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#pragma once
#include "Compiler/NamedThread.h"
#include "Core/SrcPos.h"
namespace storm {
namespace syntax {
STORM_PKG(lang.bnf);
/**
* Base class for all syntax nodes. This class will be overridden by 'Rule' to add the
* 'transform' function and then by 'Production' to implement the 'transform' function for that
* specific option.
*/
class Node : public ObjectOn<Compiler> {
STORM_CLASS;
public:
STORM_CTOR Node();
STORM_CTOR Node(SrcPos pos);
// Start position for this node.
SrcPos pos;
// Throw an exception. Used when calling 'transform' from a pure Rule object.
void CODECALL throwError();
/**
* Introspection:
*/
// Get all direct children in this node as an array.
virtual Array<Node *> *STORM_FN children();
// Get all children (both direct and indirect) as a flat array.
Array<Node *> *STORM_FN allChildren();
// Get all children of a specific type as a plain array.
Array<Node *> *STORM_FN allChildren(Type *type);
private:
// Internal helper for 'allChildren'.
void allChildren(Array<Node *> *to, MAYBE(Type *) type);
};
/**
* Transform syntax nodes in C++. Assumes the result is a pointer.
*/
// Find the appropriate 'transform' function in a specific type. If 'param' is void, no
// params are assumed except the this pointer.
const void *transformFunction(Type *type, const Value &result, const Value ¶m1, const Value ¶m2);
template <class R>
R *transformNode(Node *node) {
Engine &e = node->engine();
const void *fn = transformFunction(runtime::typeOf(node), Value(StormInfo<R>::type(e)), Value(), Value());
os::FnCall<R *> p = os::fnCall().add(node);
return p.call(fn, true);
}
template <class R, class P>
R *transformNode(Node *node, P par) {
Engine &e = node->engine();
const void *fn = transformFunction(runtime::typeOf(node),
Value(StormInfo<R>::type(e)),
Value(StormInfo<P>::type(e)),
Value());
os::FnCall<R *> p = os::fnCall().add(node).add(par);
return p.call(fn, true);
}
template <class R, class P, class Q>
R *transformNode(Node *node, P par1, Q par2) {
Engine &e = node->engine();
const void *fn = transformFunction(runtime::typeOf(node),
Value(StormInfo<R>::type(e)),
Value(StormInfo<P>::type(e)),
Value(StormInfo<Q>::type(e)));
os::FnCall<R *> p = os::fnCall().add(node).add(par1).add(par2);
return p.call(fn, true);
}
}
}
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