multi-line output as well.
I'm asking because the algorithm used for this purpose in
Common Lisp [1] is not really good: it has the tendency to move to
the right border quickly and then produce many lines of output,
each beginning with 60 or more spaces. There are better ones.
Do you know of some free software program implementing the better ones?