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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 #if !defined _gmx_sel_yyIN_HEADER
54 // Required before flex definitions, since it includes <stdint.h>.
55 // Otherwise, compilers not strictly C99 get macro redefinition errors,
56 // since flex defines INT32_MAX etc. in such cases.
57 #include "gromacs/utility/basedefinitions.h"
60 #include "gromacs/utility/cstringutil.h"
64 #include "scanner_internal.h"
66 // This macro makes the actions a bit shorter, since nearly every action needs
68 #define ADD_TOKEN _gmx_sel_lexer_add_token(yylloc, yytext, yyleng, state)
70 // Set YY_BREAK to an empty value to avoid warnings (for the PGI compiler)
71 // when we have return statements followed by break. Instead, we add breaks
78 FRAC (([[:digit:]]*"."{DSEQ})|{DSEQ}".")
80 REAL (({FRAC}{EXP}?)|({DSEQ}{EXP}))
81 STRING (\"([^\"\\\n]|(\\\"))*\")
82 IDENTIFIER ([[:alpha:]][_[:alnum:]]*)
83 CMPOP (([<>]=?)|([!=]=))
89 %option prefix="_gmx_sel_yy"
90 %option header-file="scanner_flex.h"
92 %option never-interactive
101 gmx_sel_lexer_t *state = yyget_extra(yyscanner);
103 /* Return a token if one is pending */
104 retval = _gmx_sel_lexer_process_pending(yylval, yylloc, state);
109 /* Handle the start conditions for 'of' matching */
113 state->bMatchOf = false;
115 else if (state->bMatchBool)
118 state->bMatchBool = false;
120 else if (state->bCmdStart)
123 state->bCmdStart = false;
132 {INTEGER} { yylval->i = strtol(yytext, NULL, 10); ADD_TOKEN; return TOK_INT; }
133 {REAL} { yylval->r = strtod(yytext, NULL); ADD_TOKEN; return TOK_REAL; }
134 {STRING} { yylval->str = gmx_strndup(yytext+1, yyleng-2); ADD_TOKEN; return STR; }
136 \\\n { _gmx_sel_lexer_add_token(yylloc, " ", 1, state); break; }
138 if (yytext[0] == ';' || state->bInteractive)
140 rtrim(state->pselstr);
141 state->bCmdStart = true;
146 _gmx_sel_lexer_add_token(yylloc, " ", 1, state);
151 <cmdstart><<EOF>> { state->bCmdStart = true; yyterminate(); }
152 <<EOF>> { state->bCmdStart = true; return CMD_SEP; }
155 yes|on { ADD_TOKEN; yylval->i = 1; return TOK_INT; }
156 no|off { ADD_TOKEN; yylval->i = 0; return TOK_INT; }
158 group { ADD_TOKEN; return GROUP; }
159 to { ADD_TOKEN; return TO; }
160 <matchof>of { ADD_TOKEN; BEGIN(0); return OF; }
161 and|"&&" { ADD_TOKEN; return AND; }
162 or|"||" { ADD_TOKEN; return OR; }
163 xor { ADD_TOKEN; return XOR; }
164 not|"!" { ADD_TOKEN; return NOT; }
165 {CMPOP} { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return CMP_OP; }
167 {IDENTIFIER} { return _gmx_sel_lexer_process_identifier(yylval, yylloc, yytext, yyleng, state); }
169 [[:space:]]+ { _gmx_sel_lexer_add_token(yylloc, " ", 1, state); break; }
170 [_[:alnum:]]+ { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return STR; }
171 . { ADD_TOKEN; return yytext[0]; }