#include <parser.h>

Inheritance diagram for Pol::Bscript::Parser:

Public Member Functions
	Parser ()

virtual	~Parser ()

virtual int	getToken (CompilerContext &ctx, Token &token, Expression *expr=NULL)

int	IP (Expression &expr, char *s)

Parser &	operator= (const Parser &)

virtual int	parseToken (CompilerContext &ctx, Expression &expr, Token *token)=0

virtual int	peekToken (const CompilerContext &ctx, Token &token, Expression *expr=NULL)

virtual int	recognize (Token &tok, const char buf, const char *s)

virtual int	recognize_binary (Token &tok, const char buf, const char *s)

virtual bool	recognize_reserved_word (Token &tok, const char *buf)

virtual int	recognize_unary (Token &tok, const char *buf)

void	reinit (Expression &ex)

void	setQuiet (int x)

virtual int	tryBinaryOperator (Token &tok, CompilerContext &ctx)

virtual int	tryLiteral (Token &tok, CompilerContext &ctx)

virtual int	tryNumeric (Token &tok, CompilerContext &ctx)

virtual int	tryOperator (Token &tok, const char buf, const char s, Operator opList, int n_ops, char *opbuf)

virtual int	tryUnaryOperator (Token &tok, CompilerContext &ctx)

Static Public Member Functions
static void	write_words (std::ostream &os)

Public Attributes
char	buffer [51]

bool	contains_tabs

ParseError	err

char	ext_err [50]

int	quiet

Detailed Description

Definition at line 107 of file parser.h.

Constructor & Destructor Documentation

Pol::Bscript::Parser::Parser ( )

Definition at line 75 of file parser.cpp.

References buffer, ext_err, and Pol::Bscript::init_tables().

virtual Pol::Bscript::Parser::~Parser ( )

inlinevirtual

Definition at line 111 of file parser.h.

Member Function Documentation

int Pol::Bscript::Parser::getToken	(	CompilerContext &	ctx,
		Token &	tok,
		Expression *	expr = `NULL`
	)

virtual

Reads next token from given context

what is a token? a set of homogeneous characters a Label: begins with [A-Za-z_], followed by [A-Za-z0-9]

A character literal: begins with '"', ends with '"'. anything goes in between.

a Number: begins with [0-9] (note: not plus or minus, these get eaten as unary ops) can be either a float (stored as double), or a long. 0xABC is hex, which is read okay. So is 0.5e+17. I let strtod do most of the work. basically whichever of strtod or strtol can do more with it (endptr arg is greater on exit), that's what i decide that it is.

an operator: any collection of the operator characters [ ( ) * / + - < = > ,] not separated by whitespace, digits, or alphas note a collection of more than one is considered a SINGLE operator. So if you put 6*-7, *- is the operator. nasty I know, but what am I supposed to do? (Maximal munch, is what is actually done!)

Parameters

tok	Token&: The token to store the found literal into
ctx	CompilerContext&: The context to look into
expr	unused

Returns: 0 when no matching text is found, 1 on success, -1 on error (also sets err)

Reimplemented in Pol::Bscript::SmartParser.

Definition at line 1483 of file parser.cpp.

References Pol::Bscript::Token::dbg_filenum, Pol::Bscript::CompilerContext::dbg_filenum, Pol::Bscript::Token::dbg_linenum, err, Pol::Bscript::Token::id, INFO_PRINT, Pol::Bscript::CompilerContext::line, Pol::Bscript::Mod_Basic, Pol::Bscript::Token::module, Pol::Bscript::PERR_WAAH, recognize_reserved_word(), Pol::Bscript::RSV_COLON, Pol::Bscript::CompilerContext::s, Pol::Bscript::Token::setStr(), Pol::Bscript::CompilerContext::skipcomments(), Pol::Bscript::TOK_SEMICOLON, Pol::Bscript::Token::tokval(), tryBinaryOperator(), tryLiteral(), tryNumeric(), tryUnaryOperator(), Pol::Bscript::TYP_DELIMITER, Pol::Bscript::TYP_RESERVED, and Pol::Bscript::Token::type.

Referenced by Pol::Bscript::SmartParser::callingMethod(), Pol::Bscript::SmartParser::getArgs(), Pol::Bscript::Compiler::getStructMembers(), Pol::Bscript::SmartParser::getToken(), Pol::Bscript::SmartParser::IIP(), and peekToken().

int Pol::Bscript::Parser::IP	(	Expression &	expr,
		char *	s
	)

Parser& Pol::Bscript::Parser::operator= ( const Parser & )

inline

Definition at line 112 of file parser.h.

virtual int Pol::Bscript::Parser::parseToken	(	CompilerContext &	ctx,
		Expression &	expr,
		Token *	token
	)

pure virtual

Implemented in Pol::Bscript::SmartParser.

Referenced by Pol::Bscript::SmartParser::IIP().

int Pol::Bscript::Parser::peekToken	(	const CompilerContext &	ctx,
		Token &	token,
		Expression *	expr = `NULL`
	)

virtual

Reads next token from given context, but without modifying the context

See also: Parser::getToken( CompilerContext& ctx, Token& tok )

Definition at line 1562 of file parser.cpp.

References getToken().

int Pol::Bscript::Parser::recognize	(	Token &	tok,
		const char *	buf,
		const char **	s
	)

virtual

Definition at line 1382 of file parser.cpp.

References recognize_binary(), and recognize_unary().

int Pol::Bscript::Parser::recognize_binary	(	Token &	tok,
		const char *	buf,
		const char **	s
	)

virtual

Definition at line 1323 of file parser.cpp.

References Pol::Bscript::Token::id, Pol::Bscript::Operator::id, Pol::Bscript::Mod_Basic, Pol::Bscript::Token::module, Pol::Bscript::n_operators, Pol::Bscript::Operator::precedence, Pol::Bscript::Token::precedence, Pol::Bscript::Token::setStr(), Pol::Bscript::Token::type, and Pol::Bscript::Operator::type.

Referenced by recognize().

bool Pol::Bscript::Parser::recognize_reserved_word	(	Token &	tok,
		const char *	buf
	)

virtual

Definition at line 1390 of file parser.cpp.

References Pol::Bscript::Token::deprecated, Pol::Bscript::ReservedWord::deprecated, Pol::Bscript::Token::id, Pol::Bscript::ReservedWord::id, Pol::Bscript::Mod_Basic, Pol::Bscript::Token::module, Pol::Bscript::Token::precedence, Pol::Bscript::ReservedWord::precedence, Pol::Bscript::Token::setStr(), Pol::Bscript::TOK_IDENT, Pol::Bscript::Token::type, Pol::Bscript::ReservedWord::type, and Pol::Bscript::ReservedWord::word.

Referenced by getToken(), and write_words().

int Pol::Bscript::Parser::recognize_unary	(	Token &	tok,
		const char *	buf
	)

virtual

Definition at line 1363 of file parser.cpp.

References Pol::Bscript::Token::id, Pol::Bscript::Operator::id, Pol::Bscript::Mod_Basic, Pol::Bscript::Token::module, Pol::Bscript::n_unary, Pol::Bscript::Operator::precedence, Pol::Bscript::Token::precedence, Pol::Bscript::Token::setStr(), Pol::Bscript::Token::type, and Pol::Bscript::Operator::type.

Referenced by Pol::Bscript::SmartParser::IIP(), and recognize().

void Pol::Bscript::Parser::reinit ( Expression & ex )

Definition at line 1432 of file parser.cpp.

References Pol::Bscript::Expression::CA, err, ext_err, Pol::Bscript::PERR_NONE, and Pol::Bscript::Expression::TX.

Referenced by Pol::Bscript::SmartParser::IP(), and Pol::Bscript::Compiler::readexpr().

void Pol::Bscript::Parser::setQuiet ( int x )

inline

Definition at line 146 of file parser.h.

Referenced by Pol::ECompile::compile_file(), Pol::ECompile::compile_inc(), and Pol::Bscript::Compiler::Compiler().

int Pol::Bscript::Parser::tryBinaryOperator	(	Token &	tok,
		CompilerContext &	ctx
	)

virtual

Tries to read a binary operator from context

Parameters

tok	Token&: The token to store the found literal into
ctx	CompilerContext&: The context to look into

Returns: 0 when no matching text is found, 1 on success, -1 on error (also sets err)

Definition at line 1123 of file parser.cpp.

References Pol::Bscript::CompilerContext::s, and tryOperator().

Referenced by getToken().

int Pol::Bscript::Parser::tryLiteral	(	Token &	tok,
		CompilerContext &	ctx
	)

virtual

Tries to read a literal (string/variable name) from context

Parameters

tok	Token&: The token to store the found literal into
ctx	CompilerContext&: The context to look into

Returns: 0 when no matching text is found, 1 on success, -1 on error (also sets err)

Reimplemented in Pol::Bscript::SmartParser.

Definition at line 1215 of file parser.cpp.

References Pol::Bscript::Token::copyStr(), err, Pol::Bscript::Token::id, passert_always_r, Pol::Bscript::PERR_INVESCAPE, Pol::Bscript::PERR_UNTERMSTRING, Pol::Bscript::CompilerContext::s, Pol::Bscript::TOK_IDENT, Pol::Bscript::TOK_STRING, Pol::Bscript::TYP_OPERAND, and Pol::Bscript::Token::type.

Referenced by getToken(), and Pol::Bscript::SmartParser::tryLiteral().

int Pol::Bscript::Parser::tryNumeric	(	Token &	tok,
		CompilerContext &	ctx
	)

virtual

Tries to read a numeric value from context

Parameters

tok	Token&: The token to store the found literal into
ctx	CompilerContext&: The context to look into

Returns: 0 when no matching text is found, 1 on success, -1 on error (also sets err)

Definition at line 1157 of file parser.cpp.

References Pol::Bscript::Token::dval, Pol::Bscript::Token::id, Pol::Bscript::Token::lval, Pol::Bscript::CompilerContext::s, Pol::Bscript::TOK_DOUBLE, Pol::Bscript::TOK_LONG, Pol::Bscript::TYP_OPERAND, and Pol::Bscript::Token::type.

Referenced by getToken().

int Pol::Bscript::Parser::tryOperator	(	Token &	tok,
		const char *	t,
		const char **	s,
		Operator *	opList,
		int	n_ops,
		char *	opbuf
	)

virtual

Tries to read a an operator from context

Parameters

tok	Token&: The token to store the found literal into
opList	The list of possible operators to look for, as Operator[]
n_ops	Number of operators in the list
t	todo
s	todo
opbuf	todo