1 files changed, 62 insertions, 0 deletions

diff --git a/src/c++filt/c++filt.l b/src/c++filt/c++filt.l
new file mode 100644
index 0000000..af12cac
--- /dev/null
+++ b/src/c++filt/c++filt.l
@@ -0,0 +1,62 @@
+%{
+# include <string>
+
+int nBC = 0;
+%}
+
+%s hasT
+%x inWith
+%x inT
+%option noyywrap nounput batch
+
+%%
+
+"operator<<"                                            { ECHO; }
+"operator>>"                                            { ECHO; }
+"operator".                                                     { ECHO; }
+
+"<<"                                                            { ECHO; }
+">>"                                                            { ECHO; }
+" <<"                                                           { ECHO; }
+" >>"                                                           { ECHO; }
+
+"<anonymous>"                                           { ECHO; }
+
+\n+                                                                     {
+        BEGIN( INITIAL );
+        nBC = false;
+        ECHO;
+}
+
+" <"                                                            { ECHO; }
+
+"<"                                                                     {
+        BEGIN( inT );
+        printf("<...>");
+        nBC++;
+}
+
+<inT>"<"                                                        {
+        nBC++;
+
+}
+<inT>[^<>]*                                                     { }
+<inT>">"                                                        {
+        nBC--;
+        if( nBC == 0 )
+                BEGIN( hasT );
+}
+
+<hasT>" [with"[^\]]*"]"                                 { }
+
+%%
+
+int main()
+{
+        yyin = stdin;
+
+        yylex();
+
+        return 0;
+}
+