/*
    NOTE: YOU MUST IMPLEMENT empty() FOR P8.  IF YOU FORGET TO 
    IMPLEMENT IT YOUR ANIMATIONS WON'T WORK AND IT WILL BE HARD TO 
    FIGURE OUT WHY.

    YOU SHOULD IMPLEMENT empty() WHEN YOU WRITE THE CODE TO INSERT 
    STATEMENTS INTO A STATEMENT BLOCK (P7). 

*/
#include "statement_block.h"
#include "gpl_assert.h"


Statement_block::Statement_block(int block_line)
{
    m_line = block_line;

}

// Return true if this statement_block has no statements, false otherwise
// Implement this function for p7
bool Statement_block::empty()
{
    // This function MUST be defined for p7
    // If you forget to define it, none of your animations will work
    return true;
}

// this function is called for all non-animation_block statement_blocks
// Implement it for p7
void Statement_block::execute()
{
    // This function should be defined before it is ever called
    // This assert will cause the program to abort if this function 
    // is called before it is implemented.

    // *** ==> Remove this assert when you implement this function
    assert(false);
}

ostream &
Statement_block::print(ostream &os) const
{
    os << indent << "Statement_block[" << m_line;
    
    os << "]" << endl
       << indent << "{" << endl;
    indent++;
    os << indent << "statement block not implemented yet" << endl;
    indent--;
    os << indent << "}";
    return os;
}


ostream &
operator<<(ostream &os, const Statement_block &statement_block)
{
    return statement_block.print(os);
}

ostream &
operator<<(ostream &os, const Statement_block *statement_block)
{
    if (!statement_block)
    {
        os << indent << "NULL";
        return os;
    }

    return statement_block->print(os);
}