* Implementation of relations between expressions */
/*
- * GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include "utils.h"
#include "debugmsg.h"
-#ifndef NO_NAMESPACE_GINAC
namespace GiNaC {
-#endif // ndef NO_NAMESPACE_GINAC
GINAC_IMPLEMENT_REGISTERED_CLASS(relational, basic)
//////////
-// default constructor, destructor, copy constructor assignment operator and helpers
+// default ctor, dtor, copy ctor assignment operator and helpers
//////////
// public
relational::relational() : basic(TINFO_relational)
{
- debugmsg("relational default constructor",LOGLEVEL_CONSTRUCT);
-}
-
-relational::~relational()
-{
- debugmsg("relational destructor",LOGLEVEL_DESTRUCT);
- destroy(false);
-}
-
-relational::relational(const relational & other)
-{
- debugmsg("relational copy constructor",LOGLEVEL_CONSTRUCT);
- copy(other);
-}
-
-const relational & relational::operator=(const relational & other)
-{
- debugmsg("relational operator=",LOGLEVEL_ASSIGNMENT);
- if (this != &other) {
- destroy(true);
- copy(other);
- }
- return *this;
+ debugmsg("relational default ctor",LOGLEVEL_CONSTRUCT);
}
// protected
}
//////////
-// other constructors
+// other ctors
//////////
// public
relational::relational(const ex & lhs, const ex & rhs, operators oper) : basic(TINFO_relational)
{
- debugmsg("relational constructor ex,ex,operator",LOGLEVEL_CONSTRUCT);
+ debugmsg("relational ctor ex,ex,operator",LOGLEVEL_CONSTRUCT);
lh=lhs;
rh=rhs;
o=oper;
/** Construct object from archive_node. */
relational::relational(const archive_node &n, const lst &sym_lst) : inherited(n, sym_lst)
{
- debugmsg("relational constructor from archive_node", LOGLEVEL_CONSTRUCT);
+ debugmsg("relational ctor from archive_node", LOGLEVEL_CONSTRUCT);
unsigned int opi;
if (!(n.find_unsigned("op", opi)))
throw (std::runtime_error("unknown relational operator in archive"));
// public
-basic * relational::duplicate() const
-{
- debugmsg("relational duplicate",LOGLEVEL_DUPLICATE);
- return new relational(*this);
-}
-
void relational::print(std::ostream & os, unsigned upper_precedence) const
{
debugmsg("relational print",LOGLEVEL_PRINT);
void relational::printraw(std::ostream & os) const
{
debugmsg("relational printraw",LOGLEVEL_PRINT);
- os << "RELATIONAL(";
+ os << class_name() << "(";
lh.printraw(os);
os << ",";
rh.printraw(os);
ex relational::eval(int level) const
{
- if (level==1) {
+ if (level==1)
return this->hold();
- }
- if (level == -max_recursion_level) {
+
+ if (level == -max_recursion_level)
throw(std::runtime_error("max recursion level reached"));
- }
+
return (new relational(lh.eval(level-1),rh.eval(level-1),o))->setflag(status_flags::dynallocated | status_flags::evaluated);
}
ex relational::evalf(int level) const
{
- if (level==1) {
+ if (level==1)
return *this;
- }
- if (level == -max_recursion_level) {
+
+ if (level==-max_recursion_level)
throw(std::runtime_error("max recursion level reached"));
- }
+
return (new relational(lh.eval(level-1),rh.eval(level-1),o))->setflag(status_flags::dynallocated);
}
int cmpval;
if (o == oth.o) {
- cmpval=lh.compare(oth.lh);
- if (cmpval==0) {
+ cmpval = lh.compare(oth.lh);
+ if (cmpval==0)
return rh.compare(oth.rh);
- } else {
+ else
return cmpval;
- }
}
- if (o<oth.o) {
+ if (o<oth.o)
return -1;
- } else {
+ else
return 1;
- }
}
unsigned relational::return_type(void) const
// please note that (a<b) == false does not imply (a>=b) == true
// a false result means the comparison is either false or undecidable
// (except for !=, where true means unequal or undecidable)
- ex df=lh-rh;
- if (!is_ex_exactly_of_type(df,numeric)) {
- return o==not_equal ? true : false; // cannot decide on non-numerical results
- }
- int cmpval=ex_to_numeric(df).compare(_num0());
+ ex df = lh-rh;
+ if (!is_ex_exactly_of_type(df,numeric))
+ // cannot decide on non-numerical results
+ return o==not_equal ? true : false;
+
+ int cmpval = ex_to_numeric(df).compare(_num0());
switch (o) {
case equal:
return cmpval==0;
- break;
case not_equal:
return cmpval!=0;
- break;
case less:
return cmpval<0;
- break;
case less_or_equal:
return cmpval<=0;
- break;
case greater:
return cmpval>0;
- break;
case greater_or_equal:
return cmpval>=0;
- break;
default:
throw(std::logic_error("invalid relational operator"));
}
- return 0;
}
//////////
// protected
-unsigned relational::precedence=20;
-
-//////////
-// global constants
-//////////
-
-const relational some_relational;
-const type_info & typeid_relational=typeid(some_relational);
+unsigned relational::precedence = 20;
-#ifndef NO_NAMESPACE_GINAC
} // namespace GiNaC
-#endif // ndef NO_NAMESPACE_GINAC