view lphobos/std/array.d @ 1418:f5f8c21ce6ef

Make "`aa[key]`" use the same runtime call as "`key in aa`". The runtime calls these were using were different, but with equivalent definitions. With `ldc -O3`, the following functions now all compile to the exact same code: {{{ int[int] y; void foo(int x) { if (x in y) { auto z = x in y; sink(*z); } } void bar(int x) { if (x in y) { sink(y[x]); } } void baz(int x) { if (auto p = x in y) { sink(*p); } } }}}
author Frits van Bommel <fvbommel wxs.nl>
date Mon, 25 May 2009 12:50:40 +0200
parents fd32135dca3e
children
line wrap: on
line source


module std.array;

private import std.c.stdio;

class ArrayBoundsError : Error
{
  private:

    uint linnum;
    char[] filename;

  public:
    this(char[] filename, uint linnum)
    {
	this.linnum = linnum;
	this.filename = filename;

	char[] buffer = new char[19 + filename.length + linnum.sizeof * 3 + 1];
	int len;
	len = sprintf(buffer.ptr, "ArrayBoundsError %.*s(%u)", filename, linnum);
	super(buffer[0..len]);
    }
}


/********************************************
 * Called by the compiler generated module assert function.
 * Builds an ArrayBoundsError exception and throws it.
 */

extern (C) static void _d_array_bounds(char[] filename, uint line)
{
    //printf("_d_assert(%s, %d)\n", (char *)filename, line);
    ArrayBoundsError a = new ArrayBoundsError(filename, line);
    //printf("assertion %p created\n", a);
    throw a;
}