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version 2.080.0

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Function std.uni.icmp

Does case insensitive comparison of r1 and r2. Follows the rules of full case-folding mapping. This includes matching as equal german ß with "ss" and other 1:M code point mappings unlike sicmp. The cost of icmp being pedantically correct is slightly worse performance.

int icmp(S1, S2) (
  S1 r1,
  S2 r2
)
if (isForwardRange!S1 && isSomeChar!(ElementEncodingType!S1) && isForwardRange!S2 && isSomeChar!(ElementEncodingType!S2));

Parameters

NameDescription
r1 a forward range of characters
r2 a forward range of characters

Returns

An int that is 0 if the strings match, <0 if str1 is lexicographically "less" than str2, >0 if str1 is lexicographically "greater" than str2

See Also

sicmp cmp

Example

writeln(icmp("Rußland", "Russland")); // 0
writeln(icmp("ᾩ -> \u1F70\u03B9", "\u1F61\u03B9 -> ᾲ")); // 0

Example

By using byUTF and its aliases, GC allocations via auto-decoding and thrown exceptions can be avoided, making icmp @safe @nogc nothrow pure. 

import std.utf : byDchar;

writeln(icmp("Rußland".byDchar, "Russland".byDchar)); // 0
writeln(icmp("ᾩ -> \u1F70\u03B9".byDchar, "\u1F61\u03B9 -> ᾲ".byDchar)); // 0

Authors

Dmitry Olshansky

License

Boost License 1.0.