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authorzimbatm <zimbatm@zimbatm.com>2018-01-29T12·36+0000
committerzimbatm <zimbatm@zimbatm.com>2019-03-24T10·36+0100
commit514b3c7f8345cfcbbe166981214497ed9d93ae18 (patch)
treec9b5d3dec07486f41dbb31a9a0e12c83426e346e /src/libexpr
parent56f1ed55791fc7e8671f10263baa7a9d15b47c4b (diff)
Add isPath primop
this is added for completeness' sake since all the other possible
`builtins.typeOf` results have a corresponding `builtins.is<Type>`
Diffstat (limited to 'src/libexpr')
-rw-r--r--src/libexpr/primops.cc7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 6b0c55e72cd9..39073725e9c4 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -315,6 +315,12 @@ static void prim_isBool(EvalState & state, const Pos & pos, Value * * args, Valu
     mkBool(v, args[0]->type == tBool);
 }
 
+/* Determine whether the argument is a path. */
+static void prim_isPath(EvalState & state, const Pos & pos, Value * * args, Value & v)
+{
+    state.forceValue(*args[0]);
+    mkBool(v, args[0]->type == tPath);
+}
 
 struct CompareValues
 {
@@ -2169,6 +2175,7 @@ void EvalState::createBaseEnv()
     addPrimOp("__isInt", 1, prim_isInt);
     addPrimOp("__isFloat", 1, prim_isFloat);
     addPrimOp("__isBool", 1, prim_isBool);
+    addPrimOp("__isPath", 1, prim_isPath);
     addPrimOp("__genericClosure", 1, prim_genericClosure);
     addPrimOp("abort", 1, prim_abort);
     addPrimOp("__addErrorContext", 2, prim_addErrorContext);