jminusminus

Class JEqualOp

java.lang.Object

jminusminus.JAST

jminusminus.JStatement

jminusminus.JExpression

jminusminus.JBinaryExpression

jminusminus.JBooleanBinaryExpression

jminusminus.JEqualOp

 class JEqualOp
extends JBooleanBinaryExpression

The AST node for an equality (==) 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
JEqualOp(int line, JExpression lhs, JExpression rhs) Construct an AST node for an equality expression.

Method Summary

Methods

Modifier and Type	Method and Description
JExpression	analyze(Context context) Analyzing an equality expression means analyzing its operands and checking that the types match.
void	codegen(CLEmitter output, String targetLabel, boolean onTrue) Branching code generation for == operation.

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

JEqualOp

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

Construct an AST node for an equality expression.

Parameters:

line - line number in which the equality expression occurs in the source file.

lhs - lhs operand.

rhs - rhs operand.

Method Detail

analyze

public JExpression analyze(Context context)

Analyzing an equality expression means analyzing its operands and checking that the types match.

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)

Branching code generation for == operation.

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?