37d1b1cafd
packages (provided that they have a `meta.description' attribute). E.g., $ ./src/nix-env/nix-env -qa --description gcc gcc-4.0.2 GNU Compiler Collection, 4.0.x (cross-compiler for sparc-linux) gcc-4.0.2 GNU Compiler Collection, 4.0.x (cross-compiler for mips-linux) gcc-4.0.2 GNU Compiler Collection, 4.0.x (cross-compiler for arm-linux) gcc-4.0.2 GNU Compiler Collection, 4.0.x
65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
#ifndef __EVAL_H
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#define __EVAL_H
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#include <map>
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#include "aterm.hh"
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#include "hash.hh"
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#include "nixexpr.hh"
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typedef map<Path, PathSet> DrvRoots;
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typedef map<Path, Hash> DrvHashes;
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/* Cache for calls to addToStore(); maps source paths to the store
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paths. */
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typedef map<Path, Path> SrcToStore;
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struct EvalState;
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/* Note: using a ATermVector is safe here, since when we call a primop
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we also have an ATermList on the stack. */
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typedef Expr (* PrimOp) (EvalState &, const ATermVector & args);
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struct EvalState
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{
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ATermMap normalForms;
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ATermMap primOps;
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DrvRoots drvRoots;
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DrvHashes drvHashes; /* normalised derivation hashes */
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SrcToStore srcToStore;
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Expr blackHole;
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unsigned int nrEvaluated;
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unsigned int nrCached;
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EvalState();
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void addPrimOps();
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void addPrimOp(const string & name,
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unsigned int arity, PrimOp primOp);
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};
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MakeError(EvalError, Error)
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MakeError(AssertionError, EvalError)
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/* Evaluate an expression to normal form. */
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Expr evalExpr(EvalState & state, Expr e);
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/* Evaluate an expression read from the given file to normal form. */
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Expr evalFile(EvalState & state, const Path & path);
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/* Specific results. */
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string evalString(EvalState & state, Expr e);
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Path evalPath(EvalState & state, Expr e);
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ATermList evalList(EvalState & state, Expr e);
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ATerm coerceToString(Expr e);
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/* Print statistics. */
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void printEvalStats(EvalState & state);
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#endif /* !__EVAL_H */
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