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[#BB2473EDDB14F803374CD9B0CF692678FF54F8E0]

= Function to_lower

pass:v,q[Return c converted to lowercase]


== Synopsis

Declared in header `</boost/url/grammar/ci_string.hpp#L53[boost/url/grammar/ci_string.hpp,window=blank_]>`

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

== Description

pass:v,q[This function returns the character,] pass:v,q[converting it to lowercase if it is]
pass:v,q[uppercase.]
pass:v,q[The function is defined only for]
pass:v,q[low-ASCII characters.]

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

=== Exception Safety
pass:v,q[Throws nothing.]



== Return Value

* `char` 


== Parameters

|===
| Name | Type 

| *c*
| `char`

|===