default_value.cpp

#include "ast/default_value.h"
#include "ast/type.h"
#include "ast/decl.h"
 
using namespace tanlang;
 
Literal *DefaultValue::CreateTypeDefaultValueLiteral(TokenizedSourceFile *src, Type *type) {
  Literal *ret = nullptr;
 
  if (type->is_pointer()) {
    ret = Literal::CreateNullPointerLiteral(src, pcast<PointerType>(type)->get_pointee());
 
  } else if (type->is_array()) {
    ArrayType *at = pcast<ArrayType>(type);
    Type *element_type = at->get_element_type();
    size_t size = (size_t)at->array_size();
 
    vector<Literal *> elements(size);
    for (uint32_t i = 0; i < size; ++i) {
      elements[i] = DefaultValue::CreateTypeDefaultValueLiteral(src, element_type);
    }
 
    ret = Literal::CreateArrayLiteral(src, element_type, elements);
 
  } else if (type->is_string()) {
    ret = Literal::CreateStringLiteral(src, "");
 
  } else if (type->is_struct()) {
    // TODO: IMPLEMENT THIS
 
  } else if (type->is_function()) {
    // TODO: IMPLEMENT THIS
 
  } else if (type->is_float()) {
    ret = Literal::CreateFloatLiteral(src, 0, (size_t)type->get_size_bits());
 
  } else if (type->is_int()) {
    ret = Literal::CreateIntegerLiteral(src, 0, (size_t)type->get_size_bits(), type->is_unsigned());
 
  } else if (type->is_bool()) {
    ret = Literal::CreateBoolLiteral(src, false);
 
  } else if (type->is_char()) {
    ret = Literal::CreateCharLiteral(src, '\0');
  }
 
  TAN_ASSERT(ret);
  return ret;
}