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== operator: Ignore string context

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There really is no case I can think of where taking the context into
account is useful. Mostly it's just very inconvenient.
This commit is contained in:
Eelco Dolstra 2014-06-10 14:02:56 +02:00
parent b1beed97a0
commit ee7fe64c0a
3 changed files with 4 additions and 13 deletions
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13
src/libexpr/eval.cc
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@ -1355,17 +1355,8 @@ bool EvalState::eqValues(Value & v1, Value & v2)
case tBool: case tBool:
return v1.boolean == v2.boolean; return v1.boolean == v2.boolean;
case tString: { case tString:
/* Compare both the string and its context. */ return strcmp(v1.string.s, v2.string.s) == 0;
if (strcmp(v1.string.s, v2.string.s) != 0) return false;
const char * * p = v1.string.context, * * q = v2.string.context;
if (!p && !q) return true;
if (!p || !q) return false;
for ( ; *p && *q; ++p, ++q)
if (strcmp(*p, *q) != 0) return false;
if (*p || *q) return false;
return true;
}
case tPath: case tPath:
return strcmp(v1.path, v2.path) == 0; return strcmp(v1.path, v2.path) == 0;

2
src/libexpr/primops.cc
View file

@ -1297,7 +1297,7 @@ void EvalState::createBaseEnv()
language feature gets added. It's not necessary to increase it language feature gets added. It's not necessary to increase it
when primops get added, because you can just use `builtins ? when primops get added, because you can just use `builtins ?
primOp' to check. */ primOp' to check. */
mkInt(v, 2); mkInt(v, 3);
addConstant("__langVersion", v); addConstant("__langVersion", v);
// Miscellaneous // Miscellaneous

2
tests/lang/eval-okay-context.nix
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@ -1,6 +1,6 @@
let s = "foo ${builtins.substring 33 100 (baseNameOf ./eval-okay-context.nix)} bar"; let s = "foo ${builtins.substring 33 100 (baseNameOf ./eval-okay-context.nix)} bar";
in in
if s == "foo eval-okay-context.nix bar" if s != "foo eval-okay-context.nix bar"
then abort "context not discarded" then abort "context not discarded"
else builtins.unsafeDiscardStringContext s else builtins.unsafeDiscardStringContext s