How do I convert List of Macros in to String in Elixir

Question

I have a list of macros in Elixir and trying to put quotes around it, please help me.

I want to convert [Id, Node, Timestamp] into "[Id, Node, Timestamp]".

How would I do that?

What have you tried so far?

Máté
– Máté

2018-12-19 20:11:42 +00:00
Commented Dec 19, 2018 at 20:11 — Máté
– Máté, Commented Dec 19, 2018 at 20:11

Aleksei Matiushkin · Accepted Answer · 2018-12-20 06:01:45Z

2

[Id, Node, Timestamp] is a list of atoms not a list of macros.

Atoms are plain terms and hence plain old good Kernel.inspect/2 would perfectly do.

inspect [Id, Node, Timestamp]
#⇒ "[Id, Node, Timestamp]"

answered Dec 20, 2018 at 6:01

Aleksei Matiushkin

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Comments

Brett Beatty · Accepted Answer · 2018-12-20 16:48:31Z

1

If you have a quoted expression, I believe Macro.to_string/2 is what you're looking for.

iex> ast = quote do: [Id, Node, Timestamp]
[Id, Node, Timestamp]
iex> Macro.to_string(ast)
"[Id, Node, Timestamp]"

Like Aleksei pointed out, however, the AST for a list of atoms is itself, so if that's all you're trying to convert to a string, Kernel.inspect/2 accomplishes the same thing.

edited Dec 20, 2018 at 16:48

answered Dec 19, 2018 at 20:11

Brett Beatty

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2 Comments

Aleksei Matiushkin Over a year ago

Quoting a list of atoms makes zero sense since both lists and atoms are already quoted expressions, equal to their AST. Macro.to_string([Id, Node, Timestamp]) has the same effect.

nitinjain110588 Over a year ago

Macro.to_string(ast) helped. Thanks!

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