ExpressionNode (QDL root module 1.6.0 API)

All Superinterfaces:

ExpressionInterface, HasResultInterface, Serializable, Statement

All Known Implementing Classes:

AllIndices, AltIfExpressionNode, ANode2, ClosedSliceNode, ComparisonDyad, ConstantNode, Dyad, DyadicFunctionReferenceNode, ESN2, ExpressionImpl, FunctionReferenceNode, LambdaDefinitionNode, ModuleExpression, Monad, Nilad, OpenSliceNode, ParenthesizedExpression, Polyad, QDLNull, SelectExpressionNode, StemExtractionNode, VariableNode
```
public interface ExpressionNode
extends ExpressionInterface
```
This class mostly manages the structure of expressions (so arguments are the children) and evaluating them is delegating the result to the OpEvaluator class.
Created by Jeff Gaynor
on 1/13/20 at 3:02 PM

Field Summary

Fields
Modifier and Type Field Description

static int 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

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ExpressionInterface`	`getArgAt(int index)`
`int`	`getArgCount()`
`ArrayList<ExpressionInterface>`	`getArguments()`
`int`	`getOperatorType()`
`void`	`setArguments(ArrayList<ExpressionInterface> arguments)`
`void`	`setOperatorType(int operatorType)`

Methods inherited from interface org.qdl_lang.statements.ExpressionInterface
getAlias, getNodeType, hasAlias, makeCopy, setAlias

Methods inherited from interface org.qdl_lang.statements.HasResultInterface
getResult, getResultType, isEvaluated, setEvaluated, setResult, setResultType

Methods inherited from interface org.qdl_lang.statements.Statement
evaluate, getSourceCode, getTokenPosition, hasTokenPosition, setSourceCode, setTokenPosition

Field Detail
- valence
```
static final int valence
```
  See Also:
  
  Constant Field Values

Method Detail

getArguments

ArrayList<ExpressionInterface> getArguments()

getArgAt

ExpressionInterface getArgAt(int index)

setArguments

void setArguments(ArrayList<ExpressionInterface> arguments)

getArgCount
```
int getArgCount()
```

getOperatorType
```
int getOperatorType()
```

setOperatorType

void setOperatorType(int operatorType)