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); } } }}}

#ifndef __LDC_IR_IRSYMBOL_H__
#define __LDC_IR_IRSYMBOL_H__

#include "ir/ir.h"

/// Base class for all symbols.
class IrSymbol
{
public:
    ///
    IrSymbol(Ir* ir) : ir(ir) {}

    /// Migrate symbols to current module if necessary.
    virtual void migrate() = 0;

protected:
    ///
    Ir* ir;
};

#endif