[#LLVM_YAML_STRONG_TYPEDEF]
= LLVM_YAML_STRONG_TYPEDEF
:mrdocs:

Define a distinct strong typedef `_type` over integral base `_base.`

== Synopsis

Declared in `<llvm/Support/YAMLTraits.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
#define LLVM_YAML_STRONG_TYPEDEF(_base, _type)

----

== Description

YAML I/O does conversion based on types. But often native data types are just a typedef of built in intergral types (e.g. int). But the C++ type matching system sees through the typedef and all the typedefed types look like a built in type. This will cause the generic YAML I/O conversion to be used. To provide better control over the YAML conversion, you can use this macro instead of typedef. It will create a class with one field and automatic conversion operators to and from the base type. Based on BOOST_STRONG_TYPEDEF

== Parameters

[cols="1,4"]
|===
| Name| Description
| *_base*
| Underlying integral type.
| *_type*
| Name of the strong typedef to define.
|===


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