BorgIv::ExpData Class Reference

provides the 'behind-the-expr' logic of expressions More...

#include <expr.h>

Inherits ReferenceCount.

Inherited by BorgIv::StringData, and BorgIv::TokenData.

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List of all members.

Protected Member Functions
virtual ExpData *	new_copy () const =0
virtual Exp	operator[] (Key *key) const =0
ExpData *	copy_if_necessary ()
Friends
class	Exp

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Detailed Description

provides the 'behind-the-expr' logic of expressions

The content of an expression can be anything as long as it has the proper operations to index is present. The expdata must always be treatable as a constant when residing in an Exp. ExpContent objects are automatically reference counted, which should always work since we should not make circular data structures at all.

Definition at line 94 of file expr.h.

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Member Function Documentation

ExpData* BorgIv::ExpData::copy_if_necessary

(

)

[inline, protected]

if the reference count == 0, then this object will be recreated with the copy operator, otherwise this will be returned;

Definition at line 108 of file expr.h.

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virtual ExpData* BorgIv::ExpData::new_copy

(

)

const [protected, pure virtual]

must return a perfect copy of this. Is used by copy_if_necessary when an object is moved from scratch space to more permanent space

Implemented in BorgIv::StringData, and BorgIv::TokenData.

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virtual Exp BorgIv::ExpData::operator[]

(

Key *

key

)

const [protected, pure virtual]

Implemented in BorgIv::StringData, and BorgIv::TokenData.

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Friends And Related Function Documentation

friend class Exp [friend]

Definition at line 97 of file expr.h.

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The documentation for this class was generated from the following file:

• expr.h