wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-06-26 20:01:15 +02:00
Code Activity

* Use a symbol table to represent identifiers and attribute names

Browse source 
efficiently.  The symbol table ensures that there is only one copy
  of each symbol, thus allowing symbols to be compared efficiently
  using a pointer equality test.
This commit is contained in:
Eelco Dolstra 2010-04-13 12:25:42 +00:00
parent 10e8b1fd15
commit ac1e8f40d4
15 changed files with 228 additions and 101 deletions
Download patch file Download diff file Expand all files Collapse all files

16
src/libexpr/eval.hh
View file

@ -4,6 +4,7 @@
#include <map>
#include "nixexpr.hh"
#include "symbol-table.hh"
namespace nix {
@ -14,9 +15,7 @@ class EvalState;
struct Env;
struct Value;
typedef string Sym;
typedef std::map<Sym, Value> Bindings;
typedef std::map<Symbol, Value> Bindings;
struct Env
@ -161,6 +160,10 @@ class EvalState
public:
DrvHashes drvHashes; /* normalised derivation hashes */
SymbolTable symbols;
const Symbol sWith, sOutPath, sDrvPath, sType, sMeta, sName;
private:
SrcToStore srcToStore;
@ -235,6 +238,13 @@ private:
void addPrimOp(const string & name,
unsigned int arity, PrimOp primOp);
Value * lookupVar(Env * env, const Symbol & name);
Value * lookupWith(Env * env, const Symbol & name);
friend class ExprVar;
friend class ExprAttrs;
public:
/* Do a deep equality test between two values. That is, list