Debug

Phel doesn't come with an integrated debug framework. However, you can debug the values of your functions by dumping their values. And for this, there are some strategies.

println function#

(println (+ 1 1))
# OUTPUT:
2

Native var_dump()#

You can use any php function simply using the php/ prefix, so you can use:

# Dumping a definition by its name
(def v (+ 2 2))
(php/var_dump v)
# OUTPUT:
int(4)

# Directly dumping the result of a function
(php/var_dump (+ 3 3))
# OUTPUT:
int(6)

Additionally, you can call (php/die) to force the execution of the process so that you can debug a particular value on your own rhythm.

Symfony dumper: dump() & dd()#

Symfony has an awesome VarDumper Component which you can use in your phel projects as well. You can install it by using composer, under your require-dev dependencies.

"require-dev": {
    "symfony/var-dumper": "^5.4"
},

And then, the same drill, you can dump() a definition by its name or the function result:

(php/dump (+ 4 4))
# OUTPUT:
8

Additionally, you can also use dd() to dump and die the execution of the program as soon as it reaches that point:

(php/dd (+ 5 5))
# OUTPUT:
10