- the ex stream >> operator is gone

[ginac.git] / ginac / input_lexer.h

diff --git a/ginac/input_lexer.h b/ginac/input_lexer.h
index 575c836c75c9bca76adbcccbf38446e0a3084ce9..e67ae9236e4fa4c1f460ae65df1da4e04e29a600 100644 (file)
--- a/ginac/input_lexer.h
+++ b/ginac/input_lexer.h
@@ -47,16 +47,19 @@ namespace GiNaC {
 
 class ex;
 
-/** Set the input string to be parsed by yyparse(). */
+/** Set the input string to be parsed by ginac_yyparse() (used internally). */
 extern void set_lexer_string(const string &s);
 
-/** Set the list of predefined symbols for the lexer (used internally for stream input). */
+/** Set the list of predefined symbols for the lexer (used internally). */
 extern void set_lexer_symbols(ex l);
 
-/** The expression parser function (used internally for stream input). */
-extern int yyparse();
+/** Check whether lexer symbol was predefined (vs. created by the lexer, e.g. function names). */
+extern bool is_lexer_symbol_predefined(const ex &s);
 
-/** The expression returned by the parser (used internally for stream input). */
+/** The expression parser function (used internally). */
+extern int ginac_yyparse();
+
+/** The expression returned by the parser (used internally). */
 extern ex parsed_ex;
 
 /** Get error message from the parser. */