Package jminusminus

Class JInstanceOfOp

java.lang.Object

jminusminus.JAST

jminusminus.JStatement

jminusminus.JExpression

jminusminus.JInstanceOfOp

class JInstanceOfOp
extends JExpression

The AST node for an instanceof expression, having two arguments: an expression and a reference type.

Field Summary

Fields inherited from class jminusminus.JExpression

isStatementExpression, type

Fields inherited from class jminusminus.JAST

compilationUnit, line

Constructor Summary

Constructors

Constructor	Description
JInstanceOfOp(int line, JExpression expr, Type typeSpec)	Constructs an AST node for an instanceof expression.

Method Summary

Modifier and Type	Method	Description
JInstanceOfOp	analyze(Context context)	Analyzes and returns a JExpression.
void	codegen(CLEmitter output)	Performs code generation for this AST.
void	codegen(CLEmitter output, String targetLabel, boolean onTrue)	Performs short-circuit code generation for a boolean expression, given the code emitter, a target label, and whether we branch to that label on true or on false.
void	toJSON(JSONElement json)	Stores information about this AST in JSON format.

Methods inherited from class jminusminus.JExpression

isStatementExpression, type

Methods inherited from class jminusminus.JAST

line, partialCodegen, unescape

Methods inherited from class java.lang.Object

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

Constructor Details

JInstanceOfOp

public JInstanceOfOp(int line,
 JExpression expr,
 Type typeSpec)

Constructs an AST node for an instanceof expression.

Parameters:

line - the line in which the instanceof expression occurs in the source file.

expr - the expression denoting the value to be tested.

typeSpec - the reference type we are testing for.

Method Details

analyze

public JInstanceOfOp analyze(Context context)

Analyzes and returns a JExpression.

Specified by:

analyze in class JExpression

Parameters:

context - context in which names are resolved.

Returns:

the analyzed (and possibly rewritten) AST subtree.

codegen

public void codegen(CLEmitter output)

Performs code generation for this AST.

Specified by:

codegen in class JAST

Parameters:

output - the code emitter.

codegen

public void codegen(CLEmitter output,
 String targetLabel,
 boolean onTrue)

Performs short-circuit code generation for a boolean expression, given the code emitter, a target label, and whether we branch to that label on true or on false.

Overrides:

codegen in class JExpression

Parameters:

output - the code emitter.

targetLabel - the label to which we should branch.

onTrue - do we branch on true?

toJSON

public void toJSON(JSONElement json)

Stores information about this AST in JSON format.

Overrides:

toJSON in class JAST

Parameters:

json - the JSON emitter.