Because Mythryl compiles optimized native code, and because it has an extraordinarily expressive syntax, facilities which must be hardwired in other languages can be — and are — simple library functions in Mythryl.

This means that when you need them to do something different for a given project, you can easily write a replacement, and when you need something entirely new under the sun, you can easily implement that also.

**Example**: In languages ranging from APL to Perl, the operator generating
a list or vector of sequential integers is hardwired into the compiler
parser and code generator. The Mythryl version is the double-dot operator:

linux$ my eval: 0..9 [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]

And here is its implementation:

# Given 1 .. 10, # return [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ] # fun i .. j = make_arithmetic_sequence (i, j, []) where fun make_arithmetic_sequence (i, j, result_so_far) = i > j ?? result_so_far :: make_arithmetic_sequence (i, j - 1, j ! result_so_far); end;

**Example**: Mythryl supports programmer-defined infix, prefix, postfix and
circumfix operators. This allows more natural notation for a variety of
programming constructs. For example absolute value may be written `|x|`.
Here is a definition of factorial taken directly from the Mythryl standard library:

fun 0! => 1; n! => n * (n - 1)! ; end;

Comments and suggestions to: bugs@mythryl.org