Polyad (QDL root module 1.5.6 API)

java.lang.Object
- edu.uiuc.ncsa.qdl.expressions.ExpressionImpl
- - edu.uiuc.ncsa.qdl.expressions.Polyad

All Implemented Interfaces:

ExpressionNode, ExpressionInterface, HasResultInterface, Statement, Serializable
```
public class Polyad
extends ExpressionImpl
```
For multiple arguments. This is used, e.g., for all functions.
Created by Jeff Gaynor
on 1/16/20 at 6:12 AM

See Also:

Serialized Form

Field Summary
- Fields inherited from class edu.uiuc.ncsa.qdl.expressions.ExpressionImpl
  arguments, result, valence
- Fields inherited from interface edu.uiuc.ncsa.qdl.statements.ExpressionInterface
  ALL_INDICES_NODE, ALT_IF_NODE, ASSIGNMENT_NODE, CLOSED_SLICE_NODE, COMPARISON_DYAD_NODE, CONSTANT_NODE, DYAD_NODE, DYADIC_FUNCTION_REFERENCE_NODE, EXPRESSION_STEM_NODE, EXPRESSION_STEM2_NODE, FUNCTION_REFERENCE_NODE, LAMBDA_DEFINITION_NODE, LIST_NODE, MODULE_NODE, MONAD_NODE, NILAD_NODE, OPEN_SLICE_NODE, PARENTHESIZED_NODE, PARSE_EXPRESSION_BLOCK_NODE, PARSE_STATEMENT_BLOCK_NODE, POLYAD_NODE, QDL_NULL_NODE, SELECT_NODE, SET_NODE, STEM_ENTRY_NODE, STEM_EXTRACTION_NODE, STEM_NODE, UNKNOWN_NODE, VARIABLE_NODE

Constructor Summary

Constructors
Constructor Description

Polyad()

Polyad(int operatorType)

Polyad(TokenPosition tokenPosition)

Polyad(String name)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addArgument(ExpressionInterface expr)`
`Object`	`evaluate(State state)`
`String`	`getName()`	Human readable name for this.
`int`	`getNodeType()`	QDL is not strongly typed but Java is, so each node type should have a unique integer and conditionals should use that, not the instanceof operator.
`boolean`	`isBuiltIn()`
`ExpressionNode`	`makeCopy()`
`void`	`setBuiltIn(boolean builtIn)`
`void`	`setName(String name)`
`String`	`toString()`

Methods inherited from class edu.uiuc.ncsa.qdl.expressions.ExpressionImpl
evalArg, evalLastArg, evaluatedArgs, getAlias, getArgAt, getArgCount, getArguments, getEvaluatedArgs, getLastArg, getOperatorType, getResult, getResultType, getSourceCode, getTokenPosition, hasAlias, hasEvaluatedArgs, hasTokenPosition, isEvaluated, isSizeQuery, setAlias, setArguments, setEvaluated, setEvaluatedArgs, setOperatorType, setResult, setResultType, setSizeQuery, setSourceCode, setTokenPosition

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Polyad
```
public Polyad()
```
  - Polyad
```
public Polyad(TokenPosition tokenPosition)
```
  - Polyad
```
public Polyad(String name)
```
  - Polyad
```
public Polyad(int operatorType)
```
- Method Detail
  - getName
```
public String getName()
```
    Human readable name for this.
    
    Returns:
  - setName
```
public void setName(String name)
```
  - isBuiltIn
```
public boolean isBuiltIn()
```
  - setBuiltIn
```
public void setBuiltIn(boolean builtIn)
```
  - evaluate
```
public Object evaluate(State state)
```
  - addArgument
```
public void addArgument(ExpressionInterface expr)
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class ExpressionImpl
  - makeCopy
```
public ExpressionNode makeCopy()
```
  - getNodeType
```
public int getNodeType()
```
    Description copied from interface: ExpressionInterface
    
    QDL is not strongly typed but Java is, so each node type should have a unique integer and conditionals should use that, not the instanceof operator. This allows for efficient programming with switch statements rather than a bevy of conditionals (potentially each of which gets done even if the correct case has been handled).
    
    Returns: