question about creating an overflow detector ?

[malawadd]

so if I wanted to find all the version of solidity 0.7 or 0.6 or 0.5 I can do this

  for pragma_directive in context.pragma_directives() {
        for literal in &pragma_directive.literals {
            if literal.contains("0.7") || literal.contains("0.6") || literal.contains("0.5") {
                capture!(self, context, pragma_directive);
                break;
            }
        }
    }

and if i wanted to find all the adding operations I can do this

for op in context
            .assignments()
            .iter()
            .filter(|op| op.operator == "+=")
        {
            capture!(self, context, op)
        }

now why when i combine both like this, it doesnt work, what am i missing here

for _op in context.assignments().iter() {
            for pragma_directive in context.pragma_directives() {
                for literal in &pragma_directive.literals {
                    if literal.contains("0.7") || literal.contains("0.6") || literal.contains("0.5")
                    {
                        if let Some(addition) = context
                            .assignments()
                            .iter()
                            .find(|op| op.operator == "+=" || op.operator == "+")
                        {
                            capture!(self, context, addition);
                        }
                        if let Some(substraction) = context
                            .assignments()
                            .iter()
                            .find(|op| op.operator == "-=" || op.operator == "-")
                        {
                            capture!(self, context, substraction);
                        }
                    }
                }
            }
        }