Reveal type in Crystal

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Recently I came across reveal_type from Sorbet as a way to inspect the type of an expression, thanks Brian Hicks. I wondered if that can be ported to Crystal. You can jump to the conclusions section if you want to copy-paste the good-enough™️ solution in your project.

Inspecting the type of an expression is a reasonable question to ask. When the program compiles, the compiler knows the answer for sure.

Let’s start working with a relatively simple example grabbed from Sorbet’s documentation.

def maybe(x, def<span cla...

Get the full details here: Reveal type in Crystal - The Crystal Programming Language