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C API: Add nix_value_call_multi, NIX_VALUE_CALL

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_multi can be implemented more efficiently.
NIX_VALUE_CALL is a convenient way to invoke it.
This commit is contained in:
Robert Hensing 2024-05-23 19:55:32 +02:00
parent ab106c5ca3
commit 2497d10351
3 changed files with 100 additions and 1 deletions
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49
tests/unit/libexpr/nix_api_expr.cc
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@ -250,7 +250,7 @@ static void primop_repeat(void * user_data, nix_c_context * context, EvalState *
nix_init_string(context, ret, result.c_str());
}
TEST_F(nix_api_expr_test, nix_expr_primop_arity_2)
TEST_F(nix_api_expr_test, nix_expr_primop_arity_2_multiple_calls)
{
PrimOp * primop =
nix_alloc_primop(ctx, primop_repeat, 2, "repeat", nullptr, "repeat a string", (void *) SAMPLE_USER_DATA);
@ -285,6 +285,38 @@ TEST_F(nix_api_expr_test, nix_expr_primop_arity_2)
ASSERT_STREQ("hellohellohello", r.c_str());
}
TEST_F(nix_api_expr_test, nix_expr_primop_arity_2_single_call)
{
PrimOp * primop =
nix_alloc_primop(ctx, primop_repeat, 2, "repeat", nullptr, "repeat a string", (void *) SAMPLE_USER_DATA);
assert_ctx_ok();
Value * primopValue = nix_alloc_value(ctx, state);
assert_ctx_ok();
nix_init_primop(ctx, primopValue, primop);
assert_ctx_ok();
Value * hello = nix_alloc_value(ctx, state);
assert_ctx_ok();
nix_init_string(ctx, hello, "hello");
assert_ctx_ok();
Value * three = nix_alloc_value(ctx, state);
assert_ctx_ok();
nix_init_int(ctx, three, 3);
assert_ctx_ok();
Value * result = nix_alloc_value(ctx, state);
assert_ctx_ok();
NIX_VALUE_CALL(ctx, state, result, primopValue, hello, three);
assert_ctx_ok();
std::string r;
nix_get_string(ctx, result, OBSERVE_STRING(r));
assert_ctx_ok();
ASSERT_STREQ("hellohellohello", r.c_str());
}
static void
primop_bad_no_return(void * user_data, nix_c_context * context, EvalState * state, Value ** args, Value * ret)
{
@ -357,4 +389,19 @@ TEST_F(nix_api_expr_test, nix_expr_primop_bad_return_thunk)
testing::HasSubstr("Implementation error in custom function: return value must not be a thunk")));
ASSERT_THAT(ctx->last_err, testing::Optional(testing::HasSubstr("badReturnThunk")));
}
TEST_F(nix_api_expr_test, nix_value_call_multi_no_args)
{
Value * n = nix_alloc_value(ctx, state);
nix_init_int(ctx, n, 3);
assert_ctx_ok();
Value * r = nix_alloc_value(ctx, state);
nix_value_call_multi(ctx, state, n, 0, nullptr, r);
assert_ctx_ok();
auto rInt = nix_get_int(ctx, r);
assert_ctx_ok();
ASSERT_EQ(3, rInt);
}
} // namespace nixC