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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
#ifndef T_SCOPE_H
#define T_SCOPE_H
#include <map>
#include <string>
#include <sstream>
#include "thrift/parse/t_type.h"
#include "thrift/parse/t_service.h"
#include "thrift/parse/t_const.h"
#include "thrift/parse/t_const_value.h"
#include "thrift/parse/t_base_type.h"
#include "thrift/parse/t_map.h"
#include "thrift/parse/t_list.h"
namespace plugin_output {
template <typename From, typename To>
void convert(From*, To&);
}
/**
* This represents a variable scope used for looking up predefined types and
* services. Typically, a scope is associated with a t_program. Scopes are not
* used to determine code generation, but rather to resolve identifiers at
* parse time.
*
*/
class t_scope {
public:
t_scope() {}
void add_type(std::string name, t_type* type) { types_[name] = type; }
t_type* get_type(std::string name) { return types_[name]; }
void add_service(std::string name, t_service* service) { services_[name] = service; }
t_service* get_service(std::string name) { return services_[name]; }
void add_constant(std::string name, t_const* constant) {
if (constants_.find(name) != constants_.end()) {
throw "Enum " + name + " is already defined!";
} else {
constants_[name] = constant;
}
}
t_const* get_constant(std::string name) { return constants_[name]; }
void print() {
std::map<std::string, t_type*>::iterator iter;
for (iter = types_.begin(); iter != types_.end(); ++iter) {
printf("%s => %s\n", iter->first.c_str(), iter->second->get_name().c_str());
}
}
void resolve_const_value(t_const_value* const_val, t_type* ttype) {
if (ttype->is_map()) {
const std::map<t_const_value*, t_const_value*>& map = const_val->get_map();
std::map<t_const_value*, t_const_value*>::const_iterator v_iter;
for (v_iter = map.begin(); v_iter != map.end(); ++v_iter) {
resolve_const_value(v_iter->first, ((t_map*)ttype)->get_key_type());
resolve_const_value(v_iter->second, ((t_map*)ttype)->get_val_type());
}
} else if (ttype->is_list() || ttype->is_set()) {
const std::vector<t_const_value*>& val = const_val->get_list();
std::vector<t_const_value*>::const_iterator v_iter;
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
resolve_const_value((*v_iter), ((t_list*)ttype)->get_elem_type());
}
} else if (ttype->is_struct()) {
t_struct* tstruct = (t_struct*)ttype;
const std::map<t_const_value*, t_const_value*>& map = const_val->get_map();
std::map<t_const_value*, t_const_value*>::const_iterator v_iter;
for (v_iter = map.begin(); v_iter != map.end(); ++v_iter) {
t_field* field = tstruct->get_field_by_name(v_iter->first->get_string());
if (field == NULL) {
throw "No field named \"" + v_iter->first->get_string()
+ "\" was found in struct of type \"" + tstruct->get_name() + "\"";
}
resolve_const_value(v_iter->second, field->get_type());
}
} else if (const_val->get_type() == t_const_value::CV_IDENTIFIER) {
if (ttype->is_enum()) {
const_val->set_enum((t_enum*)ttype);
} else {
t_const* constant = get_constant(const_val->get_identifier());
if (constant == NULL) {
throw "No enum value or constant found named \"" + const_val->get_identifier() + "\"!";
}
// Resolve typedefs to the underlying type
t_type* const_type = constant->get_type()->get_true_type();
if (const_type->is_base_type()) {
switch (((t_base_type*)const_type)->get_base()) {
case t_base_type::TYPE_I16:
case t_base_type::TYPE_I32:
case t_base_type::TYPE_I64:
case t_base_type::TYPE_BOOL:
case t_base_type::TYPE_I8:
const_val->set_integer(constant->get_value()->get_integer());
break;
case t_base_type::TYPE_STRING:
const_val->set_string(constant->get_value()->get_string());
break;
case t_base_type::TYPE_DOUBLE:
const_val->set_double(constant->get_value()->get_double());
break;
case t_base_type::TYPE_VOID:
throw "Constants cannot be of type VOID";
}
} else if (const_type->is_map()) {
const std::map<t_const_value*, t_const_value*>& map = constant->get_value()->get_map();
std::map<t_const_value*, t_const_value*>::const_iterator v_iter;
const_val->set_map();
for (v_iter = map.begin(); v_iter != map.end(); ++v_iter) {
const_val->add_map(v_iter->first, v_iter->second);
}
} else if (const_type->is_list()) {
const std::vector<t_const_value*>& val = constant->get_value()->get_list();
std::vector<t_const_value*>::const_iterator v_iter;
const_val->set_list();
for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
const_val->add_list(*v_iter);
}
}
}
} else if (ttype->is_enum()) {
// enum constant with non-identifier value. set the enum and find the
// value's name.
t_enum* tenum = (t_enum*)ttype;
t_enum_value* enum_value = tenum->get_constant_by_value(const_val->get_integer());
if (enum_value == NULL) {
std::ostringstream valstm;
valstm << const_val->get_integer();
throw "Couldn't find a named value in enum " + tenum->get_name() + " for value "
+ valstm.str();
}
const_val->set_identifier(tenum->get_name() + "." + enum_value->get_name());
const_val->set_enum(tenum);
}
}
private:
// Map of names to types
std::map<std::string, t_type*> types_;
// Map of names to constants
std::map<std::string, t_const*> constants_;
// Map of names to services
std::map<std::string, t_service*> services_;
// to list map entries
template <typename From, typename To>
friend void plugin_output::convert(From*, To&);
};
#endif
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