view lphobos/typeinfo1/ti_creal.d @ 1168:ab186e535e72

A different fix to #218 and DMD2682 that does not lead to constant folding regressions. Fixes run/const_15, run/c/const_16_B. The price is removing the lvalueness of struct literals. If it turns out too much code depends on this behavior or we don't want to break with DMD, we could keep struct literals as lvalues and instead convert struct literals used as expression initializers into struct initializers.
author Christian Kamm <kamm incasoftware de>
date Sun, 29 Mar 2009 11:43:45 +0200
parents 79c9ac745fbc
children
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// creal

module typeinfo1.ti_creal;

class TypeInfo_c : TypeInfo
{
    char[] toString() { return "creal"; }

    hash_t getHash(void *p)
    {
	return (cast(uint *)p)[0] + (cast(uint *)p)[1] +
	       (cast(uint *)p)[2] + (cast(uint *)p)[3] +
	       (cast(uint *)p)[4];
    }

    static int _equals(creal f1, creal f2)
    {
	return f1 == f2;
    }

    static int _compare(creal f1, creal f2)
    {   int result;

	if (f1.re < f2.re)
	    result = -1;
	else if (f1.re > f2.re)
	    result = 1;
	else if (f1.im < f2.im)
	    result = -1;
	else if (f1.im > f2.im)
	    result = 1;
	else
	    result = 0;
        return result;
    }

    int equals(void *p1, void *p2)
    {
	return _equals(*cast(creal *)p1, *cast(creal *)p2);
    }

    int compare(void *p1, void *p2)
    {
	return _compare(*cast(creal *)p1, *cast(creal *)p2);
    }

    size_t tsize()
    {
	return creal.sizeof;
    }

    void swap(void *p1, void *p2)
    {
	creal t;

	t = *cast(creal *)p1;
	*cast(creal *)p1 = *cast(creal *)p2;
	*cast(creal *)p2 = t;
    }

    void[] init()
    {	static creal r;

	return (cast(creal *)&r)[0 .. 1];
    }
}