In This Package:

RuleParser Namespace Reference

PrescaleRule Nathaniel Tagg (tagg@minos.phy.tufts.edu) Example of a custom rule and factory that can do prescaling. More...

Classes
class	ParameterDescription
class	ParameterList
class	PrescaleRule
	Example of a custom rule and factory that can do prescaling. More...
class	PrescaleRuleFactory
	Example of a custom rule and factory that can do prescaling. More...
class	Queriable
class	RuleFactory
	(non)virtual base class for a user-creatable class that makes a rule. More...
class	Rule
	Base class for a generic rule. More...
class	AnyRule
	Always returns true, for any input. More...
class	NoneRule
	Always returns false, for any input. More...
class	AndRule
	Logical AND of two owned rules. More...
class	OrRule
	Logical OR of two owned rules. More...
class	NotRule
	negates owned rules. More...
class	LT_Rule
	Less than rule - is parameter less than cut? More...
class	LE_Rule
	Less-than or equal-to than rule - is parameter less than cut? More...
class	GT_Rule
	Less than rule - is parameter less than cut? More...
class	GE_Rule
	Greater-than or equal-to than rule - is parameter less than cut? More...
class	EQ_Rule
	equal-to rule More...
class	NEQ_Rule
	not-equal-to rule More...
Functions
bool	CreateRules (const std::string &inString, const ParameterList &inParameters, Rule *&outRule)
	CreateRules This function will parse the string given, and return a created tree of Rules that can be used to evaluate whatever object the user wants. The parameter list provided will define the rules. The returned Rule object is owned by the caller. Deleteing this object will destroy the calling tree. Returns true for success, false for parsing failure. Will print to cout any parsing problems.

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Detailed Description

PrescaleRule Nathaniel Tagg (tagg@minos.phy.tufts.edu) Example of a custom rule and factory that can do prescaling.

To use: Declare a parameter: ParameterDescription("prescale",0,typeid(int),std::vector<std::string>(1,"by"),PrescaleRuleFactory)

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Function Documentation

bool RuleParser::CreateRules	(	const std::string &	inString,
		const ParameterList &	inParameters,
		Rule *&	outRule
	)

CreateRules This function will parse the string given, and return a created tree of Rules that can be used to evaluate whatever object the user wants. The parameter list provided will define the rules. The returned Rule object is owned by the caller. Deleteing this object will destroy the calling tree. Returns true for success, false for parsing failure. Will print to cout any parsing problems.

Author:

Nathaniel Tagg

Definition at line 522 of file CreateRules.cc.

{
  
  ParserStore store;  //mustn't delete until ruleparser is dead.
  ruleparser rp(store,inParameters);    //  Our parser

  // Default.
  outRule = 0; // Failure.

  if(inString.empty()) {
    // In the case of no selection, default to selecting nothing.
    outRule = new NoneRule;
  }
  
  store.clear();
  
  // Fix for a bug in Spirit.. this is the recommended workaround.
  parse_info<> info = parse(inString.c_str(), rp, space_p);

  if (info.full)
  {
    outRule = store.mStackRules.top();
    return true;
  }
  cerr << "-------------------------\n";
  cerr << "Parsing failed\n";
  cerr << "stopped at: \"" << info.stop << "\"\n";
  cerr << "-------------------------\n";
  return false;
}

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