jminusminus

Class JSubtractOp

java.lang.Object

jminusminus.JAST

jminusminus.JStatement

jminusminus.JExpression

jminusminus.JBinaryExpression

jminusminus.JSubtractOp

 class JSubtractOp
extends JBinaryExpression

The AST node for a subtraction (-) expression.

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
JSubtractOp(int line, JExpression lhs, JExpression rhs) Construct an AST node for a subtraction expression given its line number, and lhs and rhs operands.

Method Summary

Methods

Modifier and Type	Method and Description
JExpression	analyze(Context context) Analyzing the - operation involves analyzing its operands, checking types, and determining the result type.
void	codegen(CLEmitter output) Generating code for the - operation involves generating code for the two operands, and then the subtraction instruction.

Methods inherited from class jminusminus.JBinaryExpression

writeToStdOut

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

JSubtractOp

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

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

Parameters:

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

lhs - the lhs operand.

rhs - the rhs operand.

Method Detail

analyze

public JExpression analyze(Context context)

Analyzing the - operation involves analyzing its operands, checking types, and determining the result type.

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)

Generating code for the - operation involves generating code for the two operands, and then the subtraction instruction.

Specified by:

codegen in class JAST

Parameters:

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