Files
carbon-lang/toolchain/check/handle_array.cpp
T
Chandler Carruth 8c64f0bfdd Add -Wmissing-prototypes and fix issues it finds. (#4019)
Most of these are places where we failed to include a header file and
simply never got an error about this. The fix is to include the header
file.

Most other cases are functions that should have been marked `static` but
were not. Finding all of these was a main motivation for me enabling the
warning despite how much work it is.

One complicating factor was that we weren't including the `handle.h` for
all the state-based handler functions. While this isn't a tiny amount of
code, it is just declarations and doesn't add any extra dependencies. It
also lets us have the checking for which functions need to be `static`
and which don't. For the `parse` library I had to add the `handle.h`
header as well, I tried to match the design of it in `check`.

I have also had to work around a bug in the warning, but given the value
it seems to be providing, that seems reasonable. I've filed the bug
upstream: https://github.com/llvm/llvm-project/issues/94138

I also had to use some hacks to work around limitations of Bazel rules
that wrap `cc_library` rules and don't expose `copts`. I filed a bug for
`cc_proto_library` specifically:
~https://github.com/bazelbuild/bazel/issues/22610~ 
https://github.com/bazelbuild/bazel/issues/4446
2024-06-04 20:04:45 +00:00

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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "toolchain/check/context.h"
#include "toolchain/check/convert.h"
#include "toolchain/check/handle.h"
#include "toolchain/parse/node_kind.h"
namespace Carbon::Check {
auto HandleArrayExprStart(Context& /*context*/,
Parse::ArrayExprStartId /*node_id*/) -> bool {
return true;
}
auto HandleArrayExprSemi(Context& context, Parse::ArrayExprSemiId node_id)
-> bool {
context.node_stack().Push(node_id);
return true;
}
auto HandleArrayExpr(Context& context, Parse::ArrayExprId node_id) -> bool {
// TODO: Handle array type with undefined bound.
if (context.node_stack()
.PopAndDiscardSoloNodeIdIf<Parse::NodeKind::ArrayExprSemi>()) {
context.node_stack().PopAndIgnore();
return context.TODO(node_id, "HandleArrayExprWithoutBounds");
}
auto bound_inst_id = context.node_stack().PopExpr();
context.node_stack()
.PopAndDiscardSoloNodeId<Parse::NodeKind::ArrayExprSemi>();
auto [element_type_node_id, element_type_inst_id] =
context.node_stack().PopExprWithNodeId();
// The array bound must be a constant.
//
// TODO: Should we support runtime-phase bounds in cases such as:
// comptime fn F(n: i32) -> type { return [i32; n]; }
auto bound_inst = context.constant_values().Get(bound_inst_id);
if (!bound_inst.is_constant()) {
CARBON_DIAGNOSTIC(InvalidArrayExpr, Error,
"Array bound is not a constant.");
context.emitter().Emit(bound_inst_id, InvalidArrayExpr);
context.node_stack().Push(node_id, SemIR::InstId::BuiltinError);
return true;
}
context.AddInstAndPush<SemIR::ArrayType>(
node_id, {.type_id = SemIR::TypeId::TypeType,
.bound_id = bound_inst_id,
.element_type_id = ExprAsType(context, element_type_node_id,
element_type_inst_id)});
return true;
}
} // namespace Carbon::Check