import std.stdio;

​

import std.encoding;

​

​

void main()

{

    string src;

    // 1-Byte

    writeln( "1-Byte:" );

    src = "Abc";

    foreach ( i, c; codePoints( src ) )

    {

        writeln( i, ": ", c );

    }

​

    // 2-Byte

    writeln( "2-Byte:" );

    src = "Жук";

    foreach ( i, c; codePoints( src ) )

    {

        writeln( i, ": ", c );

    }

​

    // 3-Byte

    writeln( "3-Byte:" );

    src = "ᐅᐅᐅ";

    foreach ( i, c; codePoints( src ) )

    {

        writeln( i, ": ", c );

    }

​

    // Reverse: 1-Byte

    src = "Abc";

    writeln( "Reverse 1-Byte:" );

    foreach_reverse ( i, c; codePoints( src ) )

    {

        writeln( i, ": ", c );

    }

​

    // Reverse: 2-Byte

    writeln( "Reverse 2-Byte:" );

    src = "Жук";

    foreach_reverse ( i, c; codePoints( src ) )

    {

        writeln( i, ": ", c );

    }

​

    // Reverse: 3-Byte

    writeln( "Reverse 3-Byte:" );

    src = "ᐅᐅᐅ";

    foreach_reverse ( i, c; codePoints( src ) )

    {

        writeln( i, ": ", c );

    }

​

    // Get Prev Positions of last UTF8 Symbol

    // 1-Byte

    writeln( "Prev pos 1-Byte:" );

    src = "Abc";

    string sr = src;

    size_t l = sr.lastSequence;

​

    writeln( l );

​

    // 2-Byte

    writeln( "Prev pos 2-Byte:" );

    src = "Жук";

    sr = src;

    l = sr.lastSequence;

​

    writeln( l );

​

    // 3-Byte

    writeln( "Prev pos 3-Byte:" );

    src = "ᐅᐅᐅ";

    sr = src;

    l = sr.lastSequence;

​

    writeln( l );

    writeln( sr );

​

​

    // Get Next Positions in UTF8 string

    // 1-Byte

    writeln( "Next pos 1-Byte:" );

    src = "Abc";

    sr = src;

    l = sr.index( 1 );

    writeln( l );

​

    // 2-Byte

    writeln( "Next pos 2-Byte:" );

    src = "Жук";

    sr = src;

    l = sr.index( 1 );

    writeln( l );

​

    // 3-Byte

    writeln( "Next pos 3-Byte:" );

    src = "ᐅᐅᐅ";

    sr = src;

    l = sr.index( 1 );

    writeln( l );

    writeln( sr );

​

    // validLength 3-Byte

    writeln( "validLength 3-Byte:" );

    src = "Aᐅᐅᐅ";

    writeln( src[ 0 .. 5 ].validLength() );

}

​