ExpressionFunctionType

All Known Implementing Classes:

CommonFunctions
```
public interface ExpressionFunctionType
```
Describes a type of function entry point.

Author:

Matthew Tropiano

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`execute(ExpressionStack stack, ExpressionVariableContext context)`	Executes this function.
`int`	`getArgumentCount()`
`boolean`	`isCollapsable()`	Checks if this node type is collapsable.
`String`	`name()`	Gets the name of this function.

- Method Detail
  - name
```
String name()
```
    Gets the name of this function. This name returned must be a valid name that can be parsed in the script ("identifier" type: starts with letter, alphanumeric plus "_").
    
    Returns:
    
    the function name.
  - getArgumentCount
```
int getArgumentCount()
```
    Returns:
    
    the amount of arguments this takes.
  - isCollapsable
```
boolean isCollapsable()
```
    Checks if this node type is collapsable. "Collapsible" functions should be completely deterministic and stable (returns the same things given the same input). This aids in optimizing scripts.
    
    Returns:
    
    true if so, false if not.
  - execute
```
boolean execute(ExpressionStack stack,
                ExpressionVariableContext context)
```
    Executes this function.
    
    Parameters:
    
    stack - the stack to use.
    
    context - the context for added variables.
    
    Returns:
    
    if false, this halts script execution, else if true, continue.