## LightweightOutputStream

### Description

LightweightOutputStream is a concept describing a `std::ostream`-like class with
a reduced set of operations.

While convenient, `std::ostream` and its implementations constitute a sizeable
piece of code, which may make it unsuitable for certain applications. OpenMethod
uses a small subset of the operations supported by `std::ostream`. By default,
the library uses a lightweight implementation based on the C stream functions.

Implementations of `LightweightOutputStream` provide the following functions:

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|===

| Name
| Description

| LightweightOutputStream& operator<<(LightweightOutputStream& os, const char* str)
| Write a null-terminated string `str` to `os`

| LightweightOutputStream& operator<<(LightweightOutputStream& os, const std::string_view& view)
| Write a view to `os

| LightweightOutputStream& operator<<(LightweightOutputStream& os, const void* value)
| Write a representation of a pointer to `os`

| LightweightOutputStream& operator<<(LightweightOutputStream& os, std::size_t value)
| Write an unsigned integer to `os`

|===