--- /dev/null
+%{
+/*
+ * filter-lexer.l
+ *
+ * LTTng filter lexer
+ *
+ * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <stdio.h>
+#include "filter-ast.h"
+#include "filter-parser.hpp"
+#include <lttng/lttng-export.h>
+%}
+
+%x comment_ml comment_sl string_lit char_const
+%option reentrant yylineno noyywrap bison-bridge noinput nounput
+%option extra-type="struct filter_parser_ctx *"
+ /* bison-locations */
+
+D [0-9]
+L [a-zA-Z_]
+H [a-fA-F0-9]
+E ([Ee][+-]?{D}+)
+P ([Pp][+-]?{D}+)
+FS (f|F|l|L)
+IS ((u|U)|(u|U)?(l|L|ll|LL)|(l|L|ll|LL)(u|U))
+
+INTEGER_SUFFIX [ \n\t]*(U|UL|ULL|LU|LLU|Ul|Ull|lU|llU|u|uL|uLL|Lu|LLu|ul|ull|lu|llu)
+DIGIT [0-9]
+NONDIGIT [a-zA-Z_]
+HEXDIGIT [0-9A-Fa-f]
+OCTALDIGIT [0-7]
+UCHARLOWERCASE \\u{HEXDIGIT}{4}
+UCHARUPPERCASE \\U{HEXDIGIT}{8}
+ID_EXTRA_CHAR (":")
+ID_NONDIGIT {NONDIGIT}|{UCHARLOWERCASE}|{UCHARUPPERCASE}|{ID_EXTRA_CHAR}
+IDENTIFIER {ID_NONDIGIT}({ID_NONDIGIT}|{DIGIT})*
+ESCSEQ \\(\'|\"|\?|\\|a|b|f|n|r|t|v|{OCTALDIGIT}{1,3}|u{HEXDIGIT}{4}|U{HEXDIGIT}{8}|x{HEXDIGIT}+)
+%%
+
+ /*
+ * Using start conditions to deal with comments
+ * and strings.
+ */
+
+"/*" BEGIN(comment_ml);
+<comment_ml>[^*\n]* /* eat anything that's not a '*' */
+<comment_ml>"*"+[^*/\n]* /* eat up '*'s not followed by '/'s */
+<comment_ml>\n ++yylineno;
+<comment_ml>"*"+"/" BEGIN(INITIAL);
+
+"//" BEGIN(comment_sl);
+<comment_sl>[^\n]*\n ++yylineno; BEGIN(INITIAL);
+
+L\' BEGIN(char_const); return CHARACTER_CONSTANT_START;
+\' BEGIN(char_const); return CHARACTER_CONSTANT_START;
+<char_const>\' BEGIN(INITIAL); return SQUOTE;
+
+L\" BEGIN(string_lit); return STRING_LITERAL_START;
+\" BEGIN(string_lit); return STRING_LITERAL_START;
+<string_lit>\" BEGIN(INITIAL); return DQUOTE;
+
+<char_const,string_lit>ESCSEQ return ESCSEQ;
+<char_const,string_lit>\n ; /* ignore */
+<char_const,string_lit>. setstring(yyextra, yylval, yytext); return CHAR_STRING_TOKEN;
+
+
+0[xX]{H}+{IS}? setstring(yyextra, yylval, yytext); return HEXADECIMAL_CONSTANT;
+0[0-7]*{IS}? setstring(yyextra, yylval, yytext); return OCTAL_CONSTANT;
+[1-9]{D}*{IS}? setstring(yyextra, yylval, yytext); return DECIMAL_CONSTANT;
+
+{D}+{E}{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
+{D}*"."{D}+{E}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
+{D}+"."{D}*{E}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
+0[xX]{H}+{P}{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
+0[xX]{H}*"."{H}+{P}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
+0[xX]{H}+"."{H}*{P}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
+
+"[" return LSBRAC;
+"]" return RSBRAC;
+"(" return LPAREN;
+")" return RPAREN;
+"{" return LBRAC;
+"}" return RBRAC;
+"->" return RARROW;
+
+"*" return STAR;
+"+" return PLUS;
+"-" return MINUS;
+
+"%" return MOD_OP;
+"/" return DIV_OP;
+">>" return RIGHT_OP;
+"<<" return LEFT_OP;
+
+"==" return EQ_OP;
+"!=" return NE_OP;
+"<=" return LE_OP;
+">=" return GE_OP;
+"<" return LT_OP;
+">" return GT_OP;
+"&&" return AND_OP;
+"||" return OR_OP;
+"!" return NOT_OP;
+
+":=" return ASSIGN;
+":" return COLON;
+";" return SEMICOLON;
+"..." return DOTDOTDOT;
+"." return DOT;
+"=" return EQUAL;
+"," return COMMA;
+"^" return XOR_BIN;
+"&" return AND_BIN;
+"|" return OR_BIN;
+"~" return NOT_BIN;
+"$"{IDENTIFIER} printf_debug("<GLOBAL_IDENTIFIER %s>\n", yytext); setstring(yyextra, yylval, yytext); return GLOBAL_IDENTIFIER;
+{IDENTIFIER} printf_debug("<IDENTIFIER %s>\n", yytext); setstring(yyextra, yylval, yytext); return IDENTIFIER;
+[ \t\n]+ ; /* ignore */
+. return ERROR;
+%%
+
+/*
+ * The lexer symbols were (e.g. lttng_yy_create_buffer) were mistakenly
+ * exported in the past, so must stay exported. Since it is difficult to tweak
+ * how the lexer functions are emitted, the strategy used here was to use a
+ * different prefix for the symbols (`lttng_filter_`) and define aliases with
+ * the old prefix (`lttng_`).
+ *
+ * The `MAKE_ALIAS` macro defines one such alias.
+ */
+LTTNG_EXPORT
+YY_BUFFER_STATE lttng_yy_create_buffer(FILE *file, int size, yyscan_t yyscanner);
+YY_BUFFER_STATE lttng_yy_create_buffer(FILE *file, int size, yyscan_t yyscanner)
+{
+ return yy_create_buffer(file, size, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yy_delete_buffer(YY_BUFFER_STATE b, yyscan_t yyscanner);
+void lttng_yy_delete_buffer(YY_BUFFER_STATE b, yyscan_t yyscanner)
+{
+ return yy_delete_buffer(b, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yy_flush_buffer (YY_BUFFER_STATE b, yyscan_t yyscanner);
+void lttng_yy_flush_buffer (YY_BUFFER_STATE b, yyscan_t yyscanner)
+{
+ return yy_flush_buffer(b, yyscanner);
+}
+
+LTTNG_EXPORT
+YY_BUFFER_STATE lttng_yy_scan_buffer(char *base, yy_size_t size, yyscan_t yyscanner);
+YY_BUFFER_STATE lttng_yy_scan_buffer(char *base, yy_size_t size, yyscan_t yyscanner)
+{
+ return yy_scan_buffer(base, size, yyscanner);
+}
+
+LTTNG_EXPORT
+YY_BUFFER_STATE lttng_yy_scan_bytes(const char *bytes, int len, yyscan_t yyscanner);
+YY_BUFFER_STATE lttng_yy_scan_bytes(const char *bytes, int len, yyscan_t yyscanner)
+{
+ return yy_scan_bytes(bytes, len, yyscanner);
+}
+
+LTTNG_EXPORT
+YY_BUFFER_STATE lttng_yy_scan_string(const char *yy_str, yyscan_t yyscanner);
+YY_BUFFER_STATE lttng_yy_scan_string(const char *yy_str, yyscan_t yyscanner)
+{
+ return yy_scan_string(yy_str, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yy_switch_to_buffer(YY_BUFFER_STATE new_buffer, yyscan_t yyscanner);
+void lttng_yy_switch_to_buffer(YY_BUFFER_STATE new_buffer, yyscan_t yyscanner)
+{
+ return yy_switch_to_buffer(new_buffer, yyscanner);
+}
+
+LTTNG_EXPORT
+void *lttng_yyalloc(yy_size_t s, yyscan_t yyscanner);
+void *lttng_yyalloc(yy_size_t s, yyscan_t yyscanner)
+{
+ return yyalloc(s, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yyfree(void *p, yyscan_t yyscanner);
+void lttng_yyfree(void *p, yyscan_t yyscanner)
+{
+ return yyfree(p, yyscanner);
+}
+
+LTTNG_EXPORT
+int lttng_yyget_column(yyscan_t yyscanner);
+int lttng_yyget_column(yyscan_t yyscanner)
+{
+ return yyget_column(yyscanner);
+}
+
+LTTNG_EXPORT
+int lttng_yyget_debug(yyscan_t yyscanner);
+int lttng_yyget_debug(yyscan_t yyscanner)
+{
+ return yyget_debug(yyscanner);
+}
+
+LTTNG_EXPORT
+YY_EXTRA_TYPE lttng_yyget_extra(yyscan_t yyscanner);
+YY_EXTRA_TYPE lttng_yyget_extra(yyscan_t yyscanner)
+{
+ return yyget_extra(yyscanner);
+}
+
+LTTNG_EXPORT
+FILE *lttng_yyget_in(yyscan_t yyscanner);
+FILE *lttng_yyget_in(yyscan_t yyscanner)
+{
+ return yyget_in(yyscanner);
+}
+
+LTTNG_EXPORT
+int lttng_yyget_leng(yyscan_t yyscanner);
+int lttng_yyget_leng(yyscan_t yyscanner)
+{
+ return yyget_leng(yyscanner);
+}
+
+LTTNG_EXPORT
+int lttng_yyget_lineno(yyscan_t yyscanner);
+int lttng_yyget_lineno(yyscan_t yyscanner)
+{
+ return yyget_lineno(yyscanner);
+}
+
+LTTNG_EXPORT
+YYSTYPE *lttng_yyget_lval(yyscan_t yyscanner);
+YYSTYPE *lttng_yyget_lval(yyscan_t yyscanner)
+{
+ return yyget_lval(yyscanner);
+}
+
+LTTNG_EXPORT
+FILE *lttng_yyget_out(yyscan_t yyscanner);
+FILE *lttng_yyget_out(yyscan_t yyscanner)
+{
+ return yyget_out(yyscanner);
+}
+
+LTTNG_EXPORT
+char *lttng_yyget_text(yyscan_t yyscanner);
+char *lttng_yyget_text(yyscan_t yyscanner)
+{
+ return yyget_text(yyscanner);
+}
+
+LTTNG_EXPORT
+int lttng_yylex_init(yyscan_t *scanner);
+int lttng_yylex_init(yyscan_t *scanner)
+{
+ return yylex_init(scanner);
+}
+
+LTTNG_EXPORT
+void lttng_yypop_buffer_state(yyscan_t yyscanner);
+void lttng_yypop_buffer_state(yyscan_t yyscanner)
+{
+ return yypop_buffer_state(yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yypush_buffer_state(YY_BUFFER_STATE new_buffer, yyscan_t yyscanner);
+void lttng_yypush_buffer_state(YY_BUFFER_STATE new_buffer, yyscan_t yyscanner)
+{
+ return yypush_buffer_state(new_buffer, yyscanner);
+}
+
+LTTNG_EXPORT
+void *lttng_yyrealloc(void *p, yy_size_t s, yyscan_t yyscanner);
+void *lttng_yyrealloc(void *p, yy_size_t s, yyscan_t yyscanner)
+{
+ return yyrealloc(p, s, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yyset_column(int _column_no, yyscan_t yyscanner);
+void lttng_yyset_column(int _column_no, yyscan_t yyscanner)
+{
+ return yyset_column(_column_no, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yyset_debug(int debug_flag, yyscan_t yyscanner);
+void lttng_yyset_debug(int debug_flag, yyscan_t yyscanner)
+{
+ return yyset_debug(debug_flag, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yyset_extra(YY_EXTRA_TYPE user_defined, yyscan_t yyscanner);
+void lttng_yyset_extra(YY_EXTRA_TYPE user_defined, yyscan_t yyscanner)
+{
+ return yyset_extra(user_defined, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yyset_in(FILE *_in_str, yyscan_t yyscanner);
+void lttng_yyset_in(FILE *_in_str, yyscan_t yyscanner)
+{
+ return yyset_in(_in_str, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yyset_lineno(int _line_number, yyscan_t yyscanner);
+void lttng_yyset_lineno(int _line_number, yyscan_t yyscanner)
+{
+ return yyset_lineno(_line_number, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yyset_lval(YYSTYPE *yylval_param, yyscan_t yyscanner);
+void lttng_yyset_lval(YYSTYPE *yylval_param, yyscan_t yyscanner)
+{
+ return yyset_lval(yylval_param, yyscanner);
+}
+
+LTTNG_EXPORT
+void lttng_yyset_out(FILE *_out_str, yyscan_t yyscanner);
+void lttng_yyset_out(FILE *_out_str, yyscan_t yyscanner)
+{
+ return yyset_out(_out_str, yyscanner);
+}