ASTNode Class Reference

#include <argsparser.h>

Inheritance diagram for ASTNode:

Collaboration diagram for ASTNode:

Public Member Functions
	ASTNode (ArgLexer *lexer=NULL, ASTNode *parent=NULL)
virtual	~ASTNode ()
virtual bool	parse ()=0
virtual void	check (std::stringstream &errors)=0
virtual bool	consume (ArgTokenType type)
ArgTokenType	lookahead () const
bool	lookahead (ArgTokenType type) const
ArgToken *	currentToken () const
void	nextToken ()
bool	parseCommentList (CommentList &comments)
void	error (String msg)
void	unexpectedToken (String msg="")

Public Attributes
ASTNode *	parent
ArgLexer *	pLexer
ArgToken	token
String	name
int	visible

Detailed Description

Following classes represent the Abstract Syntax Tree for the language of definition of a program. Class representing the nodes of the tree. All nodes will have the parse method, which need a ArgLexer to ask for tokens. Also a 'consume' method to use the terminal symbols

Definition at line 140 of file argsparser.h.

Constructor & Destructor Documentation

ASTNode()

ASTNode::ASTNode	(	ArgLexer *	lexer = NULL,
		ASTNode *	parent = NULL
	)

Definition at line 349 of file argsparser.cpp.

{
    pLexer = lexer;
    visible = 0;
    this->parent = parent;
}

~ASTNode()

virtual ASTNode::~ASTNode ( )

inlinevirtual

Definition at line 144 of file argsparser.h.

    {
    }

Member Function Documentation

check()

virtual void ASTNode::check ( std::stringstream &  errors )

pure virtual

Implemented in ProgramDef, SectionDef, ParamDef, and ArgumentDef.

consume()

bool ASTNode::consume ( ArgTokenType  type )

virtual

Definition at line 376 of file argsparser.cpp.

{
    ArgTokenType t = lookahead();
    if (t != type)
        unexpectedToken();
    //Store consumed token
    if (currentToken() != NULL)
        token = *currentToken();
    else
        REPORT_ERROR(ERR_MEM_NULLPOINTER, "current token is null");

    //Ask for new token
    nextToken();
    return true;
}

currentToken()

ArgToken * ASTNode::currentToken

(

)

const

Definition at line 366 of file argsparser.cpp.

{
    return pLexer->currentToken();
}

error()

void ASTNode::error

(

String

msg

)

Definition at line 406 of file argsparser.cpp.

{
    std::cerr << ">>> ERROR: " << msg << std::endl << "    at line "
    << token.line + 1 << " column " << token.start + 1 << std::endl;
    exit(1);
}

lookahead() [1/2]

ArgTokenType ASTNode::lookahead

(

)

const

Definition at line 356 of file argsparser.cpp.

{
    return pLexer->lookahead();
}

lookahead() [2/2]

bool ASTNode::lookahead

(

ArgTokenType

type

)

const

Definition at line 361 of file argsparser.cpp.

{
    return pLexer->lookahead() == type;
}

nextToken()

void ASTNode::nextToken

(

)

Definition at line 371 of file argsparser.cpp.

{
    pLexer->nextToken();
}

parse()

virtual bool ASTNode::parse ( )

pure virtual

Implemented in ProgramDef, SectionDef, ParamDef, and ArgumentDef.

parseCommentList()

bool ASTNode::parseCommentList

(

CommentList &

comments

)

Definition at line 392 of file argsparser.cpp.

{
    comments.clear();
    //Comment List (CL)
    //CL -> comment  CL | e
    while (lookahead(TOK_COMM))
    {
        consume(TOK_COMM);
        comments.addComment(token.lexeme, token.visibility);
    }

    return true;
}

unexpectedToken()

void ASTNode::unexpectedToken

(

String

msg = ""

)

Definition at line 413 of file argsparser.cpp.

{
    token = *currentToken();
    error(formatString("Unexpected token '%s' (%s) \n %s",
                       token.lexeme.c_str(), ArgToken::typeString(token.type), msg.c_str()));

}

Member Data Documentation

name

String ASTNode::name

Definition at line 152 of file argsparser.h.

parent

ASTNode* ASTNode::parent

Definition at line 147 of file argsparser.h.

pLexer

ArgLexer* ASTNode::pLexer

Definition at line 150 of file argsparser.h.

token

ArgToken ASTNode::token

Definition at line 151 of file argsparser.h.

visible

int ASTNode::visible

Definition at line 153 of file argsparser.h.

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The documentation for this class was generated from the following files:

• xmippCore/core/argsparser.h
• xmippCore/core/argsparser.cpp