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//===-- llvm/SymbolTable.h - Implement a type planed symtab -------*- C++ -*-=//
//
// This file implements a symbol table that has planed broken up by type.
// Identical types may have overlapping symbol names as long as they are
// distinct.
//
// Note that this implements a chained symbol table. If a name being 'lookup'd
// isn't found in the current symbol table, then the parent symbol table is
// searched.
//
// This chaining behavior does NOT affect iterators though: only the lookup
// method
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SYMBOL_TABLE_H
#define LLVM_SYMBOL_TABLE_H
#include <vector>
#include <map>
#include <string>
class Value;
class Type;
// TODO: Change this back to vector<map<const string, Value *> >
// Make the vector be a data member, and base it on UniqueID's
// That should be much more efficient!
//
class SymbolTable : public map<const Type *, map<const string, Value *> > {
typedef map<const string, Value *> VarMap;
typedef map<const Type *, VarMap> super;
SymbolTable *ParentSymTab;
friend class SymTabValue;
inline void setParentSymTab(SymbolTable *P) { ParentSymTab = P; }
public:
typedef VarMap::iterator type_iterator;
typedef VarMap::const_iterator type_const_iterator;
inline SymbolTable(SymbolTable *P = 0) { ParentSymTab = P; }
~SymbolTable();
SymbolTable *getParentSymTab() { return ParentSymTab; }
// lookup - Returns null on failure...
Value *lookup(const Type *Ty, const string &name);
// find - returns end(Ty->getIDNumber()) on failure...
type_iterator type_find(const Type *Ty, const string &name);
type_iterator type_find(const Value *D);
// insert - Add named definition to the symbol table...
void insert(Value *N);
void remove(Value *N);
Value *type_remove(const type_iterator &It);
inline unsigned type_size(const Type *TypeID) const {
return find(TypeID)->second.size();
}
// Note that type_begin / type_end only work if you know that an element of
// TypeID is already in the symbol table!!!
//
inline type_iterator type_begin(const Type *TypeID) {
return find(TypeID)->second.begin();
}
inline type_const_iterator type_begin(const Type *TypeID) const {
return find(TypeID)->second.begin();
}
inline type_iterator type_end(const Type *TypeID) {
return find(TypeID)->second.end();
}
inline type_const_iterator type_end(const Type *TypeID) const {
return find(TypeID)->second.end();
}
};
#endif
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