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FIx floating point evaluation 

Fixes #2361.
This commit is contained in:
Eelco Dolstra 2018-08-19 11:59:49 +02:00
parent d277442df5
commit 9b1bdf2db8
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GPG Key ID: 8170B4726D7198DE
3 changed files with 16 additions and 0 deletions
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9
src/libexpr/primops.cc
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@ -1680,6 +1680,8 @@ static void prim_concatMap(EvalState & state, const Pos & pos, Value * * args, V
static void prim_add(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
if (args[0]->type == tFloat || args[1]->type == tFloat)
mkFloat(v, state.forceFloat(*args[0], pos) + state.forceFloat(*args[1], pos));
else
@ -1689,6 +1691,8 @@ static void prim_add(EvalState & state, const Pos & pos, Value * * args, Value &
static void prim_sub(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
if (args[0]->type == tFloat || args[1]->type == tFloat)
mkFloat(v, state.forceFloat(*args[0], pos) - state.forceFloat(*args[1], pos));
else
@ -1698,6 +1702,8 @@ static void prim_sub(EvalState & state, const Pos & pos, Value * * args, Value &
static void prim_mul(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
if (args[0]->type == tFloat || args[1]->type == tFloat)
mkFloat(v, state.forceFloat(*args[0], pos) * state.forceFloat(*args[1], pos));
else
@ -1707,6 +1713,9 @@ static void prim_mul(EvalState & state, const Pos & pos, Value * * args, Value &
static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
state.forceValue(*args[1], pos);
NixFloat f2 = state.forceFloat(*args[1], pos);
if (f2 == 0) throw EvalError(format("division by zero, at %1%") % pos);

1
tests/lang/eval-okay-float.exp Normal file
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@ -0,0 +1 @@
[ 3.4 3.5 2.5 1.5 ]

6
tests/lang/eval-okay-float.nix Normal file
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@ -0,0 +1,6 @@
[
(1.1 + 2.3)
(builtins.add (0.5 + 0.5) (2.0 + 0.5))
((0.5 + 0.5) * (2.0 + 0.5))
((1.5 + 1.5) / (0.5 * 4.0))
]