PlotExpressionParser Class Reference

Parses plot expressions into a PlotExpression that can be bound and executed. More...

#include <plotexpressionparser.h>

Public Member Functions
	PlotExpressionParser (const PlotFunctionRegister *functionRegister=nullptr)
	Create an expression parser. More...
	~PlotExpressionParser ()
	Destructor.
const PlotFunctionRegister &	functionRegister () const
	Returns the function register. More...
PlotExpression *	parse (const QString &expression, QStringList &errors)
	Attempt to parse the expression and return the operation. More...

Detailed Description

Parses plot expressions into a PlotExpression that can be bound and executed.

Supports single line expressions using +, -, *, /, bracketing, negation and constants (double precision numbers). The operands are the names of existing plot curves. Bracketing operations and precedence are also supported.

Constructor & Destructor Documentation

PlotExpressionParser::PlotExpressionParser

(

const PlotFunctionRegister *

functionRegister = nullptr

)

Create an expression parser.

Parameters

functionRegister

Optional function register to use. Uses the default implementation if not specified.

Member Function Documentation

const PlotFunctionRegister& PlotExpressionParser::functionRegister

(

)

const

Returns the function register.

This is either the one provided on construction, or the default implementation.

Returns

The parser's function register.

PlotExpression* PlotExpressionParser::parse	(	const QString &	expression,
		QStringList &	errors
	)

Attempt to parse the expression and return the operation.

On failure, error messages are available in errors.

Parameters

expression	The expression string to parser.
errors	Errors messages are added here.

Returns

A valid PlotExpression on success, or null on failure.

---

The documentation for this class was generated from the following file:

• plotexpressionparser.h