MySQL  8.0.27
Source Code Documentation
parse_location.h
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22 
23 #ifndef PARSE_LOCATION_INCLUDED
24 #define PARSE_LOCATION_INCLUDED
25 
26 #include <cstdlib> // size_t
27 
28 /**
29  Helper class for the YYLTYPE
30 */
32  const char *start; // token start
33  const char *end; // the 1st byte after the token
34 
35  bool is_empty() const { return length() == 0; }
36  size_t length() const { return static_cast<size_t>(end - start); }
37 };
38 
39 /**
40  Bison "location" class
41 */
42 struct YYLTYPE {
43  Symbol_location cpp; // token location in the preprocessed buffer
44  Symbol_location raw; // token location in the raw buffer
45 
46  bool is_empty() const { return cpp.is_empty(); }
47 };
48 
49 /*
50  Note: YYLTYPE doesn't overload a default constructor (as well an underlying
51  Symbol_location).
52  OTOH if we need a zero-initialized POS, YYLTYPE or Symbol_location object,
53  we can simply call POS(), YYLTYPE() or Symbol_location(): C++ does
54  value-initialization in that case.
55 */
56 typedef YYLTYPE POS;
57 
58 #define YYLTYPE_IS_DECLARED 1 // signal Bison that we have our own YYLTYPE
59 
60 /**
61  Bison calls this macro:
62  1. each time a rule is matched and
63  2. to compute a syntax error location.
64 
65  @param [out] Current location of the whole matched rule
66  @param Rhs locations of all right hand side elements in the rule
67  @param N number of right hand side elements in the rule
68 */
69 #define YYLLOC_DEFAULT(Current, Rhs, N) \
70  do \
71  if (N) { \
72  (Current).cpp.start = YYRHSLOC(Rhs, 1).cpp.start; \
73  (Current).cpp.end = YYRHSLOC(Rhs, N).cpp.end; \
74  (Current).raw.start = YYRHSLOC(Rhs, 1).raw.start; \
75  (Current).raw.end = YYRHSLOC(Rhs, N).raw.end; \
76  } else { \
77  (Current).cpp.start = (Current).cpp.end = YYRHSLOC(Rhs, 0).cpp.end; \
78  (Current).raw.start = (Current).raw.end = YYRHSLOC(Rhs, 0).raw.end; \
79  } \
80  while (0)
81 
82 #endif /* PARSE_LOCATION_INCLUDED */
YYLTYPE POS
Definition: parse_location.h:56
Helper class for the YYLTYPE.
Definition: parse_location.h:31
bool is_empty() const
Definition: parse_location.h:35
const char * start
Definition: parse_location.h:32
const char * end
Definition: parse_location.h:33
size_t length() const
Definition: parse_location.h:36
Bison "location" class.
Definition: parse_location.h:42
Symbol_location raw
Definition: parse_location.h:44
Symbol_location cpp
Definition: parse_location.h:43
bool is_empty() const
Definition: parse_location.h:46