Numerical expression parser. More...
#include <evalfunc.hpp>
Collaboration diagram for ngstd::EvalFunction:
Classes | |
| struct | argtype |
| the arguments passed to the function More... | |
| class | ResultType |
| class | step |
| one step of evaluation More... | |
Public Member Functions | |
| EvalFunction (istream &aist) | |
| parse from input stream | |
| EvalFunction (const string &str) | |
| parse from string | |
| EvalFunction (const EvalFunction &eval2) | |
| bool | Parse (istream &aist) |
| parse from stream | |
| void | DefineConstant (const string &name, double val) |
| define constant | |
| void | DefineGlobalVariable (const string &name, double *var) |
| define constant | |
| void | DefineGlobalVariable (const string &name, GenericVariable *var) |
| define constant | |
| void | DefineArgument (const string &name, int num, int vecdim=1, bool iscomplex=false) |
| define arguments | |
| double | Eval (const double *x=NULL) const |
| evaluate function | |
| void | Eval (const double *x, double *y, int ydim) const |
| evaluate multi-value function | |
| complex< double > | Eval (const complex< double > *x=NULL) const |
| evaluate function | |
| void | Eval (const complex< double > *x, complex< double > *y, int ydim) const |
| evaluate multi-value complex function | |
| void | Eval (const complex< double > *x, double *y, int ydim) const |
| evaluate multi-value complex function with real result | |
| template<typename TIN , typename TCALC > | |
| void | Eval (const TIN *x, TCALC *stack) const |
| bool | IsComplex () const |
| is expression complex valued ? | |
| bool | IsResultComplex () const |
| is expression complex valued ? | |
| bool | IsConstant () const |
| is expression a constant ? | |
| double | EvalConstant () const |
| evaluate the constant value | |
| int | Dimension () const |
| vector dimension of result | |
| void | AddConstant (double val) |
| push constant on stack. | |
| void | AddVariable (int varnum) |
| push variable x[varnum-1]. | |
| void | AddGlobVariable (const double *dp) |
| push pointer to global double value. | |
| void | AddGlobVariable (const GenericVariable *dp) |
| push pointer to global double value. | |
| void | AddOperation (EVAL_TOKEN op) |
| push operation. | |
| void | AddFunction (double(*fun)(double)) |
| push function call. | |
| void | Print (ostream &ost) const |
| print expression | |
| EVAL_TOKEN | GetToken () const |
| returns last token | |
| double | GetNumValue () const |
| returns num_value of last token | |
| int | GetVariableNumber () const |
| returns variable number of last token | |
| int | GetVariableDimension () const |
| returns dimension of variable of last token | |
| bool | GetVariableIsComplex () const |
| const char * | GetStringValue () const |
| returns identifier of last token | |
| void | ReadNext (bool optional=true) |
| read next token | |
| void | WriteBack () |
| bool | ToBool (double x) const |
| bool | ToBool (complex< double > x) const |
| double | CheckReal (double x) const |
| double | CheckReal (complex< double > x) const |
| double | Abs (double x) const |
| double | Abs (complex< double > x) const |
Public Attributes | |
| SymbolTable< argtype > | arguments |
| int | num_arguments |
Protected Types | |
| typedef double(* | TFUNP )(double) |
Protected Member Functions | |
| ResultType | ParseExpression () |
| parsing expression (standard parsing grammer) | |
| ResultType | ParseCommaExpression () |
| parsing expression (standard parsing grammer) | |
| ResultType | ParseSubExpression () |
| parsing expression (standard parsing grammer) | |
| ResultType | ParseTerm () |
| parsing expression (standard parsing grammer) | |
| ResultType | ParsePrimary () |
| parsing expression (standard parsing grammer) | |
Protected Attributes | |
| Array< step > | program |
| the evaluation sequence | |
| ResultType | res_type |
| const double | eps |
| istream * | ist |
| parse from stream | |
| EVAL_TOKEN | token |
| double | num_value |
| char | string_value [1000] |
| int | var_num |
| int | var_dim |
| bool | var_iscomplex |
| double * | globvar |
| GenericVariable * | globgenvar |
| streampos | lastpos |
| SymbolTable< double > | constants |
| registerd constants | |
| SymbolTable< double * > | globvariables |
| registerd variables | |
| SymbolTable< GenericVariable * > | genericvariables |
| registerd variables | |
Static Protected Attributes | |
| static SymbolTable< TFUNP > | functions |
| registerd functions | |
Detailed Description
Numerical expression parser.
The expression is stored in reverse Polnish notation. The evaluation tree can be filled form an external parser, see Addxxx methods.
The documentation for this class was generated from the following file:
- ngstd/evalfunc.hpp
