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


Return true if s0 is less than s1 using case‐insensitive comparison

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/ci_string.hpp#L227[boost/url/grammar/ci_string.hpp]>`

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

== Description


The comparison algorithm implements a    case‐insensitive total order on the set    of all strings; however, it is not a    lexicographical comparison.    The function is defined only for strings    containing low‐ASCII characters.


=== Example

[,cpp]
----
assert( ! ci_is_less( "Boost", "boost" ) );
----


== See Also


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






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