---
name: "GraphQL::MaybeTypeCheck"
section: "3pm"
platform: "linux"
package: "libgraphql-perl"
version: "0.54-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/GraphQL::MaybeTypeCheck"
---

# GraphQL::MaybeTypeCheck(3pm)

Conditional type-checking at runtime

## NAME

GraphQL::MaybeTypeCheck - Conditional type-checking at runtime

## SYNOPSIS

```
  use GraphQL::MaybeTypeCheck;
  method foo(
    $arg1 Str,
    $arg2 Int
  ) :ReturnType(Map[Str, Int]) {
    # ...
  }
```

## DESCRIPTION

This module **optionally** enables type-checking in the caller as implemented by Function::Parameters and Return::Type depending on whether Devel::StrictMode is activated.

*"Devel::StrictMode" ON*

When Devel::StrictMode is active, this module will import Function::Parameters into the caller with its default configuration. As of writing, this includes checking both argument count and type.

When in strict mode this also `"require"`s Return::Type which registers the `"ReturnType"` attribute.

*"Devel::StrictMode" OFF*

When strict mode is inactive this module still imports `"Function::Parameters"` into the caller however it sets `"fun"` and `"method"` to lax mode and disables argument type checking.

This also installs a no-op `"ReturnType"` attribute so the existing syntax isn't broken.