diff options
Diffstat (limited to 'src/libexpr')
| -rw-r--r-- | src/libexpr/eval-test.cc | 104 |
1 files changed, 51 insertions, 53 deletions
diff --git a/src/libexpr/eval-test.cc b/src/libexpr/eval-test.cc index e45d682a8721..aafb07d3c546 100644 --- a/src/libexpr/eval-test.cc +++ b/src/libexpr/eval-test.cc @@ -75,6 +75,28 @@ struct Value }; +static void mkThunk(Value & v, Env & env, Expr expr) +{ + v.type = tThunk; + v.thunk.env = &env; + v.thunk.expr = expr; +} + + +static void mkInt(Value & v, int n) +{ + v.type = tInt; + v.integer = n; +} + + +static void mkBool(Value & v, bool b) +{ + v.type = tBool; + v.boolean = b; +} + + std::ostream & operator << (std::ostream & str, Value & v) { switch (v.type) { @@ -176,13 +198,6 @@ static Value * lookupVar(Env * env, Sym name) } -static void setBoolValue(Value & v, bool b) -{ - v.type = tBool; - v.boolean = b; -} - - static bool eqValues(Value & v1, Value & v2) { forceValue(v1); @@ -220,13 +235,13 @@ unsigned long nrValues = 0, nrEnvs = 0; static Value * allocValues(unsigned int count) { nrValues += count; - return new Value[count];// !!! check destructor + return new Value[count]; // !!! check destructor } -static Env * allocEnv() +static Env & allocEnv() { nrEnvs++; - return new Env; + return *(new Env); } @@ -250,8 +265,7 @@ static void eval(Env & env, Expr e, Value & v) int n; if (matchInt(e, n)) { - v.type = tInt; - v.integer = n; + mkInt(v, n); return; } @@ -264,28 +278,24 @@ static void eval(Env & env, Expr e, Value & v) if (!matchBind(*i, name, e2, pos)) abort(); /* can't happen */ Value & v2 = (*v.attrs)[name]; nrValues++; - v2.type = tThunk; - v2.thunk.env = &env; - v2.thunk.expr = e2; + mkThunk(v2, env, e2); } return; } ATermList rbnds, nrbnds; if (matchRec(e, rbnds, nrbnds)) { - Env * env2 = allocEnv(); - env2->up = &env; + Env & env2(allocEnv()); + env2.up = &env; v.type = tAttrs; - v.attrs = &env2->bindings; + v.attrs = &env2.bindings; ATerm name, e2, pos; for (ATermIterator i(rbnds); i; ++i) { if (!matchBind(*i, name, e2, pos)) abort(); /* can't happen */ - Value & v2 = env2->bindings[name]; + Value & v2 = env2.bindings[name]; nrValues++; - v2.type = tThunk; - v2.thunk.env = env2; - v2.thunk.expr = e2; + mkThunk(v2, env2, e2); } return; @@ -327,9 +337,7 @@ static void eval(Env & env, Expr e, Value & v) unsigned int arity = primOp->primOp.arity; Value vLastArg; - vLastArg.type = tThunk; - vLastArg.thunk.env = &env; - vLastArg.thunk.expr = arg; + mkThunk(vLastArg, env, arg); /* Put all the arguments in an array. */ Value * vArgs[arity]; @@ -343,9 +351,7 @@ static void eval(Env & env, Expr e, Value & v) } else { Value * v2 = allocValues(2); v2[0] = v; - v2[1].type = tThunk; - v2[1].thunk.env = &env; - v2[1].thunk.expr = arg; + mkThunk(v2[1], env, arg); v.type = tPrimOpApp; v.primOpApp.left = &v2[0]; v.primOpApp.right = &v2[1]; @@ -356,17 +362,15 @@ static void eval(Env & env, Expr e, Value & v) if (v.type != tLambda) throw TypeError("expected function"); - Env * env2 = allocEnv(); - env2->up = &env; + Env & env2(allocEnv()); + env2.up = &env; ATermList formals; ATerm ellipsis; if (matchVarPat(v.lambda.pat, name)) { - Value & vArg = env2->bindings[name]; + Value & vArg = env2.bindings[name]; nrValues++; - vArg.type = tThunk; - vArg.thunk.env = &env; - vArg.thunk.expr = arg; + mkThunk(vArg, env, arg); } else if (matchAttrsPat(v.lambda.pat, formals, ellipsis, name)) { @@ -376,7 +380,7 @@ static void eval(Env & env, Expr e, Value & v) if (name == sNoAlias) vArg = &vArg_; else { - vArg = &env2->bindings[name]; + vArg = &env2.bindings[name]; nrValues++; } @@ -394,16 +398,14 @@ static void eval(Env & env, Expr e, Value & v) Bindings::iterator j = vArg->attrs->find(name); - Value & v = env2->bindings[name]; + Value & v = env2.bindings[name]; nrValues++; if (j == vArg->attrs->end()) { if (!matchDefaultValue(def2, def)) def = 0; if (def == 0) throw TypeError(format("the argument named `%1%' required by the function is missing") % aterm2String(name)); - v.type = tThunk; - v.thunk.env = env2; - v.thunk.expr = def; + mkThunk(v, env2, def); } else { attrsUsed++; v.type = tCopy; @@ -421,21 +423,21 @@ static void eval(Env & env, Expr e, Value & v) else abort(); - eval(*env2, v.lambda.body, v); + eval(env2, v.lambda.body, v); return; } Expr attrs; if (matchWith(e, attrs, body, pos)) { - Env * env2 = allocEnv(); - env2->up = &env; + Env & env2(allocEnv()); + env2.up = &env; - Value & vAttrs = env2->bindings[sWith]; + Value & vAttrs = env2.bindings[sWith]; nrValues++; eval(env, attrs, vAttrs); if (vAttrs.type != tAttrs) throw TypeError("`with' should evaluate to an attribute set"); - eval(*env2, body, v); + eval(env2, body, v); return; } @@ -443,25 +445,22 @@ static void eval(Env & env, Expr e, Value & v) v.type = tList; v.list.length = ATgetLength(es); v.list.elems = allocValues(v.list.length); - for (unsigned int n = 0; n < v.list.length; ++n, es = ATgetNext(es)) { - v.list.elems[n].type = tThunk; - v.list.elems[n].thunk.env = &env; - v.list.elems[n].thunk.expr = ATgetFirst(es); - } + for (unsigned int n = 0; n < v.list.length; ++n, es = ATgetNext(es)) + mkThunk(v.list.elems[n], env, ATgetFirst(es)); return; } if (matchOpEq(e, e1, e2)) { Value v1; eval(env, e1, v1); Value v2; eval(env, e2, v2); - setBoolValue(v, eqValues(v1, v2)); + mkBool(v, eqValues(v1, v2)); return; } if (matchOpNEq(e, e1, e2)) { Value v1; eval(env, e1, v1); Value v2; eval(env, e2, v2); - setBoolValue(v, !eqValues(v1, v2)); + mkBool(v, !eqValues(v1, v2)); return; } @@ -519,8 +518,7 @@ static void prim_add(Value * * args, Value & v) if (args[0]->type != tInt) throw TypeError("integer expected"); forceValue(*args[1]); if (args[1]->type != tInt) throw TypeError("integer expected"); - v.type = tInt; - v.integer = args[0]->integer + args[1]->integer; + mkInt(v, args[0]->integer + args[1]->integer); } |