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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/ast/function.h"
#include <sstream>
#include "src/ast/decorated_variable.h"
namespace tint {
namespace ast {
Function::Function() = default;
Function::Function(const std::string& name,
VariableList params,
type::Type* return_type)
: Node(),
name_(name),
params_(std::move(params)),
return_type_(return_type),
body_(std::make_unique<BlockStatement>()) {}
Function::Function(const Source& source,
const std::string& name,
VariableList params,
type::Type* return_type)
: Node(source),
name_(name),
params_(std::move(params)),
return_type_(return_type),
body_(std::make_unique<BlockStatement>()) {}
Function::Function(Function&&) = default;
Function::~Function() = default;
void Function::add_referenced_module_variable(Variable* var) {
for (const auto* v : referenced_module_vars_) {
if (v->name() == var->name()) {
return;
}
}
referenced_module_vars_.push_back(var);
}
const std::vector<std::pair<Variable*, LocationDecoration*>>
Function::referenced_location_variables() const {
std::vector<std::pair<Variable*, LocationDecoration*>> ret;
for (auto* var : referenced_module_variables()) {
if (!var->IsDecorated()) {
continue;
}
for (auto& deco : var->AsDecorated()->decorations()) {
if (deco->IsLocation()) {
ret.push_back({var, deco.get()->AsLocation()});
break;
}
}
}
return ret;
}
const std::vector<std::pair<Variable*, Function::BindingInfo>>
Function::referenced_uniform_variables() const {
std::vector<std::pair<Variable*, Function::BindingInfo>> ret;
for (auto* var : referenced_module_variables()) {
if (!var->IsDecorated() ||
var->storage_class() != ast::StorageClass::kUniform) {
continue;
}
BindingDecoration* binding = nullptr;
SetDecoration* set = nullptr;
for (const auto& deco : var->AsDecorated()->decorations()) {
if (deco->IsBinding()) {
binding = deco->AsBinding();
} else if (deco->IsSet()) {
set = deco->AsSet();
}
}
if (binding == nullptr || set == nullptr) {
continue;
}
ret.push_back({var, BindingInfo{binding, set}});
}
return ret;
}
const std::vector<std::pair<Variable*, Function::BindingInfo>>
Function::referenced_storagebuffer_variables() const {
std::vector<std::pair<Variable*, Function::BindingInfo>> ret;
for (auto* var : referenced_module_variables()) {
if (!var->IsDecorated() ||
var->storage_class() != ast::StorageClass::kStorageBuffer) {
continue;
}
BindingDecoration* binding = nullptr;
SetDecoration* set = nullptr;
for (const auto& deco : var->AsDecorated()->decorations()) {
if (deco->IsBinding()) {
binding = deco->AsBinding();
} else if (deco->IsSet()) {
set = deco->AsSet();
}
}
if (binding == nullptr || set == nullptr) {
continue;
}
ret.push_back({var, BindingInfo{binding, set}});
}
return ret;
}
const std::vector<std::pair<Variable*, BuiltinDecoration*>>
Function::referenced_builtin_variables() const {
std::vector<std::pair<Variable*, BuiltinDecoration*>> ret;
for (auto* var : referenced_module_variables()) {
if (!var->IsDecorated()) {
continue;
}
for (auto& deco : var->AsDecorated()->decorations()) {
if (deco->IsBuiltin()) {
ret.push_back({var, deco.get()->AsBuiltin()});
break;
}
}
}
return ret;
}
void Function::add_ancestor_entry_point(const std::string& ep) {
for (const auto& point : ancestor_entry_points_) {
if (point == ep) {
return;
}
}
ancestor_entry_points_.push_back(ep);
}
bool Function::HasAncestorEntryPoint(const std::string& name) const {
for (const auto& point : ancestor_entry_points_) {
if (point == name) {
return true;
}
}
return false;
}
const Statement* Function::get_last_statement() const {
return body_->last();
}
bool Function::IsValid() const {
for (const auto& param : params_) {
if (param == nullptr || !param->IsValid())
return false;
}
if (body_ == nullptr || !body_->IsValid()) {
return false;
}
if (name_.length() == 0) {
return false;
}
if (return_type_ == nullptr) {
return false;
}
return true;
}
void Function::to_str(std::ostream& out, size_t indent) const {
make_indent(out, indent);
out << "Function " << name_ << " -> " << return_type_->type_name()
<< std::endl;
make_indent(out, indent);
out << "(";
if (params_.size() > 0) {
out << std::endl;
for (const auto& param : params_)
param->to_str(out, indent + 2);
make_indent(out, indent);
}
out << ")" << std::endl;
make_indent(out, indent);
out << "{" << std::endl;
if (body_ != nullptr) {
for (const auto& stmt : *body_) {
stmt->to_str(out, indent + 2);
}
}
make_indent(out, indent);
out << "}" << std::endl;
}
std::string Function::type_name() const {
std::ostringstream out;
out << "__func" + return_type_->type_name();
for (const auto& param : params_) {
out << param->type()->type_name();
}
return out.str();
}
} // namespace ast
} // namespace tint