EmptyCompiler

java.lang.Object
- com.saxonica.ee.bytecode.ExpressionCompiler
- - com.saxonica.ee.bytecode.ToBooleanCompiler
  - - com.saxonica.ee.bytecode.EmptyCompiler

public class EmptyCompiler
extends ToBooleanCompiler

Generate bytecode for the fn:empty() function

Constructor Summary

Constructors
Constructor Description

EmptyCompiler()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`compileToBoolean(CompilerService compiler, Expression expression)`	Generate bytecode to evaluate the expression as a boolean Precondition: none.

Methods inherited from class com.saxonica.ee.bytecode.ToBooleanCompiler
compileToItem, compileToIterator, compileToPush

Methods inherited from class com.saxonica.ee.bytecode.ExpressionCompiler
allocateStatic, compileItemFromInt, compileToPrimitive, generateMethod, handleEmptyStringResult, printStackTop, verify, visitAnnotation, visitLineNumber

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

- Constructor Detail
  - EmptyCompiler
```
public EmptyCompiler()
```
- Method Detail
  - compileToBoolean
```
public void compileToBoolean(CompilerService compiler,
                             Expression expression)
                      throws CannotCompileException
```
    Description copied from class: ExpressionCompiler
    
    Generate bytecode to evaluate the expression as a boolean Precondition: none. Postcondition: at execution time, the stack contains an integer (0=false, 1=true) representing the result of the expression
    
    Specified by:
    
    compileToBoolean in class ExpressionCompiler
    
    Parameters:
    
    compiler - the compiler service
    
    expression - the expression to be compiled
    
    Throws:
    
    CannotCompileException - if the expression cannot be compiled to bytecode