diff options
Diffstat (limited to 'src/libexpr')
| -rw-r--r-- | src/libexpr/eval.cc | 23 | ||||
| -rw-r--r-- | src/libexpr/eval.hh | 1 | ||||
| -rw-r--r-- | src/libexpr/primops.cc | 71 |
3 files changed, 37 insertions, 58 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc index ce466ded491f..d259d58a3759 100644 --- a/src/libexpr/eval.cc +++ b/src/libexpr/eval.cc @@ -367,6 +367,14 @@ bool EvalState::evalBool(Env & env, Expr * e) } +void EvalState::evalAttrs(Env & env, Expr * e, Value & v) +{ + eval(env, e, v); + if (v.type != tAttrs) + throwTypeError("value is %1% while an attribute set was expected", showType(v)); +} + + void Expr::eval(EvalState & state, Env & env, Value & v) { abort(); @@ -481,8 +489,7 @@ void ExprVar::eval(EvalState & state, Env & env, Value & v) void ExprSelect::eval(EvalState & state, Env & env, Value & v) { Value v2; - state.eval(env, e, v2); - state.forceAttrs(v2); // !!! eval followed by force is slightly inefficient + state.evalAttrs(env, e, v2); Bindings::iterator i = v2.attrs->find(name); if (i == v2.attrs->end()) throwEvalError("attribute `%1%' missing", name); @@ -499,8 +506,7 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v) void ExprOpHasAttr::eval(EvalState & state, Env & env, Value & v) { Value vAttrs; - state.eval(env, e, vAttrs); - state.forceAttrs(vAttrs); + state.evalAttrs(env, e, vAttrs); mkBool(v, vAttrs.attrs->find(name) != vAttrs.attrs->end()); } @@ -640,8 +646,7 @@ void ExprWith::eval(EvalState & state, Env & env, Value & v) Env & env2(state.allocEnv(1)); env2.up = &env; - state.eval(env, attrs, env2.values[0]); - state.forceAttrs(env2.values[0]); + state.evalAttrs(env, attrs, env2.values[0]); /* If there is an enclosing `with', copy all attributes that don't appear in this `with'. */ @@ -725,13 +730,11 @@ void ExprOpImpl::eval(EvalState & state, Env & env, Value & v) void ExprOpUpdate::eval(EvalState & state, Env & env, Value & v) { Value v2; - state.eval(env, e1, v2); - state.forceAttrs(v2); + state.evalAttrs(env, e1, v2); state.cloneAttrs(v2, v); - state.eval(env, e2, v2); - state.forceAttrs(v2); + state.evalAttrs(env, e2, v2); foreach (Bindings::iterator, i, *v2.attrs) mkCopy((*v.attrs)[i->first], i->second); diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh index 7252cae4b5af..6cdc171f5609 100644 --- a/src/libexpr/eval.hh +++ b/src/libexpr/eval.hh @@ -188,6 +188,7 @@ public: /* Evaluation the expression, then verify that it has the expected type. */ bool evalBool(Env & env, Expr * e); + void evalAttrs(Env & env, Expr * e, Value & v); /* If `v' is a thunk, enter it and overwrite `v' with the result of the evaluation of the thunk. If `v' is a delayed function diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index c4495e81db49..c5579679caf3 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -462,12 +462,11 @@ static void prim_derivationStrict(EvalState & state, Value * * args, Value & v) static void prim_toPath(EvalState & state, Value * * args, Value & v) { PathSet context; - string path = state.coerceToPath(*args[0], context); + Path path = state.coerceToPath(*args[0], context); mkString(v, canonPath(path), context); } -#if 0 /* Allow a valid store path to be used in an expression. This is useful in some generated expressions such as in nix-push, which generates a call to a function with an already existing store path @@ -479,16 +478,15 @@ static void prim_toPath(EvalState & state, Value * * args, Value & v) static void prim_storePath(EvalState & state, Value * * args, Value & v) { PathSet context; - Path path = canonPath(coerceToPath(state, args[0], context)); + Path path = canonPath(state.coerceToPath(*args[0], context)); if (!isInStore(path)) throw EvalError(format("path `%1%' is not in the Nix store") % path); Path path2 = toStorePath(path); if (!store->isValidPath(path2)) throw EvalError(format("store path `%1%' is not valid") % path2); context.insert(path2); - return makeStr(path, context); + mkString(v, path, context); } -#endif static void prim_pathExists(EvalState & state, Value * * args, Value & v) @@ -738,35 +736,20 @@ static void prim_listToAttrs(EvalState & state, Value * * args, Value & v) } -#if 0 /* Return the right-biased intersection of two attribute sets as1 and as2, i.e. a set that contains every attribute from as2 that is also a member of as1. */ static void prim_intersectAttrs(EvalState & state, Value * * args, Value & v) { - ATermMap as1, as2; - queryAllAttrs(evalExpr(state, args[0]), as1, true); - queryAllAttrs(evalExpr(state, args[1]), as2, true); - - ATermMap res; - foreach (ATermMap::const_iterator, i, as2) - if (as1[i->key]) res.set(i->key, i->value); - - return makeAttrs(res); -} - - -static void attrsInPattern(ATermMap & map, Pattern pat) -{ - ATerm name; - ATermList formals; - ATermBool ellipsis; - if (matchAttrsPat(pat, formals, ellipsis, name)) { - for (ATermIterator i(formals); i; ++i) { - ATerm def; - if (!matchFormal(*i, name, def)) abort(); - map.set(name, makeAttrRHS(makeBool(def != constNoDefaultValue), makeNoPos())); - } + state.forceAttrs(*args[0]); + state.forceAttrs(*args[1]); + + state.mkAttrs(v); + + foreach (Bindings::iterator, i, *args[1]->attrs) { + Bindings::iterator j = args[0]->attrs->find(i->first); + if (j != args[0]->attrs->end()) + mkCopy((*v.attrs)[i->first], i->second); } } @@ -786,17 +769,17 @@ static void attrsInPattern(ATermMap & map, Pattern pat) */ static void prim_functionArgs(EvalState & state, Value * * args, Value & v) { - Expr f = evalExpr(state, args[0]); - ATerm pat, body, pos; - if (!matchFunction(f, pat, body, pos)) - throw TypeError("`functionArgs' required a function"); - - ATermMap as; - attrsInPattern(as, pat); + state.forceValue(*args[0]); + if (args[0]->type != tLambda) + throw TypeError("`functionArgs' requires a function"); - return makeAttrs(as); + state.mkAttrs(v); + + if (!args[0]->lambda.fun->matchAttrs) return; + + foreach (Formals::Formals_::iterator, i, args[0]->lambda.fun->formals->formals) + mkBool((*v.attrs)[i->name], i->def); } -#endif /************************************************************* @@ -948,7 +931,6 @@ static void prim_unsafeDiscardStringContext(EvalState & state, Value * * args, V } -#if 0 /* Sometimes we want to pass a derivation path (i.e. pkg.drvPath) to a builder without causing the derivation to be built (for instance, in the derivation that builds NARs in nix-push, when doing @@ -958,7 +940,7 @@ static void prim_unsafeDiscardStringContext(EvalState & state, Value * * args, V static void prim_unsafeDiscardOutputDependency(EvalState & state, Value * * args, Value & v) { PathSet context; - string s = coerceToString(state, args[0], context); + string s = state.coerceToString(*args[0], context); PathSet context2; foreach (PathSet::iterator, i, context) { @@ -967,9 +949,8 @@ static void prim_unsafeDiscardOutputDependency(EvalState & state, Value * * args context2.insert(p); } - return makeStr(s, context2); + mkString(v, s, context2); } -#endif /************************************************************* @@ -1056,9 +1037,7 @@ void EvalState::createBaseEnv() // Paths addPrimOp("__toPath", 1, prim_toPath); -#if 0 addPrimOp("__storePath", 1, prim_storePath); -#endif addPrimOp("__pathExists", 1, prim_pathExists); addPrimOp("baseNameOf", 1, prim_baseNameOf); addPrimOp("dirOf", 1, prim_dirOf); @@ -1076,10 +1055,8 @@ void EvalState::createBaseEnv() addPrimOp("__isAttrs", 1, prim_isAttrs); addPrimOp("removeAttrs", 2, prim_removeAttrs); addPrimOp("__listToAttrs", 1, prim_listToAttrs); -#if 0 addPrimOp("__intersectAttrs", 2, prim_intersectAttrs); addPrimOp("__functionArgs", 1, prim_functionArgs); -#endif // Lists addPrimOp("__isList", 1, prim_isList); @@ -1100,9 +1077,7 @@ void EvalState::createBaseEnv() addPrimOp("__substring", 3, prim_substring); addPrimOp("__stringLength", 1, prim_stringLength); addPrimOp("__unsafeDiscardStringContext", 1, prim_unsafeDiscardStringContext); -#if 0 addPrimOp("__unsafeDiscardOutputDependency", 1, prim_unsafeDiscardOutputDependency); -#endif // Versions addPrimOp("__parseDrvName", 1, prim_parseDrvName); |