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Merge VarRef into ExprVar

This commit is contained in:
Eelco Dolstra 2013-10-08 14:24:53 +02:00
parent 176c666f36
commit 221a2daf34
4 changed files with 8 additions and 21 deletions
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6
src/libexpr/eval.cc
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@ -310,7 +310,7 @@ void mkPath(Value & v, const char * s)
} }
inline Value * EvalState::lookupVar(Env * env, const VarRef & var, bool noEval) inline Value * EvalState::lookupVar(Env * env, const ExprVar & var, bool noEval)
{ {
for (unsigned int l = var.level; l; --l, env = env->up) ; for (unsigned int l = var.level; l; --l, env = env->up) ;
@ -417,7 +417,7 @@ unsigned long nrAvoided = 0;
Value * ExprVar::maybeThunk(EvalState & state, Env & env) Value * ExprVar::maybeThunk(EvalState & state, Env & env)
{ {
Value * v = state.lookupVar(&env, info, true); Value * v = state.lookupVar(&env, *this, true);
/* The value might not be initialised in the environment yet. /* The value might not be initialised in the environment yet.
In that case, ignore it. */ In that case, ignore it. */
if (v) { nrAvoided++; return v; } if (v) { nrAvoided++; return v; }
@ -607,7 +607,7 @@ void ExprList::eval(EvalState & state, Env & env, Value & v)
void ExprVar::eval(EvalState & state, Env & env, Value & v) void ExprVar::eval(EvalState & state, Env & env, Value & v)
{ {
Value * v2 = state.lookupVar(&env, info, false); Value * v2 = state.lookupVar(&env, *this, false);
state.forceValue(*v2); state.forceValue(*v2);
v = *v2; v = *v2;
} }

2
src/libexpr/eval.hh
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@ -209,7 +209,7 @@ public:
private: private:
inline Value * lookupVar(Env * env, const VarRef & var, bool noEval); inline Value * lookupVar(Env * env, const ExprVar & var, bool noEval);
friend class ExprVar; friend class ExprVar;
friend class ExprAttrs; friend class ExprAttrs;

9
src/libexpr/nixexpr.cc
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@ -38,7 +38,7 @@ void ExprPath::show(std::ostream & str)
void ExprVar::show(std::ostream & str) void ExprVar::show(std::ostream & str)
{ {
str << info.name; str << name;
} }
void ExprSelect::show(std::ostream & str) void ExprSelect::show(std::ostream & str)
@ -174,7 +174,7 @@ void ExprPath::bindVars(const StaticEnv & env)
{ {
} }
void VarRef::bind(const StaticEnv & env) void ExprVar::bindVars(const StaticEnv & env)
{ {
/* Check whether the variable appears in the environment. If so, /* Check whether the variable appears in the environment. If so,
set its level and displacement. */ set its level and displacement. */
@ -204,11 +204,6 @@ void VarRef::bind(const StaticEnv & env)
this->level = withLevel; this->level = withLevel;
} }
void ExprVar::bindVars(const StaticEnv & env)
{
info.bind(env);
}
void ExprSelect::bindVars(const StaticEnv & env) void ExprSelect::bindVars(const StaticEnv & env)
{ {
e->bindVars(env); e->bindVars(env);

12
src/libexpr/nixexpr.hh
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@ -107,7 +107,7 @@ struct ExprPath : Expr
Value * maybeThunk(EvalState & state, Env & env); Value * maybeThunk(EvalState & state, Env & env);
}; };
struct VarRef struct ExprVar : Expr
{ {
Symbol name; Symbol name;
@ -124,15 +124,7 @@ struct VarRef
unsigned int level; unsigned int level;
unsigned int displ; unsigned int displ;
VarRef() { }; ExprVar(const Symbol & name) : name(name) { };
VarRef(const Symbol & name) : name(name) { };
void bind(const StaticEnv & env);
};
struct ExprVar : Expr
{
VarRef info;
ExprVar(const Symbol & name) : info(name) { };
COMMON_METHODS COMMON_METHODS
Value * maybeThunk(EvalState & state, Env & env); Value * maybeThunk(EvalState & state, Env & env);
}; };