jminusminus

Class JLiteralNull

java.lang.Object

jminusminus.JAST

jminusminus.JStatement

jminusminus.JExpression

jminusminus.JLiteralNull

 class JLiteralNull
extends JExpression

The AST node for the null literal.

Field Summary

Fields inherited from class jminusminus.JExpression

isStatementExpression, type

Fields inherited from class jminusminus.JAST

compilationUnit, line

Constructor Summary

Constructors

Constructor and Description
JLiteralNull(int line) Construct an AST node for the null literal given its line number.

Method Summary

Methods

Modifier and Type	Method and Description
JExpression	analyze(Context context) Analyzing the null literal is trivial.
void	codegen(CLEmitter output) Generating code for a null literal means generating code to push it onto the stack.
void	writeToStdOut(PrettyPrinter p) Write the information pertaining to this AST to STDOUT.

Methods inherited from class jminusminus.JExpression

codegen, isStatementExpression, type

Methods inherited from class jminusminus.JAST

line, partialCodegen

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JLiteralNull

public JLiteralNull(int line)

Construct an AST node for the null literal given its line number.

Parameters:

line - line in which the literal occurs in the source file.

Method Detail

analyze

public JExpression analyze(Context context)

Analyzing the null literal is trivial.

Specified by:

analyze in class JExpression

Parameters:

context - context in which names are resolved (ignored here).

Returns:

the analyzed (and possibly rewritten) AST subtree.

codegen

public void codegen(CLEmitter output)

Generating code for a null literal means generating code to push it onto the stack.

Specified by:

codegen in class JAST

Parameters:

output - the code emitter (basically an abstraction for producing the .class file).

writeToStdOut

public void writeToStdOut(PrettyPrinter p)

Description copied from class: JAST

Write the information pertaining to this AST to STDOUT.

Specified by:

writeToStdOut in class JAST

Parameters:

p - for pretty printing with indentation.