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37 * Parser/scanner interaction functions.
39 * This is an implementation header: there should be no need to use it outside
42 * \author Teemu Murtola <teemu.murtola@gmail.com>
43 * \ingroup module_selection
45 #ifndef SELECTION_SCANNER_H
46 #define SELECTION_SCANNER_H
58 struct gmx_ana_indexgrps_t;
59 struct gmx_ana_selcollection_t;
61 #ifndef YY_TYPEDEF_YY_SCANNER_T
62 # define YY_TYPEDEF_YY_SCANNER_T
63 typedef void* yyscan_t;
66 /** Initializes the selection scanner. */
67 void _gmx_sel_init_lexer(yyscan_t* scannerp,
68 struct gmx_ana_selcollection_t* sc,
69 gmx::TextWriter* statusWriter,
72 struct gmx_ana_indexgrps_t* grps);
73 /** Frees memory allocated for the selection scanner. */
74 void _gmx_sel_free_lexer(yyscan_t scanner);
75 /** Stores an exception that is caught during parsing. */
76 void _gmx_sel_lexer_set_exception(yyscan_t scanner, const std::exception_ptr& ex);
77 /** Rethrows and clears the stored exception if one is present. */
78 // TODO: The semantics is a bit confusing, need to be thought more,
79 // but easier to do as part of larger refactoring of the parsing.
80 void _gmx_sel_lexer_rethrow_exception_if_occurred(yyscan_t scanner);
82 /** Returns writer for status output (if not NULL, the scanner is interactive). */
83 gmx::TextWriter* _gmx_sel_lexer_get_status_writer(yyscan_t scanner);
84 /** Returns the selection collection for the scanner. */
85 struct gmx_ana_selcollection_t* _gmx_sel_lexer_selcollection(yyscan_t scanner);
86 /** Returns true if the external index groups for the scanner are set. */
87 bool _gmx_sel_lexer_has_groups_set(yyscan_t scanner);
88 /** Returns the external index groups for the scanner. */
89 struct gmx_ana_indexgrps_t* _gmx_sel_lexer_indexgrps(yyscan_t scanner);
90 /** Returns the number of selections after which the parser should stop. */
91 int _gmx_sel_lexer_exp_selcount(yyscan_t scanner);
93 /** Returns a pretty string of the current selection. */
94 const char* _gmx_sel_lexer_pselstr(yyscan_t scanner);
96 * Sets the current parser context location.
98 * This location is set while Bison reductions are being processed, and
99 * identifies the location of the current rule/reduction.
101 void _gmx_sel_lexer_set_current_location(yyscan_t scanner, const gmx::SelectionLocation& location);
103 * Returns the current parser context location.
105 * This returns the location last set with
106 * _gmx_sel_lexer_set_current_location().
108 const gmx::SelectionLocation& _gmx_sel_lexer_get_current_location(yyscan_t scanner);
110 * Returns the selection text for the current parser context.
112 * This returns the selection text that corresponds to the position set last
113 * with _gmx_sel_lexer_set_current_location().
115 std::string _gmx_sel_lexer_get_current_text(yyscan_t scanner);
117 * Returns the selection text at the given location.
119 std::string _gmx_sel_lexer_get_text(yyscan_t scanner, const gmx::SelectionLocation& location);
120 /** Clears the current selection string. */
121 void _gmx_sel_lexer_clear_pselstr(yyscan_t scanner);
122 /** Clears the method stack in the scanner in error situations. */
123 void _gmx_sel_lexer_clear_method_stack(yyscan_t scanner);
124 /** Notifies the scanner that a complete method expression has been parsed. */
125 void _gmx_sel_finish_method(yyscan_t scanner);
126 /** Initializes the scanner to scan a file. */
127 void _gmx_sel_set_lex_input_file(yyscan_t scanner, FILE* fp);
128 /** Initializes the scanner to scan a string. */
129 void _gmx_sel_set_lex_input_str(yyscan_t scanner, const char* str);
131 /** The scanning function generated by Flex. */
132 #define YY_DECL int _gmx_sel_yylex(YYSTYPE* yylval, YYLTYPE* yylloc, yyscan_t yyscanner)