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Switch Ptr to a C++ pointer using the nonnull attribute (#831)

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The advantage is a C++ pointer is special, and this approach eliminates the Ptr class type that was causing problems in conversions. Attribute suggestion was courtesy of chandlerc. We're sticking with the Ptr name because it's shorter than Nonnull, and we're likely to keep this in lots of places.
This commit is contained in:
Jon Meow
2021-09-16 13:05:25 -07:00
committed by GitHub
parent 395a331cde
commit ff319d311a
6 changed files with 28 additions and 62 deletions
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executable_semantics/interpreter/interpreter.cpp
+2 -2
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@@ -465,7 +465,7 @@ auto Interpreter::StepExp() -> Transition {
} else {
// { { v :: [][i] :: C, E, F} :: S, H}
// -> { { v_i :: C, E, F} : S, H}
auto* tuple = dyn_cast<TupleValue>(act->Results()[0].Get());
auto* tuple = dyn_cast<TupleValue>(act->Results()[0]);
if (tuple == nullptr) {
FATAL_RUNTIME_ERROR_NO_LINE()
<< "expected a tuple in field access, not " << *act->Results()[0];
@@ -578,7 +578,7 @@ auto Interpreter::StepExp() -> Transition {
// TODO: Think about a cleaner way to cast between Ptr types.
// (multiple TODOs)
.function = Ptr<const FunctionValue>(
cast<FunctionValue>(act->Results()[0].Get())),
cast<FunctionValue>(act->Results()[0])),
.args = act->Results()[1],
.loc = exp->SourceLoc()};
default: