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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 // Required before flex definitions, since it includes <stdint.h>.
51 // Otherwise, compilers not strictly C99 get macro redefinition errors,
52 // since flex defines INT32_MAX etc. in such cases.
53 #include "gromacs/legacyheaders/types/simple.h"
56 #include "gromacs/utility/cstringutil.h"
60 #include "scanner_internal.h"
62 // This macro makes the actions a bit shorter, since nearly every action needs
64 #define ADD_TOKEN _gmx_sel_lexer_add_token(yytext, yyleng, state)
70 FRAC (([[:digit:]]*"."{DSEQ})|{DSEQ}".")
72 REAL (({FRAC}{EXP}?)|({DSEQ}{EXP}))
73 STRING (\"([^\"\\\n]|(\\\"))*\")
74 IDENTIFIER ([[:alpha:]][_[:alnum:]]*)
75 CMPOP (([<>]=?)|([!=]=))
81 %option prefix="_gmx_sel_yy"
82 %option header-file="scanner_flex.h"
84 %option never-interactive
93 gmx_sel_lexer_t *state = yyget_extra(yyscanner);
95 /* Return a token if one is pending */
96 retval = _gmx_sel_lexer_process_pending(yylval, state);
101 /* Handle the start conditions for 'of' matching */
105 state->bMatchOf = false;
107 else if (state->bMatchBool)
110 state->bMatchBool = false;
112 else if (state->bCmdStart)
115 state->bCmdStart = false;
124 {INTEGER} { yylval->i = strtol(yytext, NULL, 10); ADD_TOKEN; return TOK_INT; }
125 {REAL} { yylval->r = strtod(yytext, NULL); ADD_TOKEN; return TOK_REAL; }
126 {STRING} { yylval->str = gmx_strndup(yytext+1, yyleng-2); ADD_TOKEN; return STR; }
128 \\\n { _gmx_sel_lexer_add_token(" ", 1, state); }
130 if (yytext[0] == ';' || state->bInteractive)
132 rtrim(state->pselstr);
133 state->bCmdStart = true;
138 _gmx_sel_lexer_add_token(" ", 1, state);
142 <cmdstart><<EOF>> { state->bCmdStart = true; yyterminate(); }
143 <<EOF>> { state->bCmdStart = true; return CMD_SEP; }
146 yes|on { ADD_TOKEN; yylval->i = 1; return TOK_INT; }
147 no|off { ADD_TOKEN; yylval->i = 0; return TOK_INT; }
149 group { ADD_TOKEN; return GROUP; }
150 to { ADD_TOKEN; return TO; }
151 <matchof>of { ADD_TOKEN; BEGIN(0); return OF; }
152 and|"&&" { ADD_TOKEN; return AND; }
153 or|"||" { ADD_TOKEN; return OR; }
154 xor { ADD_TOKEN; return XOR; }
155 not|"!" { ADD_TOKEN; return NOT; }
156 {CMPOP} { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return CMP_OP; }
158 {IDENTIFIER} { return _gmx_sel_lexer_process_identifier(yylval, yytext, yyleng, state); }
160 [[:space:]]+ { _gmx_sel_lexer_add_token(" ", 1, state); }
161 [_[:alnum:]]+ { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return STR; }
162 . { ADD_TOKEN; return yytext[0]; }