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* More primops.

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This commit is contained in:
Eelco Dolstra 2010-03-30 15:18:20 +00:00
parent c3aa615a5f
commit c9170be2bd
4 changed files with 92 additions and 184 deletions
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160
src/libexpr/eval.cc
View file

@ -405,21 +405,35 @@ void EvalState::eval(Env & env, Expr e, Value & v)
} }
if (matchConcatStrings(e, es)) { if (matchConcatStrings(e, es)) {
unsigned int n = ATgetLength(es), j = 0; PathSet context;
Value vs[n]; std::ostringstream s;
unsigned int len = 0;
for (ATermIterator i(es); i; ++i, ++j) { bool first = true, isPath;
eval(env, *i, vs[j]);
if (vs[j].type != tString) throw TypeError("string expected"); for (ATermIterator i(es); i; ++i) {
len += strlen(vs[j].string.s); eval(env, *i, v);
/* If the first element is a path, then the result will
also be a path, we don't copy anything (yet - that's
done later, since paths are copied when they are used
in a derivation), and none of the strings are allowed
to have contexts. */
if (first) {
isPath = v.type == tPath;
first = false;
}
s << coerceToString(v, context, false, !isPath);
} }
char * s = new char[len + 1], * t = s;
for (unsigned int i = 0; i < j; ++i) { if (isPath && !context.empty())
strcpy(t, vs[i].string.s); throw EvalError(format("a string that refers to a store path cannot be appended to a path, in `%1%'")
t += strlen(vs[i].string.s); % s.str());
}
*t = 0; if (isPath)
mkString(v, s); mkPath(v, strdup(s.str().c_str()));
else
mkString(v, strdup(s.str().c_str())); // !!! context
return; return;
} }
@ -969,116 +983,6 @@ ATermList flattenList(EvalState & state, Expr e)
} }
string coerceToString(EvalState & state, Expr e, PathSet & context,
bool coerceMore, bool copyToStore)
{
e = evalExpr(state, e);
string s;
if (matchStr(e, s, context)) return s;
ATerm s2;
if (matchPath(e, s2)) {
Path path(canonPath(aterm2String(s2)));
if (!copyToStore) return path;
if (isDerivation(path))
throw EvalError(format("file names are not allowed to end in `%1%'")
% drvExtension);
Path dstPath;
if (state.srcToStore[path] != "")
dstPath = state.srcToStore[path];
else {
dstPath = readOnlyMode
? computeStorePathForPath(path).first
: store->addToStore(path);
state.srcToStore[path] = dstPath;
printMsg(lvlChatty, format("copied source `%1%' -> `%2%'")
% path % dstPath);
}
context.insert(dstPath);
return dstPath;
}
ATermList es;
if (matchAttrs(e, es)) {
Expr e2 = queryAttr(e, "outPath");
if (!e2) throwTypeError("cannot coerce an attribute set (except a derivation) to a string");
return coerceToString(state, e2, context, coerceMore, copyToStore);
}
if (coerceMore) {
/* Note that `false' is represented as an empty string for
shell scripting convenience, just like `null'. */
if (e == eTrue) return "1";
if (e == eFalse) return "";
int n;
if (matchInt(e, n)) return int2String(n);
if (matchNull(e)) return "";
if (matchList(e, es)) {
string result;
es = flattenList(state, e);
bool first = true;
for (ATermIterator i(es); i; ++i) {
if (!first) result += " "; else first = false;
result += coerceToString(state, *i,
context, coerceMore, copyToStore);
}
return result;
}
}
throwTypeError("cannot coerce %1% to a string", showType(e));
}
/* Common implementation of `+', ConcatStrings and `~'. */
static ATerm concatStrings(EvalState & state, ATermVector & args,
string separator = "")
{
if (args.empty()) return makeStr("", PathSet());
PathSet context;
std::ostringstream s;
/* If the first element is a path, then the result will also be a
path, we don't copy anything (yet - that's done later, since
paths are copied when they are used in a derivation), and none
of the strings are allowed to have contexts. */
ATerm dummy;
args.front() = evalExpr(state, args.front());
bool isPath = matchPath(args.front(), dummy);
for (ATermVector::const_iterator i = args.begin(); i != args.end(); ++i) {
if (i != args.begin()) s << separator;
s << coerceToString(state, *i, context, false, !isPath);
}
if (isPath && !context.empty())
throw EvalError(format("a string that refers to a store path cannot be appended to a path, in `%1%'")
% s.str());
return isPath
? makePath(toATerm(s.str()))
: makeStr(s.str(), context);
}
Path coerceToPath(EvalState & state, Expr e, PathSet & context)
{
string path = coerceToString(state, e, context, false, false);
if (path == "" || path[0] != '/')
throw EvalError(format("string `%1%' doesn't represent an absolute path") % path);
return path;
}
Expr autoCallFunction(Expr e, const ATermMap & args) Expr autoCallFunction(Expr e, const ATermMap & args)
{ {
Pattern pat; Pattern pat;
@ -1515,16 +1419,16 @@ Expr strictEvalExpr(EvalState & state, Expr e)
#endif #endif
void printEvalStats(EvalState & state) void EvalState::printStats()
{ {
char x; char x;
bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0"; bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0";
printMsg(showStats ? lvlInfo : lvlDebug, printMsg(showStats ? lvlInfo : lvlDebug,
format("evaluated %1% expressions, used %2% bytes of stack space, allocated %3% values, allocated %4% environments") format("evaluated %1% expressions, used %2% bytes of stack space, allocated %3% values, allocated %4% environments")
% state.nrEvaluated % nrEvaluated
% (&x - deepestStack) % (&x - deepestStack)
% state.nrValues % nrValues
% state.nrEnvs); % nrEnvs);
if (showStats) if (showStats)
printATermMapStats(); printATermMapStats();
} }

10
src/libexpr/eval.hh
View file

@ -132,7 +132,7 @@ struct EvalState;
std::ostream & operator << (std::ostream & str, Value & v); std::ostream & operator << (std::ostream & str, Value & v);
struct EvalState class EvalState
{ {
DrvRoots drvRoots; DrvRoots drvRoots;
DrvHashes drvHashes; /* normalised derivation hashes */ DrvHashes drvHashes; /* normalised derivation hashes */
@ -144,6 +144,8 @@ struct EvalState
bool allowUnsafeEquality; bool allowUnsafeEquality;
public:
EvalState(); EvalState();
/* Evaluate an expression read from the given file to normal /* Evaluate an expression read from the given file to normal
@ -214,6 +216,9 @@ public:
Env & allocEnv(); Env & allocEnv();
void mkList(Value & v, unsigned int length); void mkList(Value & v, unsigned int length);
/* Print statistics. */
void printStats();
}; };
@ -244,9 +249,6 @@ ATermList flattenList(EvalState & state, Expr e);
Expr autoCallFunction(Expr e, const ATermMap & args); Expr autoCallFunction(Expr e, const ATermMap & args);
#endif #endif
/* Print statistics. */
void printEvalStats(EvalState & state);
} }

104
src/libexpr/primops.cc
View file

@ -47,14 +47,14 @@ static void prim_import(EvalState & state, Value * * args, Value & v)
#if 0 #if 0
/* Determine whether the argument is the null value. */ /* Determine whether the argument is the null value. */
static Expr prim_isNull(EvalState & state, const ATermVector & args) static void prim_isNull(EvalState & state, Value * * args, Value & v)
{ {
return makeBool(matchNull(evalExpr(state, args[0]))); return makeBool(matchNull(evalExpr(state, args[0])));
} }
/* Determine whether the argument is a function. */ /* Determine whether the argument is a function. */
static Expr prim_isFunction(EvalState & state, const ATermVector & args) static void prim_isFunction(EvalState & state, Value * * args, Value & v)
{ {
Expr e = evalExpr(state, args[0]); Expr e = evalExpr(state, args[0]);
Pattern pat; Pattern pat;
@ -63,14 +63,14 @@ static Expr prim_isFunction(EvalState & state, const ATermVector & args)
} }
/* Determine whether the argument is an Int. */ /* Determine whether the argument is an Int. */
static Expr prim_isInt(EvalState & state, const ATermVector & args) static void prim_isInt(EvalState & state, Value * * args, Value & v)
{ {
int i; int i;
return makeBool(matchInt(evalExpr(state, args[0]), i)); return makeBool(matchInt(evalExpr(state, args[0]), i));
} }
/* Determine whether the argument is an String. */ /* Determine whether the argument is an String. */
static Expr prim_isString(EvalState & state, const ATermVector & args) static void prim_isString(EvalState & state, Value * * args, Value & v)
{ {
string s; string s;
PathSet l; PathSet l;
@ -78,13 +78,13 @@ static Expr prim_isString(EvalState & state, const ATermVector & args)
} }
/* Determine whether the argument is an Bool. */ /* Determine whether the argument is an Bool. */
static Expr prim_isBool(EvalState & state, const ATermVector & args) static void prim_isBool(EvalState & state, Value * * args, Value & v)
{ {
ATermBool b; ATermBool b;
return makeBool(matchBool(evalExpr(state, args[0]), b)); return makeBool(matchBool(evalExpr(state, args[0]), b));
} }
static Expr prim_genericClosure(EvalState & state, const ATermVector & args) static void prim_genericClosure(EvalState & state, Value * * args, Value & v)
{ {
startNest(nest, lvlDebug, "finding dependencies"); startNest(nest, lvlDebug, "finding dependencies");
@ -132,7 +132,7 @@ static Expr prim_genericClosure(EvalState & state, const ATermVector & args)
} }
static Expr prim_abort(EvalState & state, const ATermVector & args) static void prim_abort(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
throw Abort(format("evaluation aborted with the following error message: `%1%'") % throw Abort(format("evaluation aborted with the following error message: `%1%'") %
@ -140,7 +140,7 @@ static Expr prim_abort(EvalState & state, const ATermVector & args)
} }
static Expr prim_throw(EvalState & state, const ATermVector & args) static void prim_throw(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
throw ThrownError(format("user-thrown exception: %1%") % throw ThrownError(format("user-thrown exception: %1%") %
@ -148,7 +148,7 @@ static Expr prim_throw(EvalState & state, const ATermVector & args)
} }
static Expr prim_addErrorContext(EvalState & state, const ATermVector & args) static void prim_addErrorContext(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
try { try {
@ -162,7 +162,7 @@ static Expr prim_addErrorContext(EvalState & state, const ATermVector & args)
/* Try evaluating the argument. Success => {success=true; value=something;}, /* Try evaluating the argument. Success => {success=true; value=something;},
* else => {success=false; value=false;} */ * else => {success=false; value=false;} */
static Expr prim_tryEval(EvalState & state, const ATermVector & args) static void prim_tryEval(EvalState & state, Value * * args, Value & v)
{ {
ATermMap res = ATermMap(); ATermMap res = ATermMap();
try { try {
@ -179,7 +179,7 @@ static Expr prim_tryEval(EvalState & state, const ATermVector & args)
/* Return an environment variable. Use with care. */ /* Return an environment variable. Use with care. */
static Expr prim_getEnv(EvalState & state, const ATermVector & args) static void prim_getEnv(EvalState & state, Value * * args, Value & v)
{ {
string name = evalStringNoCtx(state, args[0]); string name = evalStringNoCtx(state, args[0]);
return makeStr(getEnv(name)); return makeStr(getEnv(name));
@ -190,7 +190,7 @@ static Expr prim_getEnv(EvalState & state, const ATermVector & args)
on standard error. Then return the second expression. Useful for on standard error. Then return the second expression. Useful for
debugging. debugging.
*/ */
static Expr prim_trace(EvalState & state, const ATermVector & args) static void prim_trace(EvalState & state, Value * * args, Value & v)
{ {
Expr e = evalExpr(state, args[0]); Expr e = evalExpr(state, args[0]);
string s; string s;
@ -272,7 +272,7 @@ static Hash hashDerivationModulo(EvalState & state, Derivation drv)
derivation; `drvPath' containing the path of the Nix expression; derivation; `drvPath' containing the path of the Nix expression;
and `type' set to `derivation' to indicate that this is a and `type' set to `derivation' to indicate that this is a
derivation. */ derivation. */
static Expr prim_derivationStrict(EvalState & state, const ATermVector & args) static void prim_derivationStrict(EvalState & state, Value * * args, Value & v)
{ {
startNest(nest, lvlVomit, "evaluating derivation"); startNest(nest, lvlVomit, "evaluating derivation");
@ -470,7 +470,7 @@ static Expr prim_derivationStrict(EvalState & state, const ATermVector & args)
} }
static Expr prim_derivationLazy(EvalState & state, const ATermVector & args) static void prim_derivationLazy(EvalState & state, Value * * args, Value & v)
{ {
Expr eAttrs = evalExpr(state, args[0]); Expr eAttrs = evalExpr(state, args[0]);
ATermMap attrs; ATermMap attrs;
@ -496,7 +496,7 @@ static Expr prim_derivationLazy(EvalState & state, const ATermVector & args)
/* Convert the argument to a path. !!! obsolete? */ /* Convert the argument to a path. !!! obsolete? */
static Expr prim_toPath(EvalState & state, const ATermVector & args) static void prim_toPath(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
string path = coerceToPath(state, args[0], context); string path = coerceToPath(state, args[0], context);
@ -512,7 +512,7 @@ static Expr prim_toPath(EvalState & state, const ATermVector & args)
/nix/store/newhash-oldhash-oldname. In the past, `toPath' had /nix/store/newhash-oldhash-oldname. In the past, `toPath' had
special case behaviour for store paths, but that created weird special case behaviour for store paths, but that created weird
corner cases. */ corner cases. */
static Expr prim_storePath(EvalState & state, const ATermVector & args) static void prim_storePath(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
Path path = canonPath(coerceToPath(state, args[0], context)); Path path = canonPath(coerceToPath(state, args[0], context));
@ -526,7 +526,7 @@ static Expr prim_storePath(EvalState & state, const ATermVector & args)
} }
static Expr prim_pathExists(EvalState & state, const ATermVector & args) static void prim_pathExists(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
Path path = coerceToPath(state, args[0], context); Path path = coerceToPath(state, args[0], context);
@ -538,7 +538,7 @@ static Expr prim_pathExists(EvalState & state, const ATermVector & args)
/* Return the base name of the given string, i.e., everything /* Return the base name of the given string, i.e., everything
following the last slash. */ following the last slash. */
static Expr prim_baseNameOf(EvalState & state, const ATermVector & args) static void prim_baseNameOf(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
return makeStr(baseNameOf(coerceToString(state, args[0], context)), context); return makeStr(baseNameOf(coerceToString(state, args[0], context)), context);
@ -548,7 +548,7 @@ static Expr prim_baseNameOf(EvalState & state, const ATermVector & args)
/* Return the directory of the given path, i.e., everything before the /* Return the directory of the given path, i.e., everything before the
last slash. Return either a path or a string depending on the type last slash. Return either a path or a string depending on the type
of the argument. */ of the argument. */
static Expr prim_dirOf(EvalState & state, const ATermVector & args) static void prim_dirOf(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
Expr e = evalExpr(state, args[0]); ATerm dummy; Expr e = evalExpr(state, args[0]); ATerm dummy;
@ -559,7 +559,7 @@ static Expr prim_dirOf(EvalState & state, const ATermVector & args)
/* Return the contents of a file as a string. */ /* Return the contents of a file as a string. */
static Expr prim_readFile(EvalState & state, const ATermVector & args) static void prim_readFile(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
Path path = coerceToPath(state, args[0], context); Path path = coerceToPath(state, args[0], context);
@ -577,7 +577,7 @@ static Expr prim_readFile(EvalState & state, const ATermVector & args)
/* Convert the argument (which can be any Nix expression) to an XML /* Convert the argument (which can be any Nix expression) to an XML
representation returned in a string. Not all Nix expressions can representation returned in a string. Not all Nix expressions can
be sensibly or completely represented (e.g., functions). */ be sensibly or completely represented (e.g., functions). */
static Expr prim_toXML(EvalState & state, const ATermVector & args) static void prim_toXML(EvalState & state, Value * * args, Value & v)
{ {
std::ostringstream out; std::ostringstream out;
PathSet context; PathSet context;
@ -588,7 +588,7 @@ static Expr prim_toXML(EvalState & state, const ATermVector & args)
/* Store a string in the Nix store as a source file that can be used /* Store a string in the Nix store as a source file that can be used
as an input by derivations. */ as an input by derivations. */
static Expr prim_toFile(EvalState & state, const ATermVector & args) static void prim_toFile(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
string name = evalStringNoCtx(state, args[0]); string name = evalStringNoCtx(state, args[0]);
@ -647,7 +647,7 @@ struct FilterFromExpr : PathFilter
}; };
static Expr prim_filterSource(EvalState & state, const ATermVector & args) static void prim_filterSource(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
Path path = coerceToPath(state, args[1], context); Path path = coerceToPath(state, args[1], context);
@ -671,7 +671,7 @@ static Expr prim_filterSource(EvalState & state, const ATermVector & args)
/* Return the names of the attributes in an attribute set as a sorted /* Return the names of the attributes in an attribute set as a sorted
list of strings. */ list of strings. */
static Expr prim_attrNames(EvalState & state, const ATermVector & args) static void prim_attrNames(EvalState & state, Value * * args, Value & v)
{ {
ATermMap attrs; ATermMap attrs;
queryAllAttrs(evalExpr(state, args[0]), attrs); queryAllAttrs(evalExpr(state, args[0]), attrs);
@ -690,7 +690,7 @@ static Expr prim_attrNames(EvalState & state, const ATermVector & args)
/* Dynamic version of the `.' operator. */ /* Dynamic version of the `.' operator. */
static Expr prim_getAttr(EvalState & state, const ATermVector & args) static void prim_getAttr(EvalState & state, Value * * args, Value & v)
{ {
string attr = evalStringNoCtx(state, args[0]); string attr = evalStringNoCtx(state, args[0]);
return evalExpr(state, makeSelect(args[1], toATerm(attr))); return evalExpr(state, makeSelect(args[1], toATerm(attr)));
@ -698,7 +698,7 @@ static Expr prim_getAttr(EvalState & state, const ATermVector & args)
/* Dynamic version of the `?' operator. */ /* Dynamic version of the `?' operator. */
static Expr prim_hasAttr(EvalState & state, const ATermVector & args) static void prim_hasAttr(EvalState & state, Value * * args, Value & v)
{ {
string attr = evalStringNoCtx(state, args[0]); string attr = evalStringNoCtx(state, args[0]);
return evalExpr(state, makeOpHasAttr(args[1], toATerm(attr))); return evalExpr(state, makeOpHasAttr(args[1], toATerm(attr)));
@ -709,7 +709,7 @@ static Expr prim_hasAttr(EvalState & state, const ATermVector & args)
pairs. To be precise, a list [{name = "name1"; value = value1;} pairs. To be precise, a list [{name = "name1"; value = value1;}
... {name = "nameN"; value = valueN;}] is transformed to {name1 = ... {name = "nameN"; value = valueN;}] is transformed to {name1 =
value1; ... nameN = valueN;}. */ value1; ... nameN = valueN;}. */
static Expr prim_listToAttrs(EvalState & state, const ATermVector & args) static void prim_listToAttrs(EvalState & state, Value * * args, Value & v)
{ {
try { try {
ATermMap res = ATermMap(); ATermMap res = ATermMap();
@ -739,7 +739,7 @@ static Expr prim_listToAttrs(EvalState & state, const ATermVector & args)
} }
static Expr prim_removeAttrs(EvalState & state, const ATermVector & args) static void prim_removeAttrs(EvalState & state, Value * * args, Value & v)
{ {
ATermMap attrs; ATermMap attrs;
queryAllAttrs(evalExpr(state, args[0]), attrs, true); queryAllAttrs(evalExpr(state, args[0]), attrs, true);
@ -755,7 +755,7 @@ static Expr prim_removeAttrs(EvalState & state, const ATermVector & args)
/* Determine whether the argument is an attribute set. */ /* Determine whether the argument is an attribute set. */
static Expr prim_isAttrs(EvalState & state, const ATermVector & args) static void prim_isAttrs(EvalState & state, Value * * args, Value & v)
{ {
ATermList list; ATermList list;
return makeBool(matchAttrs(evalExpr(state, args[0]), list)); return makeBool(matchAttrs(evalExpr(state, args[0]), list));
@ -765,7 +765,7 @@ static Expr prim_isAttrs(EvalState & state, const ATermVector & args)
/* Return the right-biased intersection of two attribute sets as1 and /* 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 as2, i.e. a set that contains every attribute from as2 that is also
a member of as1. */ a member of as1. */
static Expr prim_intersectAttrs(EvalState & state, const ATermVector & args) static void prim_intersectAttrs(EvalState & state, Value * * args, Value & v)
{ {
ATermMap as1, as2; ATermMap as1, as2;
queryAllAttrs(evalExpr(state, args[0]), as1, true); queryAllAttrs(evalExpr(state, args[0]), as1, true);
@ -807,7 +807,7 @@ static void attrsInPattern(ATermMap & map, Pattern pat)
functionArgs (x: ...) functionArgs (x: ...)
=> { } => { }
*/ */
static Expr prim_functionArgs(EvalState & state, const ATermVector & args) static void prim_functionArgs(EvalState & state, Value * * args, Value & v)
{ {
Expr f = evalExpr(state, args[0]); Expr f = evalExpr(state, args[0]);
ATerm pat, body, pos; ATerm pat, body, pos;
@ -827,7 +827,7 @@ static Expr prim_functionArgs(EvalState & state, const ATermVector & args)
/* Determine whether the argument is a list. */ /* Determine whether the argument is a list. */
static Expr prim_isList(EvalState & state, const ATermVector & args) static void prim_isList(EvalState & state, Value * * args, Value & v)
{ {
ATermList list; ATermList list;
return makeBool(matchList(evalExpr(state, args[0]), list)); return makeBool(matchList(evalExpr(state, args[0]), list));
@ -877,7 +877,7 @@ static void prim_map(EvalState & state, Value * * args, Value & v)
#if 0 #if 0
/* Return the length of a list. This is an O(1) time operation. */ /* Return the length of a list. This is an O(1) time operation. */
static Expr prim_length(EvalState & state, const ATermVector & args) static void prim_length(EvalState & state, Value * * args, Value & v)
{ {
ATermList list = evalList(state, args[0]); ATermList list = evalList(state, args[0]);
return makeInt(ATgetLength(list)); return makeInt(ATgetLength(list));
@ -897,7 +897,7 @@ static void prim_add(EvalState & state, Value * * args, Value & v)
#if 0 #if 0
static Expr prim_sub(EvalState & state, const ATermVector & args) static void prim_sub(EvalState & state, Value * * args, Value & v)
{ {
int i1 = evalInt(state, args[0]); int i1 = evalInt(state, args[0]);
int i2 = evalInt(state, args[1]); int i2 = evalInt(state, args[1]);
@ -905,7 +905,7 @@ static Expr prim_sub(EvalState & state, const ATermVector & args)
} }
static Expr prim_mul(EvalState & state, const ATermVector & args) static void prim_mul(EvalState & state, Value * * args, Value & v)
{ {
int i1 = evalInt(state, args[0]); int i1 = evalInt(state, args[0]);
int i2 = evalInt(state, args[1]); int i2 = evalInt(state, args[1]);
@ -913,20 +913,19 @@ static Expr prim_mul(EvalState & state, const ATermVector & args)
} }
static Expr prim_div(EvalState & state, const ATermVector & args) static void prim_div(EvalState & state, Value * * args, Value & v)
{ {
int i1 = evalInt(state, args[0]); int i1 = evalInt(state, args[0]);
int i2 = evalInt(state, args[1]); int i2 = evalInt(state, args[1]);
if (i2 == 0) throw EvalError("division by zero"); if (i2 == 0) throw EvalError("division by zero");
return makeInt(i1 / i2); return makeInt(i1 / i2);
} }
#endif
static Expr prim_lessThan(EvalState & state, const ATermVector & args) static void prim_lessThan(EvalState & state, Value * * args, Value & v)
{ {
int i1 = evalInt(state, args[0]); mkBool(v, state.forceInt(*args[0]) < state.forceInt(*args[1]));
int i2 = evalInt(state, args[1]);
return makeBool(i1 < i2);
} }
@ -938,19 +937,20 @@ static Expr prim_lessThan(EvalState & state, const ATermVector & args)
/* Convert the argument to a string. Paths are *not* copied to the /* Convert the argument to a string. Paths are *not* copied to the
store, so `toString /foo/bar' yields `"/foo/bar"', not store, so `toString /foo/bar' yields `"/foo/bar"', not
`"/nix/store/whatever..."'. */ `"/nix/store/whatever..."'. */
static Expr prim_toString(EvalState & state, const ATermVector & args) static void prim_toString(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
string s = coerceToString(state, args[0], context, true, false); string s = state.coerceToString(*args[0], context, true, false);
return makeStr(s, context); mkString(v, strdup(s.c_str())); // !!! context
} }
#if 0
/* `substring start len str' returns the substring of `str' starting /* `substring start len str' returns the substring of `str' starting
at character position `min(start, stringLength str)' inclusive and at character position `min(start, stringLength str)' inclusive and
ending at `min(start + len, stringLength str)'. `start' must be ending at `min(start + len, stringLength str)'. `start' must be
non-negative. */ non-negative. */
static Expr prim_substring(EvalState & state, const ATermVector & args) static void prim_substring(EvalState & state, Value * * args, Value & v)
{ {
int start = evalInt(state, args[0]); int start = evalInt(state, args[0]);
int len = evalInt(state, args[1]); int len = evalInt(state, args[1]);
@ -963,7 +963,7 @@ static Expr prim_substring(EvalState & state, const ATermVector & args)
} }
static Expr prim_stringLength(EvalState & state, const ATermVector & args) static void prim_stringLength(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
string s = coerceToString(state, args[0], context); string s = coerceToString(state, args[0], context);
@ -971,7 +971,7 @@ static Expr prim_stringLength(EvalState & state, const ATermVector & args)
} }
static Expr prim_unsafeDiscardStringContext(EvalState & state, const ATermVector & args) static void prim_unsafeDiscardStringContext(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
string s = coerceToString(state, args[0], context); string s = coerceToString(state, args[0], context);
@ -985,7 +985,7 @@ static Expr prim_unsafeDiscardStringContext(EvalState & state, const ATermVector
source-only deployment). This primop marks the string context so source-only deployment). This primop marks the string context so
that builtins.derivation adds the path to drv.inputSrcs rather than that builtins.derivation adds the path to drv.inputSrcs rather than
drv.inputDrvs. */ drv.inputDrvs. */
static Expr prim_unsafeDiscardOutputDependency(EvalState & state, const ATermVector & args) static void prim_unsafeDiscardOutputDependency(EvalState & state, Value * * args, Value & v)
{ {
PathSet context; PathSet context;
string s = coerceToString(state, args[0], context); string s = coerceToString(state, args[0], context);
@ -1004,14 +1004,14 @@ static Expr prim_unsafeDiscardOutputDependency(EvalState & state, const ATermVec
/* Expression serialization/deserialization */ /* Expression serialization/deserialization */
static Expr prim_exprToString(EvalState & state, const ATermVector & args) static void prim_exprToString(EvalState & state, Value * * args, Value & v)
{ {
/* !!! this disregards context */ /* !!! this disregards context */
return makeStr(atPrint(evalExpr(state, args[0]))); return makeStr(atPrint(evalExpr(state, args[0])));
} }
static Expr prim_stringToExpr(EvalState & state, const ATermVector & args) static void prim_stringToExpr(EvalState & state, Value * * args, Value & v)
{ {
/* !!! this can introduce arbitrary garbage terms in the /* !!! this can introduce arbitrary garbage terms in the
evaluator! */; evaluator! */;
@ -1028,7 +1028,7 @@ static Expr prim_stringToExpr(EvalState & state, const ATermVector & args)
*************************************************************/ *************************************************************/
static Expr prim_parseDrvName(EvalState & state, const ATermVector & args) static void prim_parseDrvName(EvalState & state, Value * * args, Value & v)
{ {
string name = evalStringNoCtx(state, args[0]); string name = evalStringNoCtx(state, args[0]);
DrvName parsed(name); DrvName parsed(name);
@ -1039,7 +1039,7 @@ static Expr prim_parseDrvName(EvalState & state, const ATermVector & args)
} }
static Expr prim_compareVersions(EvalState & state, const ATermVector & args) static void prim_compareVersions(EvalState & state, Value * * args, Value & v)
{ {
string version1 = evalStringNoCtx(state, args[0]); string version1 = evalStringNoCtx(state, args[0]);
string version2 = evalStringNoCtx(state, args[1]); string version2 = evalStringNoCtx(state, args[1]);
@ -1144,10 +1144,12 @@ void EvalState::createBaseEnv()
addPrimOp("__sub", 2, prim_sub); addPrimOp("__sub", 2, prim_sub);
addPrimOp("__mul", 2, prim_mul); addPrimOp("__mul", 2, prim_mul);
addPrimOp("__div", 2, prim_div); addPrimOp("__div", 2, prim_div);
#endif
addPrimOp("__lessThan", 2, prim_lessThan); addPrimOp("__lessThan", 2, prim_lessThan);
// String manipulation // String manipulation
addPrimOp("toString", 1, prim_toString); addPrimOp("toString", 1, prim_toString);
#if 0
addPrimOp("__substring", 3, prim_substring); addPrimOp("__substring", 3, prim_substring);
addPrimOp("__stringLength", 1, prim_stringLength); addPrimOp("__stringLength", 1, prim_stringLength);
addPrimOp("__unsafeDiscardStringContext", 1, prim_unsafeDiscardStringContext); addPrimOp("__unsafeDiscardStringContext", 1, prim_unsafeDiscardStringContext);

2
src/nix-instantiate/nix-instantiate.cc
View file

@ -159,7 +159,7 @@ void run(Strings args)
evalOnly, xmlOutput, e); evalOnly, xmlOutput, e);
} }
printEvalStats(state); state.printStats();
} }