OpenEuphoria

Re: "dumping" a map

• Posted by ghaberek (admin) Feb 20, 2023
• 1305 views

Awhile ago I wrote mvc/mapdbg.e for Euphoria MVC (a web framework I started writing for redoing this website). Mapdbg helps trace out what I was doing with maps and to ensure I was properly freeing objects from eumem. It's meant to be a drop-in replacement for std/map.e that uses uses the debugging features in Euphoria 4.1 to parse your code for map allocations and it logs these events to the console using mvc/logger.e. It also includes a print_map() routine that attempts to nicely display the key/value pairs, and an print_maps() routine that will print all of the maps currently allocated. I plan to pull mvc/logger.e into Euphoria 4.2 but if it's useful, I will pull in mvc/mapdbg.e as well. (These would be moved to the std/ include directory.) If you want to try it out, just copy mvc/mapdbg.e and mvc/logger.e into an mvc/ directory in your project directory and then change your include std/map.e line to include mvc/mapdbg.e. You also need to define MAPDBG for it to do its job and LOG_DEBUG for it to show debug logs.

-- enable debug logging. optional. shows mapdbg looking through your code. 
with define LOG_DEBUG 
include mvc/logger.e 
 
-- enable map debugging. required. tracks map usage and allows print_map() below. 
with define MAPDBG 
include mvc/mapdbg.e as map 
 
object users = map:new() 
map:nested_put( users, {"alice","id"}, "alice" ) 
map:nested_put( users, {"alice","name"}, "Alice" ) 
map:nested_put( users, {"alice","email"}, "alice@example.com" ) 
map:nested_put( users, {"bob","id"}, "bob" ) 
map:nested_put( users, {"bob","name"}, "Bob" ) 
map:nested_put( users, {"bob","email"}, "bob@example.com" ) 
map:nested_put( users, {"carol","id"}, "carol" ) 
map:nested_put( users, {"carol","name"}, "Carol" ) 
map:nested_put( users, {"carol","email"}, "carol@example.com" ) 
 
ifdef MAPDBG then 
    print_map( users, /* nested = */ 1 ) 
end ifdef 

Output:

users@/maptest3.ex:9 (map #3) = { 
     3: {0x24D62C12,"bob",  map #5 = { 
       1: {0x369D9230,"id","bob"}, 
      10: {0x36DEAD19,"email","bob@example.com"}, 
      12: {0x0EAAA6CB,"name","Bob"}, 
  } 
}, 
    10: {0x1C0FF609,"carol",  map #6 = { 
       1: {0x369D9230,"id","carol"}, 
      10: {0x36DEAD19,"email","carol@example.com"}, 
      12: {0x0EAAA6CB,"name","Carol"}, 
  } 
}, 
    15: {0x053F7D1E,"alice",  map #4 = { 
       1: {0x369D9230,"id","alice"}, 
      10: {0x36DEAD19,"email","alice@example.com"}, 
      12: {0x0EAAA6CB,"name","Alice"}, 
  } 
}, 
} 

I've been revisiting IUP lately and it has a few options for easily creating a tabbed interface with grids of data. I'd be glad to help you out with that when you're ready.

Nope, sorry. Runtime errors crash. But you can use crash_routine to "catch" that crash before your program exits completely. When your crash routine is called, Euphoria has already written its ex.err so you can open and read that file if you need.

-Greg