1Stdlib.Parsing(3)                OCaml library               Stdlib.Parsing(3)
2
3
4

NAME

6       Stdlib.Parsing - no description
7

Module

9       Module   Stdlib.Parsing
10

Documentation

12       Module Parsing
13        : (module Stdlib__parsing)
14
15
16
17
18
19
20
21
22       val symbol_start : unit -> int
23
24
25       symbol_start and Parsing.symbol_end are to be called in the action part
26       of a grammar rule only. They return  the  offset  of  the  string  that
27       matches the left-hand side of the rule: symbol_start() returns the off‐
28       set of the first character; symbol_end() returns the offset  after  the
29       last character. The first character in a file is at offset 0.
30
31
32
33       val symbol_end : unit -> int
34
35       See Parsing.symbol_start .
36
37
38
39       val rhs_start : int -> int
40
41       Same  as  Parsing.symbol_start  and Parsing.symbol_end , but return the
42       offset of the string matching the n th item on the right-hand  side  of
43       the  rule,  where n is the integer parameter to rhs_start and rhs_end .
44       n is 1 for the leftmost item.
45
46
47
48       val rhs_end : int -> int
49
50       See Parsing.rhs_start .
51
52
53
54       val symbol_start_pos : unit -> Lexing.position
55
56       Same as symbol_start , but return a position instead of an offset.
57
58
59
60       val symbol_end_pos : unit -> Lexing.position
61
62       Same as symbol_end , but return a position instead of an offset.
63
64
65
66       val rhs_start_pos : int -> Lexing.position
67
68       Same as rhs_start , but return a position instead of an offset.
69
70
71
72       val rhs_end_pos : int -> Lexing.position
73
74       Same as rhs_end , but return a position instead of an offset.
75
76
77
78       val clear_parser : unit -> unit
79
80       Empty the parser stack. Call it  just  after  a  parsing  function  has
81       returned,  to  remove  all pointers from the parser stack to structures
82       that were built by semantic actions during parsing.  This is  optional,
83       but lowers the memory requirements of the programs.
84
85
86
87       exception Parse_error
88
89
90       Raised  when  a  parser  encounters a syntax error.  Can also be raised
91       from the action part of a grammar rule, to initiate error recovery.
92
93
94
95       val set_trace : bool -> bool
96
97       Control debugging support  for  ocamlyacc  -generated  parsers.   After
98       Parsing.set_trace  true  ,  the  pushdown  automaton  that executes the
99       parsers prints a trace of its actions  (reading  a  token,  shifting  a
100       state, reducing by a rule) on standard output.  Parsing.set_trace false
101       turns this debugging trace off.  The boolean returned is  the  previous
102       state of the trace flag.
103
104
105       Since 3.11.0
106
107
108
109
110
111OCamldoc                          2020-02-27                 Stdlib.Parsing(3)