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* After parsing, compute level/displacement pairs for each variable

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use site, allowing environments to be stores as vectors of values
  rather than maps.  This should speed up evaluation and reduce the
  number of allocations.
This commit is contained in:
Eelco Dolstra 2010-04-14 14:42:32 +00:00
parent 816dd3f061
commit 9985230c00
7 changed files with 258 additions and 143 deletions
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16
src/libexpr/eval.hh
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@ -18,13 +18,6 @@ struct Value;
typedef std::map<Symbol, Value> Bindings;
struct Env
{
Env * up;
Bindings bindings;
};
typedef enum {
tInt = 1,
tBool,
@ -109,6 +102,13 @@ struct Value
};
struct Env
{
Env * up;
Value values[0];
};
static inline void mkInt(Value & v, int n)
{
v.type = tInt;
@ -258,7 +258,7 @@ public:
/* Allocation primitives. */
Value * allocValues(unsigned int count);
Env & allocEnv();
Env & allocEnv(unsigned int size);
void mkList(Value & v, unsigned int length);
void mkAttrs(Value & v);