yyFlexLexer Class Reference

Inheritance diagram for yyFlexLexer:

Public Member Functions
struct yy_buffer_state *	yy_create_buffer (FLEX_STD istream *s, int size)
	Allocate and initialize an input buffer state.
void	yy_delete_buffer (struct yy_buffer_state *b)
	Destroy the buffer.
void	yy_switch_to_buffer (struct yy_buffer_state *new_buffer)
	Switch to a different input buffer.
void	yypop_buffer_state ()
	Removes and deletes the top of the stack, if present.
void	yypush_buffer_state (struct yy_buffer_state *new_buffer)
	Pushes the new state onto the stack.
void	yyrestart (FLEX_STD istream *s)
	Immediately switch to a different input stream.

Protected Member Functions
void	yy_flush_buffer (struct yy_buffer_state *b)
	Discard all buffered characters.

Protected Attributes
struct yy_buffer_state **	yy_buffer_stack
	Stack as an array.
size_t	yy_buffer_stack_max
	capacity of stack.
size_t	yy_buffer_stack_top
	index of top of stack.

Member Function Documentation

yy_create_buffer()

YY_BUFFER_STATE yyFlexLexer::yy_create_buffer ( FLEX_STD istream * s, int size )

virtual

Allocate and initialize an input buffer state.

Parameters

file	A readable stream.
size	The character buffer size in bytes. When in doubt, use YY_BUF_SIZE.

Returns

the allocated buffer state.

Implements FlexLexer.

References yy_create_buffer().

Referenced by yy_create_buffer(), and yyrestart().

yy_delete_buffer()

void yyFlexLexer::yy_delete_buffer ( struct yy_buffer_state * b )

virtual

Destroy the buffer.

Parameters

b	a buffer created with yy_create_buffer()

Implements FlexLexer.

References yy_delete_buffer().

Referenced by yy_delete_buffer(), and yypop_buffer_state().

yy_flush_buffer()

void yyFlexLexer::yy_flush_buffer ( struct yy_buffer_state * b )

protected

Discard all buffered characters.

On the next scan, YY_INPUT will be called.

Parameters

b	the buffer state to be flushed, usually YY_CURRENT_BUFFER.

References yy_flush_buffer().

Referenced by yy_flush_buffer().

yy_switch_to_buffer()

void yyFlexLexer::yy_switch_to_buffer ( struct yy_buffer_state * new_buffer )

virtual

Switch to a different input buffer.

Parameters

new_buffer

The new input buffer.

Implements FlexLexer.

References yy_switch_to_buffer().

Referenced by yy_switch_to_buffer().

yypop_buffer_state()

void yyFlexLexer::yypop_buffer_state

(

void

)

Removes and deletes the top of the stack, if present.

The next element becomes the new top.

References yy_buffer_stack_top, yy_delete_buffer(), and yypop_buffer_state().

Referenced by yypop_buffer_state().

yypush_buffer_state()

void yyFlexLexer::yypush_buffer_state

(

struct yy_buffer_state *

new_buffer

)

Pushes the new state onto the stack.

The new state becomes the current state. This function will allocate the stack if necessary.

Parameters

new_buffer

The new state.

References yy_buffer_stack_top, and yypush_buffer_state().

Referenced by yypush_buffer_state().

yyrestart()

void yyFlexLexer::yyrestart ( FLEX_STD istream * s )

virtual

Immediately switch to a different input stream.

Parameters

input_file

A readable stream.

Note

This function does not reset the start condition to INITIAL .

Implements FlexLexer.

References yy_create_buffer(), and yyrestart().

Referenced by yyrestart().