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package st;
import syntaxtree.*;
import visitor.*;
import java.util.*;
import misc.*;
/**
* Performs a bottom-up preliminary visit through the AST
* initializing all Instances and placing them in the passed ST
*/
public class SymTableMethods<R> extends GJDepthFirst<R,SymbolTable> {
/**
* f0 -> "class"
* f1 -> Identifier()
* f2 -> "{"
* f3 -> "public"
* f4 -> "static"
* f5 -> "void"
* f6 -> "main"
* f7 -> "("
* f8 -> "String"
* f9 -> "["
* f10 -> "]"
* f11 -> Identifier()
* f12 -> ")"
* f13 -> "{"
* f14 -> ( VarDeclaration() )*
* f15 -> ( Statement() )*
* f16 -> "}"
* f17 -> "}"
*/
public R visit(MainClass n, SymbolTable symt) {
String act = n.f1.f0.tokenImage;
symt.setActive(TypeEnum.classname, symt.getClass(act));
n.f0.accept(this, symt);
n.f1.accept(this, symt);
n.f2.accept(this, symt);
n.f3.accept(this, symt);
n.f4.accept(this, symt);
n.f5.accept(this, symt);
n.f6.accept(this, symt);
n.f7.accept(this, symt);
n.f8.accept(this, symt);
n.f9.accept(this, symt);
n.f10.accept(this, symt);
n.f11.accept(this, symt);
n.f12.accept(this, symt);
n.f13.accept(this, symt);
n.f14.accept(this, symt);
n.f15.accept(this, symt);
n.f16.accept(this, symt);
n.f17.accept(this, symt);
TokenKey id = new TokenKey(n.f6.tokenImage, TypeEnum.method, (ClassInstance) symt.getActive(TypeEnum.classname), null);
MethodInstance main = new MethodInstance(id.getName(), null, (ClassInstance) symt.getActive(TypeEnum.classname));
symt.put(id, main);
symt.removeActive(TypeEnum.classname);
return null;
}
/**
* f0 -> "class"
* f1 -> Identifier()
* f2 -> "{"
* f3 -> ( VarDeclaration() )*
* f4 -> ( MethodDeclaration() )*
* f5 -> "}"
*/
public R visit(ClassDeclaration n, SymbolTable symt) {
String act = n.f1.f0.tokenImage;
symt.setActive(TypeEnum.classname, symt.getClass(act));
n.f0.accept(this, symt);
n.f1.accept(this, symt);
n.f2.accept(this, symt);
n.f3.accept(this, symt);
n.f4.accept(this, symt);
n.f5.accept(this, symt);
symt.removeActive(TypeEnum.classname);
return null;
}
/**
* f0 -> "class"
* f1 -> Identifier()
* f2 -> "extends"
* f3 -> Identifier()
* f4 -> "{"
* f5 -> ( VarDeclaration() )*
* f6 -> ( MethodDeclaration() )*
* f7 -> "}"
*/
public R visit(ClassExtendsDeclaration n, SymbolTable symt) {
String act = n.f1.f0.tokenImage;
symt.setActive(TypeEnum.classname, symt.getClass(act));
n.f0.accept(this, symt);
n.f1.accept(this, symt);
n.f2.accept(this, symt);
n.f3.accept(this, symt);
n.f4.accept(this, symt);
n.f5.accept(this, symt);
n.f6.accept(this, symt);
n.f7.accept(this, symt);
symt.removeActive(TypeEnum.classname);
return null;
}
/**
* f0 -> "public"
* f1 -> Type()
* f2 -> Identifier()
* f3 -> "("
* f4 -> ( FormalParameterList() )?
* f5 -> ")"
* f6 -> "{"
* f7 -> ( VarDeclaration() )*
* f8 -> ( Statement() )*
* f9 -> "return"
* f10 -> Expression()
* f11 -> ";"
* f12 -> "}"
*/
public R visit(MethodDeclaration n, SymbolTable symt) {
n.f0.accept(this, symt);
n.f1.accept(this, symt);
n.f2.accept(this, symt);
n.f3.accept(this, symt);
n.f4.accept(this, symt);
n.f5.accept(this, symt);
n.f6.accept(this, symt);
n.f7.accept(this, symt);
n.f8.accept(this, symt);
n.f9.accept(this, symt);
n.f10.accept(this, symt);
n.f11.accept(this, symt);
n.f12.accept(this, symt);
TokenKey id = new TokenKey(n.f2.f0.tokenImage, TypeEnum.method, (ClassInstance) symt.getActive(TypeEnum.classname), null);
ClassInstance rtrn = null;
switch (n.f1.f0.which) {
case 0:
rtrn = new ClassInstance("intarray"); break;
case 1:
rtrn = new ClassInstance("bool"); break;
case 2:
rtrn = new ClassInstance("int"); break;
case 3:
rtrn = symt.getClass(((Identifier) n.f1.f0.choice).f0.tokenImage); break;
default:
MinimalLogger.severe("Unsupported case");
}
MethodInstance instance = new MethodInstance(id.getName(), rtrn, (ClassInstance) symt.getActive(TypeEnum.classname));
symt.put(id, instance);
return null;
}
}
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