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forceInt: Show position info

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This commit is contained in:
Eelco Dolstra 2014-04-04 18:58:15 +02:00
parent c28de6d96e
commit b62d36963c
3 changed files with 11 additions and 11 deletions
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4
src/libexpr/eval.cc
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@ -1151,11 +1151,11 @@ void EvalState::strictForceValue(Value & v)
} }
NixInt EvalState::forceInt(Value & v) NixInt EvalState::forceInt(Value & v, const Pos & pos)
{ {
forceValue(v); forceValue(v);
if (v.type != tInt) if (v.type != tInt)
throwTypeError("value is %1% while an integer was expected", v); throwTypeError("value is %1% while an integer was expected, at %2%", v, pos);
return v.integer; return v.integer;
} }

2
src/libexpr/eval.hh
View file

@ -158,7 +158,7 @@ public:
void strictForceValue(Value & v); void strictForceValue(Value & v);
/* Force `v', and then verify that it has the expected type. */ /* Force `v', and then verify that it has the expected type. */
NixInt forceInt(Value & v); NixInt forceInt(Value & v, const Pos & pos);
bool forceBool(Value & v); bool forceBool(Value & v);
inline void forceAttrs(Value & v); inline void forceAttrs(Value & v);
inline void forceList(Value & v); inline void forceList(Value & v);

16
src/libexpr/primops.cc
View file

@ -954,7 +954,7 @@ static void elemAt(EvalState & state, const Pos & pos, Value & list, int n, Valu
/* Return the n-1'th element of a list. */ /* Return the n-1'th element of a list. */
static void prim_elemAt(EvalState & state, const Pos & pos, Value * * args, Value & v) static void prim_elemAt(EvalState & state, const Pos & pos, Value * * args, Value & v)
{ {
elemAt(state, pos, *args[0], state.forceInt(*args[1]), v); elemAt(state, pos, *args[0], state.forceInt(*args[1], pos), v);
} }
@ -1061,27 +1061,27 @@ static void prim_length(EvalState & state, const Pos & pos, Value * * args, Valu
static void prim_add(EvalState & state, const Pos & pos, Value * * args, Value & v) static void prim_add(EvalState & state, const Pos & pos, Value * * args, Value & v)
{ {
mkInt(v, state.forceInt(*args[0]) + state.forceInt(*args[1])); mkInt(v, state.forceInt(*args[0], pos) + state.forceInt(*args[1], pos));
} }
static void prim_sub(EvalState & state, const Pos & pos, Value * * args, Value & v) static void prim_sub(EvalState & state, const Pos & pos, Value * * args, Value & v)
{ {
mkInt(v, state.forceInt(*args[0]) - state.forceInt(*args[1])); mkInt(v, state.forceInt(*args[0], pos) - state.forceInt(*args[1], pos));
} }
static void prim_mul(EvalState & state, const Pos & pos, Value * * args, Value & v) static void prim_mul(EvalState & state, const Pos & pos, Value * * args, Value & v)
{ {
mkInt(v, state.forceInt(*args[0]) * state.forceInt(*args[1])); mkInt(v, state.forceInt(*args[0], pos) * state.forceInt(*args[1], pos));
} }
static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value & v) static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value & v)
{ {
NixInt i2 = state.forceInt(*args[1]); NixInt i2 = state.forceInt(*args[1], pos);
if (i2 == 0) throw EvalError(format("division by zero, at %1%") % pos); if (i2 == 0) throw EvalError(format("division by zero, at %1%") % pos);
mkInt(v, state.forceInt(*args[0]) / i2); mkInt(v, state.forceInt(*args[0], pos) / i2);
} }
@ -1116,8 +1116,8 @@ static void prim_toString(EvalState & state, const Pos & pos, Value * * args, Va
non-negative. */ non-negative. */
static void prim_substring(EvalState & state, const Pos & pos, Value * * args, Value & v) static void prim_substring(EvalState & state, const Pos & pos, Value * * args, Value & v)
{ {
int start = state.forceInt(*args[0]); int start = state.forceInt(*args[0], pos);
int len = state.forceInt(*args[1]); int len = state.forceInt(*args[1], pos);
PathSet context; PathSet context;
string s = state.coerceToString(*args[2], context); string s = state.coerceToString(*args[2], context);