jminusminus

Class JLogicalAndOp

java.lang.Object

jminusminus.JAST

jminusminus.JStatement

jminusminus.JExpression

jminusminus.JBinaryExpression

jminusminus.JBooleanBinaryExpression

jminusminus.JLogicalAndOp

 class JLogicalAndOp
extends JBooleanBinaryExpression

The AST node for a logical AND (&&) expression. Implements short-circuiting branching.

Field Summary

Fields inherited from class jminusminus.JBinaryExpression

lhs, operator, rhs

Fields inherited from class jminusminus.JExpression

isStatementExpression, type

Fields inherited from class jminusminus.JAST

compilationUnit, line

Constructor Summary

Constructors

Constructor and Description
JLogicalAndOp(int line, JExpression lhs, JExpression rhs) Construct an AST node for a logical AND expression given its line number, and lhs and rhs operands.

Method Summary

Methods

Modifier and Type	Method and Description
JExpression	analyze(Context context) Analyzing a logical AND expression involves analyzing its operands and insuring they are boolean; the result type is of course boolean.
void	codegen(CLEmitter output, String targetLabel, boolean onTrue) The semantics of j-- require that we implement short-circuiting branching in implementing the logical AND.

Methods inherited from class jminusminus.JBooleanBinaryExpression

codegen

Methods inherited from class jminusminus.JBinaryExpression

writeToStdOut

Methods inherited from class jminusminus.JExpression

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

JLogicalAndOp

public JLogicalAndOp(int line,
             JExpression lhs,
             JExpression rhs)

Construct an AST node for a logical AND expression given its line number, and lhs and rhs operands.

Parameters:

line - line in which the logical AND expression occurs in the source file.

lhs - lhs operand.

rhs - rhs operand.

Method Detail

analyze

public JExpression analyze(Context context)

Analyzing a logical AND expression involves analyzing its operands and insuring they are boolean; the result type is of course boolean.

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,
           String targetLabel,
           boolean onTrue)

The semantics of j-- require that we implement short-circuiting branching in implementing the logical AND.

Overrides:

codegen in class JExpression

Parameters:

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

targetLabel - target for generated branch instruction.

onTrue - should we branch on true?