ast_decl.cc

编译原理课程设计之pp2语法分析程序

/* File: ast_decl.cc
 * -----------------
 * Implementation of Decl node classes.
 */
#include "ast_decl.h"
#include "ast_type.h"
#include "ast_stmt.h"
        
         
Decl::Decl(Identifier *n) : Node(*n->GetLocation()) {
    Assert(n != NULL);
    (id=n)->SetParent(this); 
}


VarDecl::VarDecl(Identifier *n, Type *t) : Decl(n) {
    Assert(n != NULL && t != NULL);
    (type=t)->SetParent(this);
}
  
void VarDecl::PrintChildren(int indentLevel) { 
   type->Print(indentLevel+1);
   id->Print(indentLevel+1);
}

ClassDecl::ClassDecl(Identifier *n, NamedType *ex, List<Decl*> *m) : Decl(n) {
    // extends can be NULL, impl & mem may be empty lists but cannot be NULL
    Assert(n != NULL && m != NULL);     
    extends = ex;
    if (extends) extends->SetParent(this);
    //(implements=imp)->SetParentAll(this);
    (members=m)->SetParentAll(this);
}

void ClassDecl::PrintChildren(int indentLevel) {
    id->Print(indentLevel+1);
    if (extends) extends->Print(indentLevel+1, "(extends) ");
    //implements->PrintAll(indentLevel+1, "(implements) ");
    members->PrintAll(indentLevel+1);
}


/*
InterfaceDecl::InterfaceDecl(Identifier *n, List<Decl*> *m) : Decl(n) {
    Assert(n != NULL && m != NULL);
    (members=m)->SetParentAll(this);
}

void InterfaceDecl::PrintChildren(int indentLevel) {
    id->Print(indentLevel+1);
    members->PrintAll(indentLevel+1);
}
*/	
FnDecl::FnDecl(Identifier *n, Type *r, List<VarDecl*> *d) : Decl(n) {
    Assert(n != NULL && r!= NULL && d != NULL);
    (returnType=r)->SetParent(this);
    (formals=d)->SetParentAll(this);
    body = NULL;
}

void FnDecl::SetFunctionBody(Stmt *b) { 
    (body=b)->SetParent(this);
}

void FnDecl::PrintChildren(int indentLevel) {
    returnType->Print(indentLevel+1, "(return type) ");
    id->Print(indentLevel+1);
    formals->PrintAll(indentLevel+1, "(formals) ");
    if (body) body->Print(indentLevel+1, "(body) ");
}