layouts.md
In logger: A Lightweight, Modern and Flexible Logging Utility

JSON layout warns if you include msg

Code
  layout <- layout_json(fields = "msg")
Condition
  Warning in `layout_json()`:
  'msg' is always automatically included

must throw errors

Code
  layout_simple(FOOBAR)
Condition
  Error:
  ! object 'FOOBAR' not found
Code
  layout_simple(42)
Condition
  Error in `layout_simple()`:
  ! argument "msg" is missing, with no default
Code
  layout_simple(msg = "foobar")
Condition
  Error in `layout_simple()`:
  ! argument "level" is missing, with no default

Code
  layout_glue(FOOBAR)
Condition
  Error:
  ! object 'FOOBAR' not found
Code
  layout_glue(42)
Condition
  Error in `layout_glue()`:
  ! Invalid log level, see ?log_levels
Code
  layout_glue(msg = "foobar")
Condition
  Error in `layout_glue()`:
  ! argument "level" is missing, with no default
Code
  layout_glue(level = 53, msg = "foobar")
Condition
  Error in `layout_glue()`:
  ! Invalid log level, see ?log_levels

log_info() captures local info

Code
  log_info("foobar")
Output
  logger / global / logger / eval / eval(expr, envir)
Code
  f()
Output
  logger / global / logger / f / f()
Code
  g()
Output
  logger / global / logger / f / f()

log_info() captures package info

Code
  logger_tester_function(INFO, "x = ")
Output
  logger.tester INFO x =  0.0807501375675201
Code
  logger_info_tester_function("everything = ")
Output
  logger.tester INFO everything =  42