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#include "stdafx.h"
#include "Visibility.h"
#include "Named.h"
#include "Type.h"
#include "Package.h"
#include "Engine.h"
namespace storm {
/**
* Utilities.
*/
// Find the first parent of 'at' that is of type T. This includes 'at' itself.
template <class T>
static MAYBE(T *) firstOf(NameLookup *at) {
T *result = as<T>(at);
while (at && !result) {
at = at->parent();
result = as<T>(at);
}
return result;
}
// Fidn the first parent of 'at' that is of type T, excluding 'at'.
template <class T>
static MAYBE(T *) firstParent(NameLookup *at) {
if (at)
return firstOf<T>(at->parent());
else
return null;
}
/**
* Base class.
*/
Visibility::Visibility() {}
Bool Visibility::visible(Named *check, NameLookup *source) {
assert(false, L"Override Visibility::visible!");
return false;
}
/**
* Public.
*/
Public::Public() {}
Bool Public::visible(Named *check, NameLookup *source) {
return true;
}
void Public::toS(StrBuf *to) const {
*to << S("public");
}
/**
* Private within types.
*/
TypePrivate::TypePrivate() {}
Bool TypePrivate::visible(Named *check, NameLookup *source) {
Type *type = firstParent<Type>(check);
return source->hasParent(type);
}
void TypePrivate::toS(StrBuf *to) const {
*to << S("private");
}
/**
* Protected.
*/
TypeProtected::TypeProtected() {}
Bool TypeProtected::visible(Named *check, NameLookup *source) {
Type *type = firstParent<Type>(check);
Type *src = firstOf<Type>(source);
if (!type || !src)
return false;
return src->isA(type);
}
void TypeProtected::toS(StrBuf *to) const {
*to << S("protected");
}
/**
* Private within a package.
*/
PackagePrivate::PackagePrivate() {}
Bool PackagePrivate::visible(Named *check, NameLookup *source) {
Package *package = firstParent<Package>(check);
return source->hasParent(package);
}
void PackagePrivate::toS(StrBuf *to) const {
*to << S("package private");
}
/**
* Private within a file.
*/
FilePrivate::FilePrivate() {}
static SrcPos findPos(NameLookup *source) {
while (source) {
if (LookupPos *n = as<LookupPos>(source))
return n->pos;
source = source->parent();
}
return SrcPos();
}
Bool FilePrivate::visible(Named *check, NameLookup *source) {
SrcPos src = findPos(source);
// If both come from unknown files, they are probably not from the same file.
if (!check->pos.file || !src.file)
return false;
// If they are the same object, we don't need the expensive equal-check.
if (check->pos.file == src.file)
return true;
return *check->pos.file == *src.file;
}
void FilePrivate::toS(StrBuf *to) const {
*to << S("file private");
}
/**
* Object access.
*/
Visibility *STORM_NAME(allPublic, public)(EnginePtr e) {
return e.v.visibility(Engine::vPublic);
}
Visibility *typePrivate(EnginePtr e) {
return e.v.visibility(Engine::vTypePrivate);
}
Visibility *typeProtected(EnginePtr e) {
return e.v.visibility(Engine::vTypeProtected);
}
Visibility *packagePrivate(EnginePtr e) {
return e.v.visibility(Engine::vPackagePrivate);
}
Visibility *filePrivate(EnginePtr e) {
return e.v.visibility(Engine::vFilePrivate);
}
}
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