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Show position info in Boolean operations

This commit is contained in:
Eelco Dolstra 2014-04-04 22:43:52 +02:00
parent bd9b1d97b4
commit 4c5faad994
5 changed files with 28 additions and 31 deletions
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24
src/libexpr/eval.cc
View File

@ -574,6 +574,16 @@ inline bool EvalState::evalBool(Env & env, Expr * e)
}
inline bool EvalState::evalBool(Env & env, Expr * e, const Pos & pos)
{
Value v;
e->eval(*this, env, v);
if (v.type != tBool)
throwTypeError("value is %1% while a Boolean was expected, at %2%", v, pos);
return v.boolean;
}
inline void EvalState::evalAttrs(Env & env, Expr * e, Value & v)
{
e->eval(*this, env, v);
@ -975,7 +985,7 @@ void ExprIf::eval(EvalState & state, Env & env, Value & v)
void ExprAssert::eval(EvalState & state, Env & env, Value & v)
{
if (!state.evalBool(env, cond))
if (!state.evalBool(env, cond, pos))
throwAssertionError("assertion failed at %1%", pos);
body->eval(state, env, v);
}
@ -1016,19 +1026,19 @@ void ExprOpNEq::eval(EvalState & state, Env & env, Value & v)
void ExprOpAnd::eval(EvalState & state, Env & env, Value & v)
{
mkBool(v, state.evalBool(env, e1) && state.evalBool(env, e2));
mkBool(v, state.evalBool(env, e1, pos) && state.evalBool(env, e2, pos));
}
void ExprOpOr::eval(EvalState & state, Env & env, Value & v)
{
mkBool(v, state.evalBool(env, e1) || state.evalBool(env, e2));
mkBool(v, state.evalBool(env, e1, pos) || state.evalBool(env, e2, pos));
}
void ExprOpImpl::eval(EvalState & state, Env & env, Value & v)
{
mkBool(v, !state.evalBool(env, e1) || state.evalBool(env, e2));
mkBool(v, !state.evalBool(env, e1, pos) || state.evalBool(env, e2, pos));
}
@ -1073,18 +1083,18 @@ void ExprOpConcatLists::eval(EvalState & state, Env & env, Value & v)
Value v1; e1->eval(state, env, v1);
Value v2; e2->eval(state, env, v2);
Value * lists[2] = { &v1, &v2 };
state.concatLists(v, 2, lists);
state.concatLists(v, 2, lists, pos);
}
void EvalState::concatLists(Value & v, unsigned int nrLists, Value * * lists)
void EvalState::concatLists(Value & v, unsigned int nrLists, Value * * lists, const Pos & pos)
{
nrListConcats++;
Value * nonEmpty = 0;
unsigned int len = 0;
for (unsigned int n = 0; n < nrLists; ++n) {
forceList(*lists[n]);
forceList(*lists[n], pos);
unsigned int l = lists[n]->list.length;
len += l;
if (l) nonEmpty = lists[n];

3
src/libexpr/eval.hh
View File

@ -145,6 +145,7 @@ public:
/* Evaluation the expression, then verify that it has the expected
type. */
inline bool evalBool(Env & env, Expr * e);
inline bool evalBool(Env & env, Expr * e, const Pos & pos);
inline void evalAttrs(Env & env, Expr * e, Value & v);
/* If `v' is a thunk, enter it and overwrite `v' with the result
@ -246,7 +247,7 @@ public:
void mkThunk_(Value & v, Expr * expr);
void mkPos(Value & v, Pos * pos);
void concatLists(Value & v, unsigned int nrLists, Value * * lists);
void concatLists(Value & v, unsigned int nrLists, Value * * lists, const Pos & pos);
/* Print statistics. */
void printStats();

20
src/libexpr/nixexpr.hh
View File

@ -277,28 +277,13 @@ struct ExprBuiltin : Expr
COMMON_METHODS
};
struct ExprApp : Expr
{
Pos pos;
Expr * e1, * e2;
ExprApp(Expr * e1, Expr * e2) : e1(e1), e2(e2) { };
ExprApp(const Pos & pos, Expr * e1, Expr * e2) : pos(pos), e1(e1), e2(e2) { };
void show(std::ostream & str)
{
str << *e1 << " " << *e2;
}
void bindVars(const StaticEnv & env)
{
e1->bindVars(env); e2->bindVars(env);
}
void eval(EvalState & state, Env & env, Value & v);
};
#define MakeBinOp(name, s) \
struct Expr##name : Expr \
{ \
Pos pos; \
Expr * e1, * e2; \
Expr##name(Expr * e1, Expr * e2) : e1(e1), e2(e2) { }; \
Expr##name(const Pos & pos, Expr * e1, Expr * e2) : pos(pos), e1(e1), e2(e2) { }; \
void show(std::ostream & str) \
{ \
str << *e1 << " " s " " << *e2; \
@ -310,6 +295,7 @@ struct ExprApp : Expr
void eval(EvalState & state, Env & env, Value & v); \
};
MakeBinOp(App, "")
MakeBinOp(OpEq, "==")
MakeBinOp(OpNEq, "!=")
MakeBinOp(OpAnd, "&&")

10
src/libexpr/parser.y
View File

@ -335,10 +335,10 @@ expr_op
| expr_op LEQ expr_op { $$ = new ExprOpNot(new ExprApp(CUR_POS, new ExprApp(new ExprBuiltin(data->symbols.create("lessThan")), $3), $1)); }
| expr_op '>' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprBuiltin(data->symbols.create("lessThan")), $3), $1); }
| expr_op GEQ expr_op { $$ = new ExprOpNot(new ExprApp(CUR_POS, new ExprApp(new ExprBuiltin(data->symbols.create("lessThan")), $1), $3)); }
| expr_op AND expr_op { $$ = new ExprOpAnd($1, $3); }
| expr_op OR expr_op { $$ = new ExprOpOr($1, $3); }
| expr_op IMPL expr_op { $$ = new ExprOpImpl($1, $3); }
| expr_op UPDATE expr_op { $$ = new ExprOpUpdate($1, $3); }
| expr_op AND expr_op { $$ = new ExprOpAnd(CUR_POS, $1, $3); }
| expr_op OR expr_op { $$ = new ExprOpOr(CUR_POS, $1, $3); }
| expr_op IMPL expr_op { $$ = new ExprOpImpl(CUR_POS, $1, $3); }
| expr_op UPDATE expr_op { $$ = new ExprOpUpdate(CUR_POS, $1, $3); }
| expr_op '?' attrpath { $$ = new ExprOpHasAttr($1, *$3); }
| expr_op '+' expr_op
{ vector<Expr *> * l = new vector<Expr *>;
@ -349,7 +349,7 @@ expr_op
| expr_op '-' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprBuiltin(data->symbols.create("sub")), $1), $3); }
| expr_op '*' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprBuiltin(data->symbols.create("mul")), $1), $3); }
| expr_op '/' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprBuiltin(data->symbols.create("div")), $1), $3); }
| expr_op CONCAT expr_op { $$ = new ExprOpConcatLists($1, $3); }
| expr_op CONCAT expr_op { $$ = new ExprOpConcatLists(CUR_POS, $1, $3); }
| expr_app
;

2
src/libexpr/primops.cc
View File

@ -1042,7 +1042,7 @@ static void prim_elem(EvalState & state, const Pos & pos, Value * * args, Value
static void prim_concatLists(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceList(*args[0], pos);
state.concatLists(v, args[0]->list.length, args[0]->list.elems);
state.concatLists(v, args[0]->list.length, args[0]->list.elems, pos);
}