Evaluator for parameter expressions written in daslang. More...

Public Member Functions
bool	evalFloat (const String &expression, const ExpressionContext *context, floatT &result, String &error)
	Evaluates an expression and returns its result as a float.

bool	evalInt (const String &expression, const ExpressionContext *context, intT &result, String &error)
	Evaluates an expression and returns its result as an integer.

bool	evalString (const String &expression, const ExpressionContext *context, String &result, String &error)
	Evaluates an expression and returns its result as a string.

	ExpressionEngine (const ExpressionEngine &)=delete

ExpressionEngine &	operator= (const ExpressionEngine &)=delete

Static Public Member Functions
static ExpressionEngine &	instance ()

Detailed Description

Evaluator for parameter expressions written in daslang.

A bare expression such as "5 + 5" is wrapped in a function, compiled through DasRuntime, and run to produce a parameter value.

Note: Compiled expressions are cached so repeated evaluation during cooking stays cheap.

Member Function Documentation

bool enzo::expr::ExpressionEngine::evalFloat	(	const String &	expression,
		const ExpressionContext *	context,
		floatT &	result,
		String &	error )

Evaluates an expression and returns its result as a float.

Parameters

context The world the expression reads, e.g. for prm(), may be null.

Returns: True on success, false when the expression fails to compile or run.

bool enzo::expr::ExpressionEngine::evalInt	(	const String &	expression,
		const ExpressionContext *	context,
		intT &	result,
		String &	error )

Evaluates an expression and returns its result as an integer.

Parameters

context The world the expression reads, e.g. for prm(), may be null.

Returns: True on success, false when the expression fails to compile or run.

bool enzo::expr::ExpressionEngine::evalString	(	const String &	expression,
		const ExpressionContext *	context,
		String &	result,
		String &	error )

Evaluates an expression and returns its result as a string.

Parameters

context The world the expression reads, e.g. for prm(), may be null.

Returns: True on success, false when the expression fails to compile or run.

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