re2c::Scanner Class Reference

#include <scanner.h>

Inheritance diagram for re2c::Scanner:

Collaboration diagram for re2c::Scanner:

Public Types
enum	ParseMode { Stop, Parse, Reuse, Rules }

Public Member Functions
	Scanner (Input &, OutputFile &)
	~Scanner ()
ParseMode	echo ()
int	scan ()
void	reuse ()
void	save_state (ScannerState &) const
void	restore_state (const ScannerState &)
uint32_t	get_cline () const
uint32_t	get_line () const
const std::string &	get_fname () const
void	set_in_parse (bool new_in_parse)
void	fatal_at (uint32_t line, ptrdiff_t ofs, const char *msg) const
void	fatalf_at (uint32_t line, const char *,...) const RE2C_GXX_ATTRIBUTE((format(printf
void void	fatalf (const char *,...) const RE2C_GXX_ATTRIBUTE((format(printf
void void void	fatal (const char *) const
void	fatal (ptrdiff_t, const char *) const
RegExp *	mkDiff (RegExp *e1, RegExp *e2) const
RegExp *	mkDot () const
RegExp *	mkDefault () const
	FORBID_COPY (Scanner)

Public Attributes
OutputFile &	out

Detailed Description

Definition at line 52 of file scanner.h.

Member Enumeration Documentation

enum re2c::Scanner::ParseMode

Enumerator
Stop
Parse
Reuse
Rules

Definition at line 83 of file scanner.h.

                   {
        Stop,
        Parse,
        Reuse,
        Rules
    };

Constructor & Destructor Documentation

re2c::Scanner::Scanner	(	Input &	i,
		OutputFile &	o
	)

Definition at line 65 of file scanner.cc.

    : ScannerState ()
    , in (i)
    , out (o)
{}

re2c::Scanner::~Scanner

(

)

Definition at line 175 of file scanner.cc.

{
    delete [] bot;
}

Member Function Documentation

ParseMode re2c::Scanner::echo

(

)

void re2c::Scanner::fatal ( const char *  msg ) const

inline

Definition at line 140 of file scanner.h.

{
    fatal(0, msg);
}

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void re2c::Scanner::fatal	(	ptrdiff_t	ofs,
		const char *	msg
	)		const

Definition at line 140 of file scanner.cc.

{
    fatal_at(in_parse ? tline : cline, ofs, msg);
}

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void re2c::Scanner::fatal_at	(	uint32_t	line,
		ptrdiff_t	ofs,
		const char *	msg
	)		const

Definition at line 132 of file scanner.cc.

{
    std::cerr << "re2c: error: "
        << "line " << line << ", column " << (tchar + ofs + 1) << ": "
        << msg << std::endl;
    exit(1);
}

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void re2c::Scanner::fatalf	(	const char *	fmt,
			...
	)		const

Definition at line 160 of file scanner.cc.

{
    char szBuf[4096];

    va_list args;
    
    va_start(args, fmt);
    vsnprintf(szBuf, sizeof(szBuf), fmt, args);
    va_end(args);
    
    szBuf[sizeof(szBuf)-1] = '0';
    
    fatal(szBuf);
}

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void re2c::Scanner::fatalf_at	(	uint32_t	line,
		const char *	fmt,
			...
	)		const

Definition at line 145 of file scanner.cc.

{
    char szBuf[4096];

    va_list args;
    
    va_start(args, fmt);
    vsnprintf(szBuf, sizeof(szBuf), fmt, args);
    va_end(args);
    
    szBuf[sizeof(szBuf)-1] = '0';
    
    fatal_at(line, 0, szBuf);
}

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re2c::Scanner::FORBID_COPY

(

Scanner

)

uint32_t re2c::Scanner::get_cline ( ) const

inline

Definition at line 125 of file scanner.h.

{
    return cline;
}

const std::string & re2c::Scanner::get_fname ( ) const

inline

Definition at line 120 of file scanner.h.

{
    return in.file_name;
}

uint32_t re2c::Scanner::get_line ( ) const

inline

Definition at line 130 of file scanner.h.

{
    return in_parse ? tline : cline;
}

RegExp * re2c::Scanner::mkDefault

(

)

const

Definition at line 195 of file regexp.cc.

{
    Range * def = Range::ran (0, opts->encoding.nCodeUnits());
    return new MatchOp(def);
}

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RegExp * re2c::Scanner::mkDiff	(	RegExp *	e1,
		RegExp *	e2
	)		const

Definition at line 160 of file regexp.cc.

{
    MatchOp * m1 = dynamic_cast<MatchOp *> (e1);
    MatchOp * m2 = dynamic_cast<MatchOp *> (e2);
    if (m1 == NULL || m2 == NULL)
    {
        fatal("can only difference char sets");
    }
    Range * r = Range::sub (m1->match, m2->match);

    return cls(r);
}

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RegExp * re2c::Scanner::mkDot

(

)

const

Definition at line 173 of file regexp.cc.

{
    Range * full = opts->encoding.fullRange();
    uint32_t c = '\n';
    if (!opts->encoding.encode(c))
        fatalf("Bad code point: '0x%X'", c);
    Range * ran = Range::sym (c);
    Range * inv = Range::sub (full, ran);

    return cls(inv);
}

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void re2c::Scanner::restore_state

(

const ScannerState &

state

)

Definition at line 189 of file scanner.cc.

{
    ptrdiff_t diff = bot - state.bot;
    char *old_bot = bot;
    char *old_lim = lim;
    char *old_top = top;
    char *old_eof = eof;
    *(ScannerState*)this = state;
    if (diff)
    {
        tok -= diff;
        ptr -= diff;
        cur -= diff;
        pos -= diff;
        ctx -= diff;        
        bot = old_bot;
        lim = old_lim;
        top = old_top;
        eof = old_eof;
    }
}

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void re2c::Scanner::reuse

(

)

Definition at line 180 of file scanner.cc.

{
    out.label_counter.reset ();
    last_fill_index = 0;
    bWroteGetState = false;
    bWroteCondCheck = false;
    opts.reset_mapCodeName ();
}

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void re2c::Scanner::save_state ( ScannerState &  state ) const

inline

Definition at line 135 of file scanner.h.

{
    state = *this;
}

int re2c::Scanner::scan

(

)

void re2c::Scanner::set_in_parse

(

bool

new_in_parse

)

Definition at line 127 of file scanner.cc.

{
    in_parse = new_in_parse;
}

Member Data Documentation

OutputFile& re2c::Scanner::out

Definition at line 58 of file scanner.h.

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

• parse/scanner.h
• ir/regexp/regexp.cc
• parse/scanner.cc