Made class possymbol for positive symbols and documented it.

[ginac.git] / ginac / symbol.cpp

diff --git a/ginac/symbol.cpp b/ginac/symbol.cpp
index 59dda652a133f3e71b0c0930696beb41139947d1..bf58fd4bacf6bc2833d763af347ec8c9ca2cf839 100644 (file)
--- a/ginac/symbol.cpp
+++ b/ginac/symbol.cpp
@@ -57,6 +57,13 @@ realsymbol::realsymbol()
        domain = domain::real;
 }
 
+// possymbol
+
+possymbol::possymbol()
+{
+       domain = domain::positive;
+}
+
 //////////
 // other constructors
 //////////
@@ -103,6 +110,20 @@ realsymbol::realsymbol(const std::string & initname, unsigned rt, tinfo_t rtt, u
 realsymbol::realsymbol(const std::string & initname, const std::string & texname, unsigned rt, tinfo_t rtt, unsigned domain)
  : symbol(initname, texname, rt, rtt, domain) { }
 
+// possymbol
+       
+possymbol::possymbol(const std::string & initname, unsigned domain)
+ : symbol(initname, domain) { }
+
+possymbol::possymbol(const std::string & initname, const std::string & texname, unsigned domain)
+ : symbol(initname, texname, domain) { }
+
+possymbol::possymbol(const std::string & initname, unsigned rt, tinfo_t rtt, unsigned domain)
+ : symbol(initname, rt, rtt, domain) { }
+
+possymbol::possymbol(const std::string & initname, const std::string & texname, unsigned rt, tinfo_t rtt, unsigned domain)
+ : symbol(initname, texname, rt, rtt, domain) { }
+
 //////////
 // archiving
 //////////
@@ -196,7 +217,9 @@ bool symbol::info(unsigned inf) const
            inf == info_flags::rational_function)
                return true;
        if (inf == info_flags::real)
-               return domain == domain::real;
+               return domain==domain::real || domain==domain::positive;
+       if (inf == info_flags::nonnegative)
+               return domain == domain::positive;
        else
                return inherited::info(inf);
 }
@@ -228,14 +251,14 @@ ex symbol::conjugate() const
 
 ex symbol::real_part() const
 {
-       if (domain == domain::real)
+       if (domain==domain::real || domain==domain::positive)
                return *this;
        return real_part_function(*this).hold();
 }
 
 ex symbol::imag_part() const
 {
-       if (domain == domain::real)
+       if (domain==domain::real || domain==domain::positive)
                return 0;
        return imag_part_function(*this).hold();
 }