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Expr::Var(3) User Contributed Perl Documentation Expr::Var(3)
 

  Math::Expr::Var - Represents one variable in a parsed expression tree

  require Math::Expr::Opp;
  require Math::Expr::Var;
  require Math::Expr::Num;
  
  # To represent the expression "x+7":
  $n=new Math::Expr::Opp("+");
  $n->SetOpp(0,new Math::Expr::Var("x"));
  $n->SetOpp(1,new Math::Expr::Num(7));
  print $n->tostr . "\n";

  Used by the Math::Expr to represent variables.

  Creates a new representation of the variable named $name.

  Returns the string representation of the variable, that is the 
  variable name.

  Returns the type of the variable.

  Simply cals strtype, its needed to be compatible with the other 
  elements in the structure.

  Mathces a rule expression with the variable, and returns an array of 
  VarSet objects with this variable name set to the expression if there 
  types match.

  Used by upper level Match procedure to match an entire expression.

  Returns this variables vaule taken from $vars or a new copy of itselfe 
  if it does not excist.

Returns a new copy of itself.

  Hakan Ardo <hakan@debian.org>

  L<Math::Expr::Opp>
1998-12-19 perl v5.28.1

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