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


Return the case‐insensitive comparison of s0 and s1

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/ci_string.hpp#L120[boost/url/grammar/ci_string.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ci_compare(
    core::string_view s0,
    core::string_view s1) noexcept;
----

== Description


This returns the lexicographical comparison    of two strings, ignoring case.    The function is defined only for strings    containing low‐ASCII characters.


=== Example

[,cpp]
----
assert( ci_compare( "boost", "Boost" ) == 0 );
----

=== Exception Safety

Throws nothing.



== Return Value


0 if the strings are equal, ‐1 if    `s0` is less than `s1`, or 1 if `s0` is    greater than s1.



== Parameters


|===
| Name | Description

| *s0*
| The first string


| *s1*
| The second string


|===

== See Also


xref:boost/urls/grammar/ci_is_equal-0a.adoc[ci_is_equal],        xref:boost/urls/grammar/ci_is_less.adoc[ci_is_less].






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