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35 /*! \cond \internal \file scanner.l
37 * Tokenizer for the selection language.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
40 * \ingroup module_selection
43 /*! \internal \file scanner.cpp
45 * Generated (from scanner.l by Flex) tokenizer for the selection language.
47 * \ingroup module_selection
50 #include "gromacs/legacyheaders/string2.h"
54 #include "scanner_internal.h"
56 /* This macro is here to make the actions a bit shorter, since nearly every
57 * action needs this call. */
58 #define ADD_TOKEN _gmx_sel_lexer_add_token(yytext, yyleng, state)
64 FRAC (([[:digit:]]*"."{DSEQ})|{DSEQ}".")
66 REAL (({FRAC}{EXP}?)|({DSEQ}{EXP}))
67 STRING (\"([^\"\\\n]|(\\\"))*\")
68 IDENTIFIER ([[:alpha:]][_[:alnum:]]*)
69 CMPOP (([<>]=?)|([!=]=))
75 %option prefix="_gmx_sel_yy"
76 %option header-file="scanner_flex.h"
78 %option never-interactive
88 gmx_sel_lexer_t *state = yyget_extra(yyscanner);
90 /* Return a token if one is pending */
91 retval = _gmx_sel_lexer_process_pending(yylval, state);
96 /* Handle the start conditions for 'of' matching */
100 state->bMatchOf = false;
102 else if (state->bMatchBool)
105 state->bMatchBool = false;
107 else if (state->bCmdStart)
110 state->bCmdStart = false;
112 else if (YYSTATE != help)
119 {INTEGER} { yylval->i = strtol(yytext, NULL, 10); ADD_TOKEN; return TOK_INT; }
120 {REAL} { yylval->r = strtod(yytext, NULL); ADD_TOKEN; return TOK_REAL; }
121 {STRING} { yylval->str = gmx_strndup(yytext+1, yyleng-2); ADD_TOKEN; return STR; }
123 \\\n { _gmx_sel_lexer_add_token(" ", 1, state); }
125 if (yytext[0] == ';' || state->bInteractive)
127 rtrim(state->pselstr);
128 state->bCmdStart = true;
133 _gmx_sel_lexer_add_token(" ", 1, state);
137 <cmdstart><<EOF>> { state->bCmdStart = true; yyterminate(); }
138 <<EOF>> { state->bCmdStart = true; return CMD_SEP; }
140 help { if (YYSTATE == cmdstart) { BEGIN(help); } return HELP; }
143 {IDENTIFIER} { yylval->str = gmx_strndup(yytext, yyleng); return HELP_TOPIC; }
144 ";"|\n { state->bCmdStart = true; return CMD_SEP; }
145 . { return INVALID; }
149 yes|on { ADD_TOKEN; yylval->i = 1; return TOK_INT; }
150 no|off { ADD_TOKEN; yylval->i = 0; return TOK_INT; }
152 group { ADD_TOKEN; return GROUP; }
153 to { ADD_TOKEN; return TO; }
154 <matchof>of { ADD_TOKEN; BEGIN(0); return OF; }
155 and|"&&" { ADD_TOKEN; return AND; }
156 or|"||" { ADD_TOKEN; return OR; }
157 xor { ADD_TOKEN; return XOR; }
158 not|"!" { ADD_TOKEN; return NOT; }
159 {CMPOP} { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return CMP_OP; }
161 {IDENTIFIER} { return _gmx_sel_lexer_process_identifier(yylval, yytext, yyleng, state); }
163 [[:blank:]]+ { _gmx_sel_lexer_add_token(" ", 1, state); }
164 [_[:alnum:]]+ { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return STR; }
165 . { ADD_TOKEN; return yytext[0]; }