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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/utility/basedefinitions.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)
66 // Set YY_BREAK to an empty value to avoid warnings (for the PGI compiler)
67 // when we have return statements followed by break. Instead, we add breaks
74 FRAC (([[:digit:]]*"."{DSEQ})|{DSEQ}".")
76 REAL (({FRAC}{EXP}?)|({DSEQ}{EXP}))
77 STRING (\"([^\"\\\n]|(\\\"))*\")
78 IDENTIFIER ([[:alpha:]][_[:alnum:]]*)
79 CMPOP (([<>]=?)|([!=]=))
85 %option prefix="_gmx_sel_yy"
86 %option header-file="scanner_flex.h"
88 %option never-interactive
97 gmx_sel_lexer_t *state = yyget_extra(yyscanner);
99 /* Return a token if one is pending */
100 retval = _gmx_sel_lexer_process_pending(yylval, state);
105 /* Handle the start conditions for 'of' matching */
109 state->bMatchOf = false;
111 else if (state->bMatchBool)
114 state->bMatchBool = false;
116 else if (state->bCmdStart)
119 state->bCmdStart = false;
128 {INTEGER} { yylval->i = strtol(yytext, NULL, 10); ADD_TOKEN; return TOK_INT; }
129 {REAL} { yylval->r = strtod(yytext, NULL); ADD_TOKEN; return TOK_REAL; }
130 {STRING} { yylval->str = gmx_strndup(yytext+1, yyleng-2); ADD_TOKEN; return STR; }
132 \\\n { _gmx_sel_lexer_add_token(" ", 1, state); break; }
134 if (yytext[0] == ';' || state->bInteractive)
136 rtrim(state->pselstr);
137 state->bCmdStart = true;
142 _gmx_sel_lexer_add_token(" ", 1, state);
147 <cmdstart><<EOF>> { state->bCmdStart = true; yyterminate(); }
148 <<EOF>> { state->bCmdStart = true; return CMD_SEP; }
151 yes|on { ADD_TOKEN; yylval->i = 1; return TOK_INT; }
152 no|off { ADD_TOKEN; yylval->i = 0; return TOK_INT; }
154 group { ADD_TOKEN; return GROUP; }
155 to { ADD_TOKEN; return TO; }
156 <matchof>of { ADD_TOKEN; BEGIN(0); return OF; }
157 and|"&&" { ADD_TOKEN; return AND; }
158 or|"||" { ADD_TOKEN; return OR; }
159 xor { ADD_TOKEN; return XOR; }
160 not|"!" { ADD_TOKEN; return NOT; }
161 {CMPOP} { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return CMP_OP; }
163 {IDENTIFIER} { return _gmx_sel_lexer_process_identifier(yylval, yytext, yyleng, state); }
165 [[:space:]]+ { _gmx_sel_lexer_add_token(" ", 1, state); break; }
166 [_[:alnum:]]+ { yylval->str = gmx_strndup(yytext, yyleng); ADD_TOKEN; return STR; }
167 . { ADD_TOKEN; return yytext[0]; }