missing filters: $__loc__, input_filename, input_line_number

[pkoppstein]

The following appear to be undefined in gojq but are documented in detail on the jq "man" page.

$__loc__
input_filename
input_line_number

lgamma_r is not mentioned on that page, but lgamma is.

Other filters that are listed by jq's builtins but not gojq's:

<   "get_jq_origin/0"
<   "get_prog_origin/0"
<   "get_search_list/0"
<   "scalars_or_empty/0"

[itchyny]

Sorry but these are unlikely to be implemented in gojq.

[pkoppstein]

I hope you won't mind if I try to persuade you to reconsider input_filename. My main motivation is simply utility. I realize it may not be useful to you but hopefully the implementation would be trivial for you, and I assume that you have invested the time in developing gojq at least in part because of its potential utility to others.

In my own work, I use input_filename in order to have fast JSON-oriented grep-like functionality. For example, given a directory with thousands of JSON files, which ones contain JSON matching a complex condition?

Of course I realize that input_filename is not absolutely necessary for this functionality, but my library already uses it freely, which gets back to the point about consistency with jq's published "specification", at least in regard to useful functionality ....

[itchyny]

I've just implemented input_filename/0. Please confirm the behavior.

[pkoppstein]

Wonderful! But there is strange bug.

On the one hand, as expected:

$ echo 3 | jqMaster . -
3

But on the other:

$ echo 3 | gojqMaster input_filename one.json two.json -
echo 3 | gojqMaster input_filename one.json two.json -
"one.json"
"two.json"
gojq: open -: no such file or directory

For reference:

$ echo 3 | jq input_filename one.json two.json -
"one.json"
"two.json"
"<stdin>"

[itchyny]

I implemented hyphen for stdin support.