How to write simple parser for if and while statements? [closed]

Answer 1

In a recursive descent parser it's easy to implement these statements if you have the normal block and expression parsers. In pseudo-code, they are basically:

void ParseIf()
{
  Match("if");
  Match("(");
  ParseExpression();
  Match(")");
  ParseBlock();
}

and

void ParseWhile()
{
  Parse("while");
  Parse("(");
  ParseExpression();
  Parse(")");
  ParseBlock();
}