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//! code generation for trashcan modules

use std::io;
use std::io::Write;

use ast::*;
use super::*;
use analysis::SymbolTable;

impl Emit<()> for Module {
    fn emit<W: Write>(&self, out: &mut W, symtab: &SymbolTable,
      _ctxt: (), indent: u32) -> io::Result<()> {
        match self.data {
            ModuleKind::Normal(ref items) => {
                write_normal_header(&self.name, out, symtab, indent)?;
                for (i, item) in items.iter().enumerate() {
                    if i != 0 {
                        out.write_all(b"\n")?;
                    }
                    item.emit(out, symtab, (), indent)?;
                }
                Ok(())
            },
        }
    }
}

fn write_normal_header<W: Write>(name: &Ident, out: &mut W,
  symtab: &SymbolTable, indent: u32) -> io::Result<()> {
    write!(out, "{:in$}Attribute VB_Name = \"", "",
      in = (indent * INDENT) as usize)?;
    name.emit(out, symtab, (), 0)?; 
    out.write_all(b"\"\nOption Explicit\n\n")
}