[#boost-urls-grammar-to_upper]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/grammar.adoc[grammar]::to_upper
:relfileprefix: ../../../
:mrdocs:


Return c converted to uppercase

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/ci_string.hpp#L83[boost/url/grammar/ci_string.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
char
to_upper(char c) noexcept;
----

== Description


This function returns the character,    converting it to uppercase if it is    lowercase.    The function is defined only for    low‐ASCII characters.


=== Example

[,cpp]
----
assert( to_upper( 'a' ) == 'A' );
----

=== Exception Safety

Throws nothing.



== Return Value


The converted character



== Parameters


|===
| Name | Description

| *c*
| The character to convert


|===

== See Also


xref:boost/urls/grammar/to_lower.adoc[to_lower].






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