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Example code of hhvm/type-assert

Informations about the package type-assert

TypeAssert

Continuous Integration

Hack library for converting untyped data to typed data.

Warning for TypeAssert\matches_type_structure()

TypeStructure<T>, type_structure(), and ReflectionTypeAlias::getTypeStructures() are experimental features of HHVM, and not supported by Facebook or the HHVM team. This means that matches_type_structure() may need to be removed in a future release without warning.

We strongly recommend moving to TypeAssert\matches<T>() and TypeCoerce\match<T>() instead.

Installation

Usage

TypeAssert provides functions that take a mixed input, and will either return it unmodified (but with type data) or throw an exception; for example:

These include:

Coercion

TypeAssert also contains the Facebook\TypeCoerce namespace, which includes a similar set of functions:

These will do 'safe' transformations, such as int-ish strings to int, ints to strings, arrays to vecs, arrays to dicts, and so on.

TypeSpec

You can also assert/coerce complex types (except for shapes and tuples) without a type_structure:

Shapes and tuples are not supported, as they can not be expressed generically.

matches_type_structure<T>(TypeStructure<T>, mixed): T

Asserts that a variable matches the given type structure; these can be arbitrary nested shapes. This is particular useful for dealing with JSON responses.

You can use type_structure() to get a TypeStructure<T> for a type constant, or ReflectionTypeAlias::getTypeStructure() for top-level type aliases.

not_null<T>(?T): T

Throws if it's null, and refines the type otherwise - for example:

is_instance_of<T>(classname<T>, mixed): T

Asserts that the input is an object of the given type; for example:

is_classname_of<T>(classname<T>, mixed): classname<T>

Asserts that the input is the name of a child of the specified class, or implements the specified interface.

Credit

This library is a reimplementation of ideas from:

Security Issues

We use GitHub issues to track public bugs. Please ensure your description is clear and has sufficient instructions to be able to reproduce the issue.

Facebook has a bounty program for the safe disclosure of security bugs. In those cases, please go through the process outlined on that page and do not file a public issue.

License

Type-Assert is MIT-licensed.

All versions of type-assert with dependencies

PHP Build Version
Package Version
Requires hhvm Version ^4.115
hhvm/hsl Version ^4.0
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