Class yyFlexLexer

class yyFlexLexer : public FlexLexer

Subclassed by SQLLexer, SQLLexer

Public Functions

yyFlexLexer(std::istream &arg_yyin, std::ostream &arg_yyout)
yyFlexLexer(std::istream *arg_yyin = 0, std::ostream *arg_yyout = 0)
~yyFlexLexer()
void yy_switch_to_buffer(yy_buffer_state *new_buffer)

Switch to a different input buffer.

Parameters

  • new_buffer: The new input buffer.

YY_BUFFER_STATE yy_create_buffer(std::istream *s, int size)

Delegate creation of buffers to the new version that takes an istream reference.

Return

the allocated buffer state.

Parameters

  • file: A readable stream.

  • size: The character buffer size in bytes. When in doubt, use YY_BUF_SIZE.

YY_BUFFER_STATE yy_create_buffer(std::istream &s, int size)

Allocate and initialize an input buffer state.

Return

the allocated buffer state.

Parameters

  • file: A readable stream.

  • size: The character buffer size in bytes. When in doubt, use YY_BUF_SIZE.

void yy_delete_buffer(yy_buffer_state *b)

Destroy the buffer.

Parameters

void yyrestart(std::istream *s)

Delegate to the new version that takes an istream reference.

Note

This function does not reset the start condition to INITIAL .

Parameters

  • input_file: A readable stream.

void yyrestart(std::istream &s)

Immediately switch to a different input stream.

Note

This function does not reset the start condition to INITIAL .

Parameters

  • input_file: A readable stream.

void yypush_buffer_state(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.

void yypop_buffer_state()

Removes and deletes the top of the stack, if present. The next element becomes the new top.

virtual int yylex()
void switch_streams(std::istream &new_in, std::ostream &new_out)
void switch_streams(std::istream *new_in = 0, std::ostream *new_out = 0)
int yywrap()

Protected Functions

int LexerInput(char *buf, int max_size)
void LexerOutput(const char *buf, int size)
void LexerError(const char *msg)
void yyunput(int c, char *buf_ptr)
int yyinput()
void yy_load_buffer_state()
void yy_init_buffer(yy_buffer_state *b, std::istream &s)
void yy_flush_buffer(yy_buffer_state *b)

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.

void yy_push_state(int new_state)
void yy_pop_state()
int yy_top_state()
yy_state_type yy_get_previous_state()
yy_state_type yy_try_NUL_trans(yy_state_type current_state)
int yy_get_next_buffer()
void yyensure_buffer_stack(void)

Protected Attributes

int yy_start_stack_ptr
int yy_start_stack_depth
int *yy_start_stack
std::istream yyin
std::ostream yyout
char yy_hold_char
int yy_n_chars
char *yy_c_buf_p
int yy_init
int yy_start
int yy_did_buffer_switch_on_eof
size_t yy_buffer_stack_top

index of top of stack.

size_t yy_buffer_stack_max

capacity of stack.

yy_buffer_state **yy_buffer_stack

Stack as an array.

yy_state_type yy_last_accepting_state
char *yy_last_accepting_cpos
yy_state_type *yy_state_buf
yy_state_type *yy_state_ptr
char *yy_full_match
int *yy_full_state
int yy_full_lp
int yy_lp
int yy_looking_for_trail_begin
int yy_more_flag
int yy_more_len
int yy_more_offset
int yy_prev_more_offset

Private Functions

void ctor_common()