Method exec

core/tests/testutils/callables/concat_fn.rs:53–80

(&self, scope: Scope<'_>)

    }

    fn exec(&self, scope: Scope<'_>) -> CallResult<()> {
        let mut result = String::new();
        let mut reg = 0;
        loop {
            let sep = match scope.get_type(reg) {
                VarArgTag::Immediate(sep, etype) => {
                    reg += 1;
                    match etype {
                        ExprType::Text => result.push_str(scope.get_string(reg)),
                        _ => {
                            return Err(CallError::Argument(
                                "Only accepts string values".to_owned(),
                            ));
                        }
                    }
                    sep
                }

                _ => return Err(CallError::Argument("Only accepts string values".to_owned())),
            };
            reg += 1;

            if sep == ArgSep::End {
                break;
            }
        }
        scope.return_string(result)
    }
}