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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/ast/array.h"
#include <cmath>
#include <utility>
#include "src/tint/program_builder.h"
TINT_INSTANTIATE_TYPEINFO(tint::ast::Array);
namespace tint::ast {
namespace {
// Returns the string representation of an array size expression.
std::string SizeExprToString(const Expression* size, const SymbolTable& symbols) {
if (auto* ident = size->As<IdentifierExpression>()) {
return symbols.NameFor(ident->symbol);
}
if (auto* literal = size->As<IntLiteralExpression>()) {
return std::to_string(literal->value);
}
// This will never be exposed to the user as the Resolver will reject this
// expression for array size.
return "<invalid>";
}
} // namespace
Array::Array(ProgramID pid,
NodeID nid,
const Source& src,
const Type* subtype,
const Expression* cnt,
utils::VectorRef<const Attribute*> attrs)
: Base(pid, nid, src), type(subtype), count(cnt), attributes(std::move(attrs)) {}
Array::Array(Array&&) = default;
Array::~Array() = default;
std::string Array::FriendlyName(const SymbolTable& symbols) const {
std::ostringstream out;
for (auto* attr : attributes) {
if (auto* stride = attr->As<ast::StrideAttribute>()) {
out << "@stride(" << stride->stride << ") ";
}
}
out << "array";
if (type) {
out << "<" << type->FriendlyName(symbols);
if (count) {
out << ", " << SizeExprToString(count, symbols);
}
out << ">";
}
return out.str();
}
const Array* Array::Clone(CloneContext* ctx) const {
// Clone arguments outside of create() call to have deterministic ordering
auto src = ctx->Clone(source);
auto* ty = ctx->Clone(type);
auto* cnt = ctx->Clone(count);
auto attrs = ctx->Clone(attributes);
return ctx->dst->create<Array>(src, ty, cnt, std::move(attrs));
}
} // namespace tint::ast