Support nesting in log()

ngs-lang / ngs

Next Generation Shell (NGS)

https://ngs-lang.org/

GNU General Public License v3.0

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Open ilyash-b opened 3 years ago

ilyash-b commented 3 years ago

Handle situation where called code also does logging. It should be at top level, disregarding of "your" state. This probably rules out dynamic scope implementation (which does not exist in NGS anyway). Edit: not so sure anymore
Should be easy to use
Should align well and integrate well with other facilities in the language

ilyash commented 3 years ago

Maybe: log("Processing file X", ??? log("processing line Y") ???), where ??? stands for undecided syntax

ilyash commented 3 years ago

Maybe without introducing new syntax:

log("reading file X", F(log) {
    # Nested:
    log("reading line 1")
    ...
})

This can automatically add "start" and "end" for the section. Maybe also let know about exception if it occurs in the callback. Sample output:

... reading file X - start
...
... [reading file X] reading line 1
...
... reading file X - end

Likely, debug() and other functions need similar functionality, maybe a generic facility should be developed.

ilyash commented 3 years ago

TODO: Think about integration with different facilities and methods, similar to $(log: ....)