view tests/mini/bug61.d @ 1275:bedf0bfb8fdb

Implement first D-specific optimization pass: -simplify-drtcalls. It uses the machinery of the standard -simplify-libcalls pass, but optimizes calls to the D runtime instead of calls to C libraries. At the moment, these optimizations are implemented by this pass: - Avoid the runtime call for `arr.length = newlen` if it can determine that the new length isn't longer than the old one. - Ditto for `cast(T[]) arr` if it will clearly always succeed. (e.g. if the length of the original array is zero, or if the old element size is a multiple of the new element size)
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 28 Apr 2009 21:58:06 +0200
parents 1bb99290e03a
children
line wrap: on
line source

module bug61;
extern(C) int printf(char*, ...);

void main()
{
    int[3] a = [42,4,141414];
    printf("empty:\n");
    foreach(v; a[3..$]) {
        printf("int = %d\n", v);
    }
    printf("one element:\n");
    foreach(v; a[2..$]) {
        printf("int = %d\n", v);
    }
    printf("all elements:\n");
    foreach(v; a) {
        printf("int = %d\n", v);
    }
    printf("empty reversed:\n");
    foreach_reverse(v; a[3..$]) {
        printf("int = %d\n", v);
    }
    printf("all elements reversed:\n");
    foreach_reverse(v; a) {
        printf("int = %d\n", v);
    }
}