LambdaDefinitionNode (QDL root module 1.6.0 API)

java.lang.Object
- org.qdl_lang.expressions.ExpressionImpl
- - org.qdl_lang.functions.LambdaDefinitionNode

All Implemented Interfaces:

Serializable, ExpressionNode, ExpressionInterface, HasResultInterface, Statement
```
public class LambdaDefinitionNode
extends ExpressionImpl
```
To treat defined lambda expressions they must be edu.uiuc.ncsa.qdl.expressions.ExpressionNodes This wraps a FunctionDefinitionStatement, which cannot be replaced. The strategy is to swap out FDS for these at very specific places to allow for passing lambdas as arguments.
Created by Jeff Gaynor
on 6/3/21 at 8:45 AM

See Also:

Serialized Form

Field Summary
- Fields inherited from class org.qdl_lang.expressions.ExpressionImpl
  arguments, result, valence
- Fields inherited from interface org.qdl_lang.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

LambdaDefinitionNode(int operatorType)

LambdaDefinitionNode(FunctionDefinitionStatement fds)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`evaluate(State state)`
`FunctionRecord`	`getFunctionRecord()`
`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`	`hasName()`
`boolean`	`isLambda()`
`ExpressionInterface`	`makeCopy()`
`void`	`setFunctionRecord(FunctionRecord functionRecord)`
`void`	`setLambda(boolean lambda)`

Methods inherited from class org.qdl_lang.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, toString

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

- Constructor Detail
  - LambdaDefinitionNode
```
public LambdaDefinitionNode(FunctionDefinitionStatement fds)
```
  - LambdaDefinitionNode
```
public LambdaDefinitionNode(int operatorType)
```
- Method Detail
  - hasName
```
public boolean hasName()
```
  - evaluate
```
public Object evaluate(State state)
```
  - makeCopy
```
public ExpressionInterface makeCopy()
```
  - isLambda
```
public boolean isLambda()
```
  - setLambda
```
public void setLambda(boolean lambda)
```
  - getFunctionRecord
```
public FunctionRecord getFunctionRecord()
```
  - setFunctionRecord
```
public void setFunctionRecord(FunctionRecord functionRecord)
```
  - 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: