Stdlib.Parsing(3o) OCaml library Stdlib.Parsing(3o)
NAME
Stdlib.Parsing - no description
Module
Module Stdlib.Parsing
Documentation
Module Parsing
: (module Stdlib__Parsing)
val symbol_start : unit -> int
symbol_start and Parsing.symbol_end are to be called in the action part
of a grammar rule only. They return the offset of the string that
matches the left-hand side of the rule: symbol_start() returns the off-
set of the first character; symbol_end() returns the offset after the
last character. The first character in a file is at offset 0.
val symbol_end : unit -> int
See Parsing.symbol_start .
val rhs_start : int -> int
Same as Parsing.symbol_start and Parsing.symbol_end , but return the
offset of the string matching the n th item on the right-hand side of
the rule, where n is the integer parameter to rhs_start and rhs_end .
n is 1 for the leftmost item.
val rhs_end : int -> int
See Parsing.rhs_start .
val symbol_start_pos : unit -> Lexing.position
Same as symbol_start , but return a position instead of an offset.
val symbol_end_pos : unit -> Lexing.position
Same as symbol_end , but return a position instead of an offset.
val rhs_start_pos : int -> Lexing.position
Same as rhs_start , but return a position instead of an offset.
val rhs_end_pos : int -> Lexing.position
Same as rhs_end , but return a position instead of an offset.
val clear_parser : unit -> unit
Empty the parser stack. Call it just after a parsing function has re-
turned, to remove all pointers from the parser stack to structures that
were built by semantic actions during parsing. This is optional, but
lowers the memory requirements of the programs.
exception Parse_error
Raised when a parser encounters a syntax error. Can also be raised
from the action part of a grammar rule, to initiate error recovery.
val set_trace : bool -> bool
Control debugging support for ocamlyacc -generated parsers. After
Parsing.set_trace true , the pushdown automaton that executes the
parsers prints a trace of its actions (reading a token, shifting a
state, reducing by a rule) on standard output. Parsing.set_trace false
turns this debugging trace off. The boolean returned is the previous
state of the trace flag.
Since 3.11.0
OCamldoc 2023-02-12 Stdlib.Parsing(3o)
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