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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TOOLS_CDDL_PARSE_H_
#define TOOLS_CDDL_PARSE_H_
#include <stddef.h>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
struct AstNode {
// These types all correspond to types in the grammar, which can be found in
// grammar.abnf.
enum class Type {
kRule,
kTypename,
kGroupname,
kAssign,
kAssignT,
kAssignG,
kType,
kGrpent,
kType1,
kType2,
kValue,
kGroup,
kUint,
kDigit,
kRangeop,
kCtlop,
kGrpchoice,
kOccur,
kMemberKey,
kId,
kNumber,
kText,
kBytes,
kOther,
};
// A node that (along with its' sublings) represents some sub-section of the
// text represented by this node.
AstNode* children;
// Pointer to the next sibling of this node in the siblings linked list.
AstNode* sibling;
// Type of node being represented.
Type type;
// Text parsed from the CDDL spec to create this node.
std::string text;
// Text parsed from another source but used when serializing this node.
std::string integer_member_key_text;
// Text parsed from the CDDL spec for the type key.
absl::optional<std::string> type_key;
};
// Override for << operator to simplify logging.
// NOTE: If a new enum value is added without modifying this operator, it will
// lead to a compilation failure because an enum class is used.
inline std::ostream& operator<<(std::ostream& os, const AstNode::Type& which) {
switch (which) {
case AstNode::Type::kRule:
os << "kRule";
break;
case AstNode::Type::kTypename:
os << "kTypename";
break;
case AstNode::Type::kGroupname:
os << "kGroupname";
break;
case AstNode::Type::kAssign:
os << "kAssign";
break;
case AstNode::Type::kAssignT:
os << "kAssignT";
break;
case AstNode::Type::kAssignG:
os << "kAssignG";
break;
case AstNode::Type::kType:
os << "kType";
break;
case AstNode::Type::kGrpent:
os << "kGrpent";
break;
case AstNode::Type::kType1:
os << "kType1";
break;
case AstNode::Type::kType2:
os << "kType2";
break;
case AstNode::Type::kValue:
os << "kValue";
break;
case AstNode::Type::kGroup:
os << "kGroup";
break;
case AstNode::Type::kUint:
os << "kUint";
break;
case AstNode::Type::kDigit:
os << "kDigit";
break;
case AstNode::Type::kRangeop:
os << "kRangeop";
break;
case AstNode::Type::kCtlop:
os << "kCtlop";
break;
case AstNode::Type::kGrpchoice:
os << "kGrpchoice";
break;
case AstNode::Type::kOccur:
os << "kOccur";
break;
case AstNode::Type::kMemberKey:
os << "kMemberKey";
break;
case AstNode::Type::kId:
os << "kId";
break;
case AstNode::Type::kNumber:
os << "kNumber";
break;
case AstNode::Type::kText:
os << "kText";
break;
case AstNode::Type::kBytes:
os << "kBytes";
break;
case AstNode::Type::kOther:
os << "kOther";
break;
}
return os;
}
struct ParseResult {
AstNode* root;
std::vector<std::unique_ptr<AstNode>> nodes;
};
ParseResult ParseCddl(absl::string_view data);
void DumpAst(AstNode* node, int indent_level = 0);
#endif // TOOLS_CDDL_PARSE_H_
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