* Finished the ATerm-less parser.

This commit is contained in:
Eelco Dolstra 2010-04-12 23:33:23 +00:00
parent 0d272fca79
commit 10e8b1fd15
6 changed files with 68 additions and 102 deletions

View file

@ -56,7 +56,7 @@ void run(Strings args)
doTest(state, "let id = x: x; in [1 2] == [(id 1) (id 2)]"); doTest(state, "let id = x: x; in [1 2] == [(id 1) (id 2)]");
doTest(state, "let id = x: x; in [1 2] == [(id 1) (id 3)]"); doTest(state, "let id = x: x; in [1 2] == [(id 1) (id 3)]");
doTest(state, "[1 2] == [3 (let x = x; in x)]"); doTest(state, "[1 2] == [3 (let x = x; in x)]");
//doTest(state, "{ x = 1; y.z = 2; } == { y = { z = 2; }; x = 1; }"); doTest(state, "{ x = 1; y.z = 2; } == { y = { z = 2; }; x = 1; }");
doTest(state, "{ x = 1; y = 2; } == { x = 2; }"); doTest(state, "{ x = 1; y = 2; } == { x = 2; }");
doTest(state, "{ x = [ 1 2 ]; } == { x = [ 1 ] ++ [ 2 ]; }"); doTest(state, "{ x = [ 1 2 ]; } == { x = [ 1 ] ++ [ 2 ]; }");
doTest(state, "1 != 1"); doTest(state, "1 != 1");
@ -84,7 +84,7 @@ void run(Strings args)
doTest(state, "let as = { x = 1; }; bs = rec { inherit (as) x; y = x; }; in bs.y"); doTest(state, "let as = { x = 1; }; bs = rec { inherit (as) x; y = x; }; in bs.y");
doTest(state, "let as = rec { inherit (y) x; y = { x = 1; }; }; in as.x"); doTest(state, "let as = rec { inherit (y) x; y = { x = 1; }; }; in as.x");
doTest(state, "builtins.toXML 123"); doTest(state, "builtins.toXML 123");
//doTest(state, "builtins.toXML { a.b = \"x\" + \"y\"; c = [ 1 2 ] ++ [ 3 4 ]; }"); doTest(state, "builtins.toXML { a.b = \"x\" + \"y\"; c = [ 1 2 ] ++ [ 3 4 ]; }");
state.printStats(); state.printStats();
} }

View file

@ -54,6 +54,7 @@ std::ostream & operator << (std::ostream & str, Value & v)
str << "]"; str << "]";
break; break;
case tThunk: case tThunk:
case tCopy:
str << "<CODE>"; str << "<CODE>";
break; break;
case tLambda: case tLambda:
@ -160,6 +161,16 @@ LocalNoInlineNoReturn(void throwTypeError(const char * s, const string & s2))
throw TypeError(format(s) % s2); throw TypeError(format(s) % s2);
} }
LocalNoInlineNoReturn(void throwTypeError(const char * s, const Pos & pos, const string & s2))
{
throw TypeError(format(s) % pos % s2);
}
LocalNoInlineNoReturn(void throwTypeError(const char * s, const Pos & pos))
{
throw TypeError(format(s) % pos);
}
LocalNoInlineNoReturn(void throwAssertionError(const char * s, const Pos & pos)) LocalNoInlineNoReturn(void throwAssertionError(const char * s, const Pos & pos))
{ {
throw AssertionError(format(s) % pos); throw AssertionError(format(s) % pos);
@ -175,6 +186,11 @@ LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2))
e.addPrefix(format(s) % s2); e.addPrefix(format(s) % s2);
} }
LocalNoInline(void addErrorPrefix(Error & e, const char * s, const Pos & pos))
{
e.addPrefix(format(s) % pos);
}
LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2, const string & s3)) LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2, const string & s3))
{ {
e.addPrefix(format(s) % s2 % s3); e.addPrefix(format(s) % s2 % s3);
@ -424,6 +440,11 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
Value & v2 = (*v.attrs)[i->first]; Value & v2 = (*v.attrs)[i->first];
mkThunk(v2, env, i->second); mkThunk(v2, env, i->second);
} }
foreach (list<string>::iterator, i, inherited) {
Value & v2 = (*v.attrs)[*i];
mkCopy(v2, *lookupVar(&env, *i));
}
} }
} }
@ -555,7 +576,8 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
nrValues++; nrValues++;
if (j == arg.attrs->end()) { if (j == arg.attrs->end()) {
if (!i->def) throwTypeError("the argument named `%1%' required by the function is missing", i->name); if (!i->def) throwTypeError("function at %1% called without required argument `%2%'",
fun.lambda.fun->pos, i->name);
mkThunk(v, env2, i->def); mkThunk(v, env2, i->def);
} else { } else {
attrsUsed++; attrsUsed++;
@ -568,10 +590,15 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
TODO: show the names of the expected/unexpected TODO: show the names of the expected/unexpected
arguments. */ arguments. */
if (!fun.lambda.fun->formals->ellipsis && attrsUsed != arg.attrs->size()) if (!fun.lambda.fun->formals->ellipsis && attrsUsed != arg.attrs->size())
throwTypeError("function called with unexpected argument"); throwTypeError("function at %1% called with unexpected argument", fun.lambda.fun->pos);
} }
eval(env2, fun.lambda.fun->body, v); try {
eval(env2, fun.lambda.fun->body, v);
} catch (Error & e) {
addErrorPrefix(e, "while evaluating the function at %1%:\n", fun.lambda.fun->pos);
throw;
}
} }

View file

@ -55,7 +55,7 @@ void ExprAttrs::show(std::ostream & str)
if (recursive) str << "rec "; if (recursive) str << "rec ";
str << "{ "; str << "{ ";
foreach (list<string>::iterator, i, inherited) foreach (list<string>::iterator, i, inherited)
str << "inherited " << *i << "; "; str << "inherit " << *i << "; ";
foreach (Attrs::iterator, i, attrs) foreach (Attrs::iterator, i, attrs)
str << i->first << " = " << *i->second << "; "; str << i->first << " = " << *i->second << "; ";
str << "}"; str << "}";

View file

@ -44,99 +44,38 @@ struct ParseData
}; };
#if 0 static string showAttrPath(const vector<string> & attrPath)
static string showAttrPath(ATermList attrPath)
{ {
string s; string s;
for (ATermIterator i(attrPath); i; ++i) { foreach (vector<string>::const_iterator, i, attrPath) {
if (!s.empty()) s += '.'; if (!s.empty()) s += '.';
s += aterm2String(*i); s += *i;
} }
return s; return s;
} }
struct Tree static void addAttr(ExprAttrs * attrs, const vector<string> & attrPath, Expr * e, const Pos & pos)
{ {
Expr leaf; ATerm pos; bool recursive; unsigned int n = 0;
typedef std::map<ATerm, Tree> Children; foreach (vector<string>::const_iterator, i, attrPath) {
Children children; n++;
Tree() { leaf = 0; recursive = true; } if (attrs->attrs[*i]) {
}; ExprAttrs * attrs2 = dynamic_cast<ExprAttrs *>(attrs->attrs[*i]);
if (!attrs2)
throw ParseError(format("attribute `%1%' at %2% already defined at <SOMEWHERE>")
static ATermList buildAttrs(const Tree & t, ATermList & nonrec) % showAttrPath(attrPath) % pos);
{ attrs = attrs2;
ATermList res = ATempty; } else {
for (Tree::Children::const_reverse_iterator i = t.children.rbegin(); if (n == attrPath.size())
i != t.children.rend(); ++i) attrs->attrs[*i] = e;
if (!i->second.recursive) else {
nonrec = ATinsert(nonrec, makeBind(i->first, i->second.leaf, i->second.pos)); ExprAttrs * nested = new ExprAttrs;
else attrs->attrs[*i] = nested;
res = ATinsert(res, i->second.leaf attrs = nested;
? makeBind(i->first, i->second.leaf, i->second.pos)
: makeBind(i->first, makeAttrs(buildAttrs(i->second, nonrec)), makeNoPos()));
return res;
}
#endif
static void fixAttrs(ExprAttrs & attrs)
{
#if 0
Tree attrs;
/* This ATermMap is needed to ensure that the `leaf' fields in the
Tree nodes are not garbage collected. */
ATermMap gcRoots;
for (ATermIterator i(as); i; ++i) {
ATermList names, attrPath; Expr src, e; ATerm name, pos;
if (matchInherit(*i, src, names, pos)) {
bool fromScope = matchScope(src);
for (ATermIterator j(names); j; ++j) {
if (attrs.children.find(*j) != attrs.children.end())
throw ParseError(format("duplicate definition of attribute `%1%' at %2%")
% showAttrPath(ATmakeList1(*j)) % showPos(pos));
Tree & t(attrs.children[*j]);
Expr leaf = fromScope ? makeVar(*j) : makeSelect(src, *j);
gcRoots.set(leaf, leaf);
t.leaf = leaf;
t.pos = pos;
if (recursive && fromScope) t.recursive = false;
} }
} }
else if (matchBindAttrPath(*i, attrPath, e, pos)) {
Tree * t(&attrs);
for (ATermIterator j(attrPath); j; ) {
name = *j; ++j;
if (t->leaf) throw ParseError(format("attribute set containing `%1%' at %2% already defined at %3%")
% showAttrPath(attrPath) % showPos(pos) % showPos(t->pos));
t = &(t->children[name]);
}
if (t->leaf)
throw ParseError(format("duplicate definition of attribute `%1%' at %2% and %3%")
% showAttrPath(attrPath) % showPos(pos) % showPos(t->pos));
if (!t->children.empty())
throw ParseError(format("duplicate definition of attribute `%1%' at %2%")
% showAttrPath(attrPath) % showPos(pos));
t->leaf = e; t->pos = pos;
}
else abort(); /* can't happen */
} }
ATermList nonrec = ATempty;
ATermList rec = buildAttrs(attrs, nonrec);
return recursive ? makeRec(rec, nonrec) : makeAttrs(rec);
#endif
} }
@ -307,7 +246,7 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err
char * id; char * id;
char * path; char * path;
char * uri; char * uri;
std::list<std::string> * ids; std::vector<std::string> * ids;
std::vector<nix::Expr *> * string_parts; std::vector<nix::Expr *> * string_parts;
} }
@ -360,7 +299,7 @@ expr_function
| WITH expr ';' expr_function | WITH expr ';' expr_function
{ $$ = new ExprWith(CUR_POS, $2, $4); } { $$ = new ExprWith(CUR_POS, $2, $4); }
| LET binds IN expr_function | LET binds IN expr_function
{ $2->attrs["<let-body>"] = $4; $2->recursive = true; fixAttrs(*$2); $$ = new ExprSelect($2, "<let-body>"); } { $2->attrs["<let-body>"] = $4; $2->recursive = true; $$ = new ExprSelect($2, "<let-body>"); }
| expr_if | expr_if
; ;
@ -418,11 +357,11 @@ expr_simple
/* Let expressions `let {..., body = ...}' are just desugared /* Let expressions `let {..., body = ...}' are just desugared
into `(rec {..., body = ...}).body'. */ into `(rec {..., body = ...}).body'. */
| LET '{' binds '}' | LET '{' binds '}'
{ fixAttrs(*$3); $3->recursive = true; $$ = new ExprSelect($3, "body"); } { $3->recursive = true; $$ = new ExprSelect($3, "body"); }
| REC '{' binds '}' | REC '{' binds '}'
{ fixAttrs(*$3); $3->recursive = true; $$ = $3; } { $3->recursive = true; $$ = $3; }
| '{' binds '}' | '{' binds '}'
{ fixAttrs(*$2); $$ = $2; } { $$ = $2; }
| '[' expr_list ']' { $$ = $2; } | '[' expr_list ']' { $$ = $2; }
; ;
@ -439,16 +378,16 @@ ind_string_parts
; ;
binds binds
: binds ID '=' expr ';' { $$ = $1; $$->attrs[$2] = $4; } : binds attrpath '=' expr ';' { $$ = $1; addAttr($$, *$2, $4, CUR_POS); }
| binds INHERIT ids ';' | binds INHERIT ids ';'
{ $$ = $1; { $$ = $1;
foreach (list<string>::iterator, i, *$3) foreach (vector<string>::iterator, i, *$3)
$$->inherited.push_back(*i); $$->inherited.push_back(*i);
} }
| binds INHERIT '(' expr ')' ids ';' | binds INHERIT '(' expr ')' ids ';'
{ $$ = $1; { $$ = $1;
/* !!! Should ensure sharing of the expression in $4. */ /* !!! Should ensure sharing of the expression in $4. */
foreach (list<string>::iterator, i, *$6) foreach (vector<string>::iterator, i, *$6)
$$->attrs[*i] = new ExprSelect($4, *i); $$->attrs[*i] = new ExprSelect($4, *i);
} }
| { $$ = new ExprAttrs; } | { $$ = new ExprAttrs; }
@ -456,12 +395,12 @@ binds
ids ids
: ids ID { $$ = $1; $1->push_back($2); /* !!! dangerous */ } : ids ID { $$ = $1; $1->push_back($2); /* !!! dangerous */ }
| { $$ = new list<string>; } | { $$ = new vector<string>; }
; ;
attrpath attrpath
: attrpath '.' ID { $$ = ATinsert($1, $3); } : attrpath '.' ID { $$ = $1; $1->push_back($3); }
| ID { $$ = ATmakeList1($1); } | ID { $$ = new vector<string>; $$->push_back($1); }
; ;
expr_list expr_list

View file

@ -1023,8 +1023,8 @@ void EvalState::createBaseEnv()
/* Add a wrapper around the derivation primop that computes the /* Add a wrapper around the derivation primop that computes the
`drvPath' and `outPath' attributes lazily. */ `drvPath' and `outPath' attributes lazily. */
string s = "attrs: let res = derivationStrict attrs; in attrs // { drvPath = res.drvPath; outPath = res.outPath; type = \"derivation\"; }"; string s = "attrs: let res = derivationStrict attrs; in attrs // { drvPath = res.drvPath; outPath = res.outPath; type = \"derivation\"; }";
//mkThunk(v, baseEnv, parseExprFromString(s, "/")); mkThunk(v, baseEnv, parseExprFromString(s, "/"));
//addConstant("derivation", v); addConstant("derivation", v);
// Miscellaneous // Miscellaneous
addPrimOp("import", 1, prim_import); addPrimOp("import", 1, prim_import);

View file

@ -177,7 +177,7 @@ static void initAndRun(int argc, char * * argv)
if (lt != "") setLogType(lt); if (lt != "") setLogType(lt);
/* ATerm stuff. !!! find a better place to put this */ /* ATerm stuff. !!! find a better place to put this */
//initDerivationsHelpers(); initDerivationsHelpers();
/* Put the arguments in a vector. */ /* Put the arguments in a vector. */
Strings args, remaining; Strings args, remaining;
@ -335,7 +335,7 @@ int main(int argc, char * * argv)
/* ATerm setup. */ /* ATerm setup. */
ATerm bottomOfStack; ATerm bottomOfStack;
//ATinit(argc, argv, &bottomOfStack); ATinit(argc, argv, &bottomOfStack);
/* Turn on buffering for cerr. */ /* Turn on buffering for cerr. */
#if HAVE_PUBSETBUF #if HAVE_PUBSETBUF