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Merge pull request #5341 from andir/libexpr-formals

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libexpr: remove matchAttrs boolean from ExprLambda
This commit is contained in:
Eelco Dolstra 2021-10-07 11:58:56 +02:00 committed by GitHub
commit c9ee634f75
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8 changed files with 18 additions and 18 deletions
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6
src/libexpr/eval.cc
View file

@ -1316,13 +1316,13 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v, const Pos & po
auto size =
(lambda.arg.empty() ? 0 : 1) +
(lambda.matchAttrs ? lambda.formals->formals.size() : 0);
(lambda.hasFormals() ? lambda.formals->formals.size() : 0);
Env & env2(allocEnv(size));
env2.up = fun.lambda.env;
size_t displ = 0;
if (!lambda.matchAttrs)
if (!lambda.hasFormals())
env2.values[displ++] = &arg;
else {
@ -1402,7 +1402,7 @@ void EvalState::autoCallFunction(Bindings & args, Value & fun, Value & res)
}
}
if (!fun.isLambda() || !fun.lambda.fun->matchAttrs) {
if (!fun.isLambda() || !fun.lambda.fun->hasFormals()) {
res = fun;
return;
}

2
src/libexpr/flake/flake.cc
View file

@ -231,7 +231,7 @@ static Flake getFlake(
if (auto outputs = vInfo.attrs->get(sOutputs)) {
expectType(state, nFunction, *outputs->value, *outputs->pos);
if (outputs->value->isLambda() && outputs->value->lambda.fun->matchAttrs) {
if (outputs->value->isLambda() && outputs->value->lambda.fun->hasFormals()) {
for (auto & formal : outputs->value->lambda.fun->formals->formals) {
if (formal.name != state.sSelf)
flake.inputs.emplace(formal.name, FlakeInput {

4
src/libexpr/nixexpr.cc
View file

@ -124,7 +124,7 @@ void ExprList::show(std::ostream & str) const
void ExprLambda::show(std::ostream & str) const
{
str << "(";
if (matchAttrs) {
if (hasFormals()) {
str << "{ ";
bool first = true;
for (auto & i : formals->formals) {
@ -348,7 +348,7 @@ void ExprLambda::bindVars(const StaticEnv & env)
if (!arg.empty()) newEnv.vars[arg] = displ++;
if (matchAttrs) {
if (hasFormals()) {
for (auto & i : formals->formals)
newEnv.vars[i.name] = displ++;

6
src/libexpr/nixexpr.hh
View file

@ -233,11 +233,10 @@ struct ExprLambda : Expr
Pos pos;
Symbol name;
Symbol arg;
bool matchAttrs;
Formals * formals;
Expr * body;
ExprLambda(const Pos & pos, const Symbol & arg, bool matchAttrs, Formals * formals, Expr * body)
: pos(pos), arg(arg), matchAttrs(matchAttrs), formals(formals), body(body)
ExprLambda(const Pos & pos, const Symbol & arg, Formals * formals, Expr * body)
: pos(pos), arg(arg), formals(formals), body(body)
{
if (!arg.empty() && formals && formals->argNames.find(arg) != formals->argNames.end())
throw ParseError({
@ -247,6 +246,7 @@ struct ExprLambda : Expr
};
void setName(Symbol & name);
string showNamePos() const;
inline bool hasFormals() const { return formals != nullptr; }
COMMON_METHODS
};

8
src/libexpr/parser.y
View file

@ -324,13 +324,13 @@ expr: expr_function;
expr_function
: ID ':' expr_function
{ $$ = new ExprLambda(CUR_POS, data->symbols.create($1), false, 0, $3); }
{ $$ = new ExprLambda(CUR_POS, data->symbols.create($1), 0, $3); }
| '{' formals '}' ':' expr_function
{ $$ = new ExprLambda(CUR_POS, data->symbols.create(""), true, $2, $5); }
{ $$ = new ExprLambda(CUR_POS, data->symbols.create(""), $2, $5); }
| '{' formals '}' '@' ID ':' expr_function
{ $$ = new ExprLambda(CUR_POS, data->symbols.create($5), true, $2, $7); }
{ $$ = new ExprLambda(CUR_POS, data->symbols.create($5), $2, $7); }
| ID '@' '{' formals '}' ':' expr_function
{ $$ = new ExprLambda(CUR_POS, data->symbols.create($1), true, $4, $7); }
{ $$ = new ExprLambda(CUR_POS, data->symbols.create($1), $4, $7); }
| ASSERT expr ';' expr_function
{ $$ = new ExprAssert(CUR_POS, $2, $4); }
| WITH expr ';' expr_function

2
src/libexpr/primops.cc
View file

@ -2381,7 +2381,7 @@ static void prim_functionArgs(EvalState & state, const Pos & pos, Value * * args
.errPos = pos
});
if (!args[0]->lambda.fun->matchAttrs) {
if (!args[0]->lambda.fun->hasFormals()) {
state.mkAttrs(v, 0);
return;
}

2
src/libexpr/value-to-xml.cc
View file

@ -135,7 +135,7 @@ static void printValueAsXML(EvalState & state, bool strict, bool location,
if (location) posToXML(xmlAttrs, v.lambda.fun->pos);
XMLOpenElement _(doc, "function", xmlAttrs);
if (v.lambda.fun->matchAttrs) {
if (v.lambda.fun->hasFormals()) {
XMLAttrs attrs;
if (!v.lambda.fun->arg.empty()) attrs["name"] = v.lambda.fun->arg;
if (v.lambda.fun->formals->ellipsis) attrs["ellipsis"] = "1";

6
src/nix/flake.cc
View file

@ -346,10 +346,10 @@ struct CmdFlakeCheck : FlakeCommand
auto checkOverlay = [&](const std::string & attrPath, Value & v, const Pos & pos) {
try {
state->forceValue(v, pos);
if (!v.isLambda() || v.lambda.fun->matchAttrs || std::string(v.lambda.fun->arg) != "final")
if (!v.isLambda() || v.lambda.fun->hasFormals() || std::string(v.lambda.fun->arg) != "final")
throw Error("overlay does not take an argument named 'final'");
auto body = dynamic_cast<ExprLambda *>(v.lambda.fun->body);
if (!body || body->matchAttrs || std::string(body->arg) != "prev")
if (!body || body->hasFormals() || std::string(body->arg) != "prev")
throw Error("overlay does not take an argument named 'prev'");
// FIXME: if we have a 'nixpkgs' input, use it to
// evaluate the overlay.
@ -363,7 +363,7 @@ struct CmdFlakeCheck : FlakeCommand
try {
state->forceValue(v, pos);
if (v.isLambda()) {
if (!v.lambda.fun->matchAttrs || !v.lambda.fun->formals->ellipsis)
if (!v.lambda.fun->hasFormals() || !v.lambda.fun->formals->ellipsis)
throw Error("module must match an open attribute set ('{ config, ... }')");
} else if (v.type() == nAttrs) {
for (auto & attr : *v.attrs)