com.saxonica.ee.bytecode

Class VariableReferenceCompiler

java.lang.Object

com.saxonica.ee.bytecode.ExpressionCompiler

com.saxonica.ee.bytecode.ToIteratorCompiler

com.saxonica.ee.bytecode.VariableReferenceCompiler

public class VariableReferenceCompiler
extends ToIteratorCompiler

Generate bytecode for evaluation of a VariableReference

Constructor Summary

Constructors

Constructor and Description
VariableReferenceCompiler()

Method Summary

Modifier and Type	Method and Description
void	compileToBoolean(CompilerService compiler, Expression expression) Generate bytecode to evaluate the expression as a boolean Precondition: none.
void	compileToItem(CompilerService compiler, Expression expression) Generate bytecode to evaluate a VariableReference as an Item Precondition: none.
void	compileToIterator(CompilerService compiler, Expression expression) Generate bytecode to evaluate a VariableReference as an Iterator Precondition: none.
void	compileToPush(CompilerService compiler, Expression expression) Generate bytecode to evaluate a VariableReference in push mode Precondition: none.
static void	compileToSequence(CompilerService compiler, VariableReference expression) Generate bytecode to evaluate a VariableReference as an Sequence Precondition: none.
static void	genEvaluateVariable(CompilerService compiler, Generator ga, VariableReference expression)

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

VariableReferenceCompiler

public VariableReferenceCompiler()

Method Detail

compileToIterator

public void compileToIterator(CompilerService compiler,
                              Expression expression)
                       throws CannotCompileException

Generate bytecode to evaluate a VariableReference as an Iterator Precondition: none. Postcondition: the stack contains an Iterator representing the evaluated variable

Specified by:

compileToIterator in class ExpressionCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode

compileToSequence

public static void compileToSequence(CompilerService compiler,
                                     VariableReference expression)
                              throws CannotCompileException

Generate bytecode to evaluate a VariableReference as an Sequence Precondition: none. Postcondition: the stack contains a Sequence representing the evaluated variable

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode

genEvaluateVariable

public static void genEvaluateVariable(CompilerService compiler,
                                       Generator ga,
                                       VariableReference expression)

compileToItem

public void compileToItem(CompilerService compiler,
                          Expression expression)
                   throws CannotCompileException

Generate bytecode to evaluate a VariableReference as an Item Precondition: none. Postcondition: the stack contains an Item representing the evaluated variable

Overrides:

compileToItem in class ToIteratorCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode

compileToPush

public void compileToPush(CompilerService compiler,
                          Expression expression)
                   throws CannotCompileException

Generate bytecode to evaluate a VariableReference in push mode Precondition: none. Postcondition: the stack is unchanged

Overrides:

compileToPush in class ToIteratorCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode

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

Overrides:

compileToBoolean in class ToIteratorCompiler

Parameters:

compiler - the compiler service

expression - the expression to be compiled

Throws:

CannotCompileException - if the expression cannot be compiled to bytecode