nix-super/src/fix-ng/eval.hh
Eelco Dolstra 0690c1c9c0 * Work around problems with the ATerm library.
The ATerm library doesn't search the heap for pointers to ATerms
  when garbage collecting.  As a result, C++ containers such as
  `map<ATerm, ATerm>' will cause pointer to be hidden from the garbage
  collector, causing crashes.  Instead, we now use ATermTables.
2003-11-03 20:30:40 +00:00

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C++

#ifndef __EVAL_H
#define __EVAL_H
#include <map>
#include "fix-expr.hh"
#include "expr.hh"
typedef map<Path, PathSet> DrvPaths;
typedef map<Path, Hash> DrvHashes;
struct EvalState
{
ATermMap normalForms;
DrvPaths drvPaths;
DrvHashes drvHashes; /* normalised derivation hashes */
Expr blackHole;
unsigned int nrEvaluated;
unsigned int nrCached;
EvalState();
};
/* Evaluate an expression to normal form. */
Expr evalExpr(EvalState & state, Expr e);
/* Evaluate an expression read from the given file to normal form. */
Expr evalFile(EvalState & state, const Path & path);
/* Specific results. */
string evalString(EvalState & state, Expr e);
Path evalPath(EvalState & state, Expr e);
/* Print statistics. */
void printEvalStats(EvalState & state);
#endif /* !__EVAL_H */