ExpressionVisitorImpl (RapidPro Expressions 1.4.1 API)

java.lang.Object
- org.antlr.v4.runtime.tree.AbstractParseTreeVisitor<T>
- - io.rapidpro.expressions.ExcellentBaseVisitor<Object>
  - - io.rapidpro.expressions.evaluator.ExpressionVisitorImpl

All Implemented Interfaces:

ExcellentVisitor<Object>, org.antlr.v4.runtime.tree.ParseTreeVisitor<Object>
```
public class ExpressionVisitorImpl
extends ExcellentBaseVisitor<Object>
```
Visitor for our expression trees

Constructor Summary

Constructors
Constructor and Description

ExpressionVisitorImpl(FunctionManager functions, EvaluationContext context)

Constructors
Constructor and Description
`ExpressionVisitorImpl(FunctionManager functions, EvaluationContext context)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Object`	`visitAdditionOrSubtractionExpression(ExcellentParser.AdditionOrSubtractionExpressionContext ctx)` expression: expression (PLUS \| MINUS) expression
`Object`	`visitComparisonExpression(ExcellentParser.ComparisonExpressionContext ctx)` expression: expression (LTE \| LT \| GTE \| GT) expression
`Object`	`visitConcatenation(ExcellentParser.ConcatenationContext ctx)` expression: expression AMPERSAND expression
`Object`	`visitContextReference(ExcellentParser.ContextReferenceContext ctx)` expression: NAME
`Object`	`visitDecimalLiteral(ExcellentParser.DecimalLiteralContext ctx)` expression: DECIMAL
`Object`	`visitEqualityExpression(ExcellentParser.EqualityExpressionContext ctx)` expression: expression (EQ \| NEQ) expression
`Object`	`visitExponentExpression(ExcellentParser.ExponentExpressionContext ctx)` expression: expression EXPONENT expression
`Object`	`visitFalse(ExcellentParser.FalseContext ctx)` expression: FALSE
`Object`	`visitFunctionCall(ExcellentParser.FunctionCallContext ctx)` expression : fnname LPAREN parameters? RPAREN
`Object`	`visitFunctionParameters(ExcellentParser.FunctionParametersContext ctx)` parameters : expression (COMMA expression)*
`Object`	`visitMultiplicationOrDivisionExpression(ExcellentParser.MultiplicationOrDivisionExpressionContext ctx)` expression: expression (TIMES \| DIVIDE) expression
`Object`	`visitNegation(ExcellentParser.NegationContext ctx)` expression: MINUS expression
`Object`	`visitParentheses(ExcellentParser.ParenthesesContext ctx)` expression: LPAREN expression RPAREN
`Object`	`visitParse(ExcellentParser.ParseContext ctx)` Visit a parse tree produced by `ExcellentParser.parse()`.
`Object`	`visitStringLiteral(ExcellentParser.StringLiteralContext ctx)` expression: STRING
`Object`	`visitTrue(ExcellentParser.TrueContext ctx)` expression: TRUE

Methods inherited from class io.rapidpro.expressions.ExcellentBaseVisitor
visitFnname

Methods inherited from class org.antlr.v4.runtime.tree.AbstractParseTreeVisitor
aggregateResult, defaultResult, shouldVisitNextChild, visit, visitChildren, visitErrorNode, visitTerminal

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

Methods inherited from interface org.antlr.v4.runtime.tree.ParseTreeVisitor
visit, visitChildren, visitErrorNode, visitTerminal

- Constructor Detail
  - ExpressionVisitorImpl
```
public ExpressionVisitorImpl(FunctionManager functions,
                             EvaluationContext context)
```
- Method Detail
  - visitParse
```
public Object visitParse(ExcellentParser.ParseContext ctx)
```
    Description copied from class: ExcellentBaseVisitor
    
    Visit a parse tree produced by ExcellentParser.parse().
    The default implementation returns the result of calling AbstractParseTreeVisitor.visitChildren(org.antlr.v4.runtime.tree.RuleNode) on ctx.
    
    Specified by:
    
    visitParse in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitParse in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitFunctionCall
```
public Object visitFunctionCall(ExcellentParser.FunctionCallContext ctx)
```
    expression : fnname LPAREN parameters? RPAREN
    
    Specified by:
    
    visitFunctionCall in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitFunctionCall in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitFunctionParameters
```
public Object visitFunctionParameters(ExcellentParser.FunctionParametersContext ctx)
```
    parameters : expression (COMMA expression)*
    
    Specified by:
    
    visitFunctionParameters in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitFunctionParameters in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitNegation
```
public Object visitNegation(ExcellentParser.NegationContext ctx)
```
    expression: MINUS expression
    
    Specified by:
    
    visitNegation in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitNegation in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitExponentExpression
```
public Object visitExponentExpression(ExcellentParser.ExponentExpressionContext ctx)
```
    expression: expression EXPONENT expression
    
    Specified by:
    
    visitExponentExpression in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitExponentExpression in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitMultiplicationOrDivisionExpression
```
public Object visitMultiplicationOrDivisionExpression(ExcellentParser.MultiplicationOrDivisionExpressionContext ctx)
```
    expression: expression (TIMES | DIVIDE) expression
    
    Specified by:
    
    visitMultiplicationOrDivisionExpression in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitMultiplicationOrDivisionExpression in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitAdditionOrSubtractionExpression
```
public Object visitAdditionOrSubtractionExpression(ExcellentParser.AdditionOrSubtractionExpressionContext ctx)
```
    expression: expression (PLUS | MINUS) expression
    
    Specified by:
    
    visitAdditionOrSubtractionExpression in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitAdditionOrSubtractionExpression in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitComparisonExpression
```
public Object visitComparisonExpression(ExcellentParser.ComparisonExpressionContext ctx)
```
    expression: expression (LTE | LT | GTE | GT) expression
    
    Specified by:
    
    visitComparisonExpression in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitComparisonExpression in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitEqualityExpression
```
public Object visitEqualityExpression(ExcellentParser.EqualityExpressionContext ctx)
```
    expression: expression (EQ | NEQ) expression
    
    Specified by:
    
    visitEqualityExpression in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitEqualityExpression in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitConcatenation
```
public Object visitConcatenation(ExcellentParser.ConcatenationContext ctx)
```
    expression: expression AMPERSAND expression
    
    Specified by:
    
    visitConcatenation in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitConcatenation in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitStringLiteral
```
public Object visitStringLiteral(ExcellentParser.StringLiteralContext ctx)
```
    expression: STRING
    
    Specified by:
    
    visitStringLiteral in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitStringLiteral in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitDecimalLiteral
```
public Object visitDecimalLiteral(ExcellentParser.DecimalLiteralContext ctx)
```
    expression: DECIMAL
    
    Specified by:
    
    visitDecimalLiteral in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitDecimalLiteral in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitTrue
```
public Object visitTrue(ExcellentParser.TrueContext ctx)
```
    expression: TRUE
    
    Specified by:
    
    visitTrue in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitTrue in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitFalse
```
public Object visitFalse(ExcellentParser.FalseContext ctx)
```
    expression: FALSE
    
    Specified by:
    
    visitFalse in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitFalse in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitContextReference
```
public Object visitContextReference(ExcellentParser.ContextReferenceContext ctx)
```
    expression: NAME
    
    Specified by:
    
    visitContextReference in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitContextReference in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result
  - visitParentheses
```
public Object visitParentheses(ExcellentParser.ParenthesesContext ctx)
```
    expression: LPAREN expression RPAREN
    
    Specified by:
    
    visitParentheses in interface ExcellentVisitor<Object>
    
    Overrides:
    
    visitParentheses in class ExcellentBaseVisitor<Object>
    
    Parameters:
    
    ctx - the parse tree
    
    Returns:
    
    the visitor result

Class ExpressionVisitorImpl

Constructor Summary

Method Summary

Methods inherited from class io.rapidpro.expressions.ExcellentBaseVisitor

Methods inherited from class org.antlr.v4.runtime.tree.AbstractParseTreeVisitor

Methods inherited from class java.lang.Object

Methods inherited from interface org.antlr.v4.runtime.tree.ParseTreeVisitor

Constructor Detail

ExpressionVisitorImpl

Method Detail

visitParse

visitFunctionCall

visitFunctionParameters

visitNegation

visitExponentExpression

visitMultiplicationOrDivisionExpression

visitAdditionOrSubtractionExpression

visitComparisonExpression

visitEqualityExpression

visitConcatenation

visitStringLiteral

visitDecimalLiteral

visitTrue

visitFalse

visitContextReference

visitParentheses