forked from lix-project/lix
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
#ifndef __EVAL_H
|
|
#define __EVAL_H
|
|
|
|
#include <map>
|
|
|
|
#include "aterm.hh"
|
|
#include "hash.hh"
|
|
#include "nixexpr.hh"
|
|
|
|
|
|
typedef map<Path, PathSet> DrvRoots;
|
|
typedef map<Path, Hash> DrvHashes;
|
|
|
|
/* Cache for calls to addToStore(); maps source paths to the store
|
|
paths. */
|
|
typedef map<Path, Path> SrcToStore;
|
|
|
|
struct EvalState;
|
|
|
|
/* Note: using a ATermVector is safe here, since when we call a primop
|
|
we also have an ATermList on the stack. */
|
|
typedef Expr (* PrimOp) (EvalState &, const ATermVector & args);
|
|
|
|
|
|
struct EvalState
|
|
{
|
|
ATermMap normalForms;
|
|
ATermMap primOps;
|
|
DrvRoots drvRoots;
|
|
DrvHashes drvHashes; /* normalised derivation hashes */
|
|
SrcToStore srcToStore;
|
|
|
|
unsigned int nrEvaluated;
|
|
unsigned int nrCached;
|
|
|
|
EvalState();
|
|
|
|
void addPrimOps();
|
|
void addPrimOp(const string & name,
|
|
unsigned int arity, PrimOp primOp);
|
|
};
|
|
|
|
|
|
/* 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);
|
|
bool evalBool(EvalState & state, Expr e);
|
|
ATermList evalList(EvalState & state, Expr e);
|
|
ATerm coerceToString(Expr e);
|
|
|
|
/* Contexts. */
|
|
string coerceToStringWithContext(EvalState & state,
|
|
ATermList & context, Expr e, bool & isPath);
|
|
Expr wrapInContext(ATermList context, Expr e);
|
|
|
|
/* Automatically call a function for which each argument has a default
|
|
value or has a binding in the `args' map. Note: result is a call,
|
|
not a normal form; it should be evaluated by calling evalExpr(). */
|
|
Expr autoCallFunction(Expr e, const ATermMap & args);
|
|
|
|
/* Print statistics. */
|
|
void printEvalStats(EvalState & state);
|
|
|
|
|
|
#endif /* !__EVAL_H */
|