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ASTPrintTree.java
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312 lines (264 loc) · 7.46 KB
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import java.util.Vector;
public class ASTPrintTree implements ASTVisitor {
static final int indentstep = 3;
int indentlevel = 0;
void Print(String word) {
int i;
for (i=0; i < indentstep * indentlevel; i++)
System.out.print(" ");
System.out.println(word);
}
public Object VisitArrayVariable(ASTArrayVariable array) {
Print("Array Variable (base/index)");
indentlevel++;
array.base().Accept(this);
array.index().Accept(this);
indentlevel--;
return null;
}
public Object VisitAssignmentStatement(ASTAssignmentStatement assign) {
Print("Assign (lhs/rhs)");
indentlevel++;
assign.variable().Accept(this);
assign.value().Accept(this);
indentlevel--;
return null;
}
public Object VisitBaseVariable(ASTBaseVariable base) {
Print("Base Variable " + base.name());
return null;
}
public Object VisitBooleanLiteral(ASTBooleanLiteral boolliteral) {
if (boolliteral.value() == true)
Print("TRUE");
else
Print("FALSE");
return null;
}
public Object VisitClass(ASTClass classs) {
Print("Class: " + classs.name());
indentlevel++;
if (classs.variabledefs() != null)
classs.variabledefs().Accept(this);
indentlevel--;
return null;
}
public Object VisitClasses(ASTClasses classes) {
int i;
for (i=0; i<classes.size();i++)
classes.elementAt(i).Accept(this);
return null;
}
public Object VisitClassVariable(ASTClassVariable classvariable) {
Print("Class Variable:");
indentlevel++;
classvariable.base().Accept(this);
Print(classvariable.variable());
indentlevel--;
return null;
}
public Object VisitDoWhileStatement(ASTDoWhileStatement dowhile) {
Print("Do-while (test/body)");
indentlevel++;
dowhile.test().Accept(this);
dowhile.body().Accept(this);
indentlevel--;
return null;
}
public Object VisitEmptyStatement(ASTEmptyStatement empty) {
Print("Empty Statement");
return null;
}
public Object VisitForStatement(ASTForStatement forstmt) {
Print("For (initialize/test/increment/body)");
indentlevel++;
forstmt.initialize().Accept(this);
forstmt.test().Accept(this);
forstmt.increment().Accept(this);
forstmt.body().Accept(this);
indentlevel--;
return null;
}
public Object VisitFormal(ASTFormal formal) {
String array = "";
for (int i = 0; i < formal.arraydimension();i++) {
array = array + "[]";
}
Print(formal.type() + " " + formal.name() + array);
return null;
}
public Object VisitFormals(ASTFormals formals) {
int i;
if ((formals == null) || formals.size() == 0)
Print("No formal parameters");
else
Print("Formals:");
indentlevel++;
for (i=0; i<formals.size(); i++) {
formals.elementAt(i).Accept(this);
}
indentlevel--;
return null;
}
public Object VisitFunction(ASTFunction function) {
Print("Function Definition: " + function.name() + " Return type: " + function.type());
// Print return type
indentlevel++;
if (function.formals() != null)
function.formals().Accept(this);
function.body().Accept(this);
indentlevel--;
return null;
}
public Object VisitFunctionDefinitions(ASTFunctionDefinitions functiondefs) {
int i;
for (i=0; i < functiondefs.size(); i++)
functiondefs.elementAt(i).Accept(this);
return null;
}
public Object VisitFunctionCallExpression(ASTFunctionCallExpression functioncall) {
int i;
Print("Function Call: "+functioncall.name());
indentlevel++;
for (i=0; i<functioncall.size(); i++)
functioncall.elementAt(i).Accept(this);
indentlevel--;
return null;
}
public Object VisitFunctionCallStatement(ASTFunctionCallStatement functioncall) {
int i;
Print("Function Call: "+functioncall.name());
indentlevel++;
for (i=0; i<functioncall.size(); i++)
functioncall.elementAt(i).Accept(this);
indentlevel--;
return null;
}
public Object VisitIfStatement(ASTIfStatement ifstmt) {
Print("If (test/if body/else body)");
indentlevel++;
ifstmt.test().Accept(this);
ifstmt.thenstatement().Accept(this);
if (ifstmt.elsestatement() != null)
ifstmt.elsestatement().Accept(this);
else
Print("No else statement");
indentlevel--;
return null;
}
public Object VisitIntegerLiteral(ASTIntegerLiteral literal) {
Print(Integer.toString(literal.value()));
return null;
}
public Object VisitNewArrayExpression(ASTNewArrayExpression newarray) {
String suffix = "";
int i;
for(i=0; i< newarray.arraydimension(); i++)
suffix = suffix + "[]";
Print("New Array of "+newarray.type() + suffix);
// print out dimensionality of element
indentlevel++;
newarray.elements().Accept(this);
indentlevel--;
return null;
}
public Object VisitNewClassExpression(ASTNewClassExpression newclass) {
Print("New " + newclass.type());
return null;
}
public Object VisitOperatorExpression(ASTOperatorExpression opexpr) {
Print(ASTOperatorExpression.names[opexpr.operator()]);
indentlevel++;
opexpr.left().Accept(this);
opexpr.right().Accept(this);
indentlevel--;
return null;
}
public Object VisitProgram(ASTProgram program) {
if (program.classes() != null)
program.classes().Accept(this);
if (program.functiondefinitions() != null)
program.functiondefinitions().Accept(this);
return null;
}
public Object VisitPrototype(ASTPrototype prototype) {
int i;
Print("Prototype: " + prototype.type() +" " + prototype.name());
indentlevel++;
if (prototype.formals() != null) {
for (i=0; i < prototype.formals().size(); i++)
prototype.formals().elementAt(i).Accept(this);
if (prototype.formals().size() == 0)
Print("No Formals");
} else {
Print("No Formals");
}
indentlevel--;
return null;
}
public Object VisitReturnStatement(ASTReturnStatement ret) {
Print("Return");
indentlevel++;
if (ret.value() != null)
ret.value().Accept(this);
indentlevel--;
return null;
}
public Object VisitStatements(ASTStatements statements) {
int i;
Print("{");
indentlevel++;
for (i=0; i<statements.size(); i++)
statements.elementAt(i).Accept(this);
indentlevel--;
Print("}");
return null;
}
public Object VisitUnaryOperatorExpression(ASTUnaryOperatorExpression operator) {
Print(ASTUnaryOperatorExpression.names[operator.operator()]);
indentlevel++;
operator.operand().Accept(this);
indentlevel--;
return null;
}
public Object VisitInstanceVariableDef(ASTInstanceVariableDef variabledef) {
String array = "";
for (int i = 0; i < variabledef.arraydimension();i++) {
array = array + "[]";
}
Print(variabledef.type() + " " + variabledef.name() + array);
return null;
}
public Object VisitInstanceVariableDefs(ASTInstanceVariableDefs variabledefs) {
int i;
for (i=0; i<variabledefs.size(); i++) {
variabledefs.elementAt(i).Accept(this);
}
return null;
}
public Object VisitVariableExpression(ASTVariableExpression variableexpression) {
variableexpression.variable().Accept(this);
return null;
}
public Object VisitWhileStatement(ASTWhileStatement whilestatement) {
Print("While (test/body)");
indentlevel++;
whilestatement.test().Accept(this);
whilestatement.body().Accept(this);
indentlevel--;
return null;
}
public Object VisitVariableDefStatement(ASTVariableDefStatement variabledef) {
String array = "";
for (int i = 0; i < variabledef.arraydimension();i++) {
array = array + "[]";
}
Print(variabledef.type() + " " + variabledef.name() + array);
indentlevel++;
if (variabledef.init() != null) {
variabledef.init().Accept(this);
}
indentlevel--;
return null;
}
}