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// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in

// all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

// THE SOFTWARE.

#include "AST.h"

#include "ASTVisitor.h"

#include "ASTMatcher.h"

#include "MemoryPool.h"

#include <cassert>

#include <algorithm>

using namespace CPlusPlus;

AST::AST()

{ }

AST::~AST()

{ assert(0); }

void AST::accept(ASTVisitor *visitor)

{

    if (visitor->preVisit(this))

        accept0(visitor);

    visitor->postVisit(this);

}

bool AST::match(AST *ast, AST *pattern, ASTMatcher *matcher)

{

    if (ast == pattern)

        return true;

    else if (! ast || ! pattern)

        return false;

    return ast->match(pattern, matcher);

}

bool AST::match(AST *pattern, ASTMatcher *matcher)

{

    return match0(pattern, matcher);

}

unsigned AttributeSpecifierAST::firstToken() const

{

    return attribute_token;

}

unsigned AttributeSpecifierAST::lastToken() const

{

    if (second_rparen_token)

        return second_rparen_token + 1;

    else if (first_rparen_token)

        return first_rparen_token + 1;

    else if (attribute_list)

        return attribute_list->lastToken();

    else if (second_lparen_token)

        return second_lparen_token + 1;

    else if (first_lparen_token)

        return first_lparen_token + 1;

    return attribute_token + 1;

}

unsigned AttributeAST::firstToken() const

{

    return identifier_token;

}

unsigned AttributeAST::lastToken() const

{

    if (rparen_token)

        return rparen_token + 1;

    else if (expression_list)

        return expression_list->lastToken();

    else if (tag_token)

        return tag_token + 1;

    else if (lparen_token)

        return lparen_token + 1;

    return identifier_token + 1;

}

unsigned AccessDeclarationAST::firstToken() const

{

    return access_specifier_token;

}

unsigned AccessDeclarationAST::lastToken() const

{

    if (colon_token)

        return colon_token + 1;

    else if (slots_token)

        return slots_token + 1;

    return access_specifier_token + 1;

}

#ifdef ICHECK_BUILD

unsigned QPropertyDeclarationAST::firstToken() const

{

    return property_specifier_token;

}

unsigned QPropertyDeclarationAST::lastToken() const

{

    return rparen_token;

}

unsigned QEnumDeclarationAST::firstToken() const

{

    return enum_specifier_token;

}

unsigned QEnumDeclarationAST::lastToken() const

{

    return rparen_token;

}

unsigned QFlagsDeclarationAST::firstToken() const

{

    return this->flags_specifier_token;

}

unsigned QFlagsDeclarationAST::lastToken() const

{

    return rparen_token;

}

unsigned QDeclareFlagsDeclarationAST::firstToken() const

{

    return declareflags_specifier_token;

}

unsigned QDeclareFlagsDeclarationAST::lastToken() const

{

    return rparen_token;

}

#endif

unsigned ArrayAccessAST::firstToken() const

{

    return lbracket_token;

}

unsigned ArrayAccessAST::lastToken() const

{

    if (rbracket_token)

        return rbracket_token + 1;

    else if (expression)

        return expression->lastToken();

    return lbracket_token + 1;

}

unsigned ArrayDeclaratorAST::firstToken() const

{

    return lbracket_token;

}

unsigned ArrayDeclaratorAST::lastToken() const

{

    if (rbracket_token)

        return rbracket_token + 1;

    else if (expression)

        return expression->lastToken();

    return lbracket_token + 1;

}

unsigned ArrayInitializerAST::firstToken() const

{

    return lbrace_token;

}

unsigned ArrayInitializerAST::lastToken() const

{

    if (rbrace_token)

        return rbrace_token + 1;

    else if (expression_list)

        return expression_list->lastToken();

    return lbrace_token + 1;

}

unsigned AsmDefinitionAST::firstToken() const

{

    return asm_token;

}

unsigned AsmDefinitionAST::lastToken() const

{

    if (semicolon_token)

        return semicolon_token + 1;

    else if (rparen_token)

        return rparen_token + 1;

    else if (lparen_token)

        return lparen_token + 1;

    else if (volatile_token)

        return volatile_token + 1;

    return asm_token + 1;

}

unsigned BaseSpecifierAST::firstToken() const

{

    if (virtual_token && access_specifier_token)

        return std::min(virtual_token, access_specifier_token);

    return name->firstToken();

}

unsigned BaseSpecifierAST::lastToken() const

{

    if (name)

        return name->lastToken();

    else if (virtual_token && access_specifier_token)

        return std::min(virtual_token, access_specifier_token) + 1;

    else if (virtual_token)

        return virtual_token + 1;

    else if (access_specifier_token)

        return access_specifier_token + 1;

    // assert?

    return 0;

}

unsigned QtMethodAST::firstToken() const

{ return method_token; }

unsigned QtMethodAST::lastToken() const

{

    if (rparen_token)

        return rparen_token + 1;

    else if (declarator)

        return declarator->lastToken();

    else if (lparen_token)

        return lparen_token + 1;

    return method_token + 1;

}

unsigned QtMemberDeclarationAST::firstToken() const

{

    return q_token;

}

unsigned QtMemberDeclarationAST::lastToken() const

{

    if (rparen_token)

        return rparen_token + 1;

    else if (type_id)

        return type_id->lastToken();

    else if (lparen_token)

        return lparen_token + 1;

    return q_token + 1;

}

unsigned BinaryExpressionAST::firstToken() const

{

    return left_expression->firstToken();

}

unsigned BinaryExpressionAST::lastToken() const

{

    if (right_expression)

        return right_expression->lastToken();

    else if (binary_op_token)

        return binary_op_token + 1;

    return left_expression->lastToken();

}

unsigned BoolLiteralAST::firstToken() const

{

    return literal_token;

}

unsigned BoolLiteralAST::lastToken() const

{

    return literal_token + 1;

}

unsigned CompoundLiteralAST::firstToken() const

{

    return lparen_token;

}

unsigned CompoundLiteralAST::lastToken() const

{

    if (initializer)

        return initializer->lastToken();

    else if (rparen_token)

        return rparen_token + 1;

    else if (type_id)

        return type_id->lastToken();

    return lparen_token + 1;

}

unsigned BreakStatementAST::firstToken() const

{

    return break_token;

}

unsigned BreakStatementAST::lastToken() const

{

    if (semicolon_token)

        return semicolon_token + 1;

    return break_token + 1;

}

unsigned CallAST::firstToken() const

{

    return lparen_token;

}

unsigned CallAST::lastToken() const

{

    if (rparen_token)

        return rparen_token + 1;

    else if (expression_list)

        return expression_list->lastToken();

    return lparen_token + 1;

}

unsigned CaseStatementAST::firstToken() const

{

    return case_token;

}

unsigned CaseStatementAST::lastToken() const

{

    if (statement)

        return statement->lastToken();

    else if (colon_token)

        return colon_token + 1;

    else if (expression)

        return expression->lastToken();

    return case_token + 1;

}

unsigned CastExpressionAST::firstToken() const

{

    return lparen_token;

}

unsigned CastExpressionAST::lastToken() const

{

    if (expression)

        return expression->lastToken();

    else if (rparen_token)

        return rparen_token + 1;

    else if (type_id)

        return type_id->lastToken();

    return lparen_token + 1;

}

unsigned CatchClauseAST::firstToken() const

{

    return catch_token;

}

unsigned CatchClauseAST::lastToken() const

{

    if (statement)

        return statement->lastToken();

    else if (rparen_token)

        return rparen_token + 1;

    if (exception_declaration)

        return exception_declaration->lastToken();

    if (lparen_token)

        return lparen_token + 1;

    return catch_token + 1;

}

unsigned ClassSpecifierAST::firstToken() const

{

    return classkey_token;

}

unsigned ClassSpecifierAST::lastToken() const

{

    if (rbrace_token)

        return rbrace_token + 1;

    else if (member_specifier_list)

        return member_specifier_list->lastToken();

    else if (lbrace_token)

        return lbrace_token + 1;

    else if (base_clause_list)

        return base_clause_list->lastToken();

    else if (colon_token)

        return colon_token + 1;

    else if (name)

        return name->lastToken();

    else if (attribute_list)

        return attribute_list->lastToken();

    return classkey_token + 1;

}

unsigned CompoundStatementAST::firstToken() const

{

    return lbrace_token;

}

unsigned CompoundStatementAST::lastToken() const

{

    if (rbrace_token)

        return rbrace_token + 1;

    else if (statement_list)

        return statement_list->lastToken();

    return lbrace_token + 1;

}

unsigned ConditionAST::firstToken() const

{

    if (type_specifier_list)

        return type_specifier_list->firstToken();

    return declarator->firstToken();

}

unsigned ConditionAST::lastToken() const

{

    if (declarator)

        return declarator->lastToken();

    else if (type_specifier_list)

        return type_specifier_list->lastToken();

    // ### assert?

    return 0;

}

unsigned ConditionalExpressionAST::firstToken() const

{

    return condition->firstToken();

}

unsigned ConditionalExpressionAST::lastToken() const

{

    if (right_expression)

        return right_expression->lastToken();

    else if (colon_token)

        return colon_token + 1;

    else if (left_expression)

        return left_expression->lastToken();

    else if (question_token)

        return question_token + 1;

    else if (condition)