Compile-time calculation: Difference between revisions
add Zig language
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</pre>
Tokenize time can paste text into the source, parse time can inject a limited set of objects into the parse tree (and is used for things like __DATE__, __FILE__ constants).
=={{header|Zig}}==
Zig provides arbitrary CTFE with limitations in IO, memoization and forbidding closures for compilation efficiency.
<lang zig>const std = @import("std");
fn factorial(n: u64) u64 {
var total: u64 = 1;
var i: u64 = 1;
while (i < n + 1) : (i += 1) {
total *= i;
}
return total;
}
pub fn main() void {
@setEvalBranchQuota(1000); // minimum loop quota for backwards branches
const res = comptime factorial(10); // arbitrary Compile Time Function Evaluation
std.debug.print("res: {d}", .{res}); // output only at runtime
}</lang>
Output:
<pre>3628800</pre>
{{omit from|AutoHotkey|AutoHotkey is an interpreted language - the 'compiler' (separate from the interpreter) just bundles the interpreter and the code inside an EXE, so this sort of thing isn't possible}}
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