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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"
61 #include "gromacs/utility/stringutil.h"
65 #include "scanner_internal.h"
67 // This macro makes the actions a bit shorter, since nearly every action needs
69 #define ADD_TOKEN _gmx_sel_lexer_add_token(yylloc, yytext, yyleng, state)
71 // Set YY_BREAK to an empty value to avoid warnings (for the PGI compiler)
72 // when we have return statements followed by break. Instead, we add breaks
79 FRAC (([[:digit:]]*"."{DSEQ})|{DSEQ}".")
81 REAL (({FRAC}{EXP}?)|({DSEQ}{EXP}))
82 STRING (\"([^\"\\\n]|(\\\"))*\")
83 IDENTIFIER ([[:alpha:]][_[:alnum:]]*)
84 CMPOP (([<>]=?)|([!=]=))
90 %option prefix="_gmx_sel_yy"
91 %option header-file="scanner_flex.h"
93 %option never-interactive
102 gmx_sel_lexer_t *state = yyget_extra(yyscanner);
104 /* Return a token if one is pending */
105 retval = _gmx_sel_lexer_process_pending(yylval, yylloc, state);
110 /* Handle the start conditions for 'of' matching */
114 state->bMatchOf = false;
116 else if (state->bMatchBool)
119 state->bMatchBool = false;
121 else if (state->bCmdStart)
124 state->bCmdStart = false;
133 {INTEGER} { yylval->i = strtol(yytext, NULL, 10); ADD_TOKEN; return TOK_INT; }
134 {REAL} { yylval->r = strtod(yytext, NULL); ADD_TOKEN; return TOK_REAL; }
135 {STRING} { yylval->str = gmx_strndup(yytext+1, yyleng-2); ADD_TOKEN; return STR; }
137 \\\n { _gmx_sel_lexer_add_token(yylloc, " ", 1, state); break; }
139 if (yytext[0] == ';' || state->statusWriter != NULL)
141 state->pselstr = gmx::stripString(state->pselstr);
142 state->bCmdStart = true;
147 _gmx_sel_lexer_add_token(yylloc, " ", 1, state);
152 <cmdstart><<EOF>> { state->bCmdStart = true; yyterminate(); }
153 <<EOF>> { state->bCmdStart = true; return CMD_SEP; }
156 yes|on { ADD_TOKEN; yylval->i = 1; return TOK_INT; }
157 no|off { ADD_TOKEN; yylval->i = 0; return TOK_INT; }
159 group { ADD_TOKEN; return GROUP; }
160 to { ADD_TOKEN; return TO; }
161 <matchof>of { ADD_TOKEN; BEGIN(0); return OF; }
162 and|"&&" { ADD_TOKEN; return AND; }
163 or|"||" { ADD_TOKEN; return OR; }
164 xor { ADD_TOKEN; return XOR; }
165 not|"!" { ADD_TOKEN; return NOT; }
166 {CMPOP} { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return CMP_OP; }
168 {IDENTIFIER} { return _gmx_sel_lexer_process_identifier(yylval, yylloc, yytext, yyleng, state); }
170 [[:space:]]+ { _gmx_sel_lexer_add_token(yylloc, " ", 1, state); break; }
171 [_[:alnum:]]+ { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return STR; }
172 . { ADD_TOKEN; return yytext[0]; }