Method maybe_child

src/expr-parser/src/parser.rs:1625–1636

(&self)

        }

        fn maybe_child(&self) -> syn::Result<()> {
            let start = self.stream.span().start();
            if start.line <= self.parent.line {
                let msg = format!("child expected at line > {}", self.parent.line);
                Err(Error::new(self.stream.span(), msg))?
            }
            if start.column != self.parent.column + 2 {
                let msg = format!("child expected at column {}", self.parent.column + 2);
                Err(Error::new(self.stream.span(), msg))?
            }
            Ok(())
        }
    }
}