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use gtmpl_value::{Number, Value}; pub fn has(args: &[Value]) -> Result<Value, String> { Ok(Value::Bool(match args.get(0) { Some(Value::Bool(b)) => *b, Some(Value::Number(n)) => (*n) >= Number::from(0), Some(Value::NoValue) | Some(Value::Nil) => false, Some(Value::String(s)) => s.len() != 0, Some(Value::Array(a)) => a.len() != 0, Some(Value::Map(m)) => m.len() != 0, _ => return Err("First Expr must be boolable".to_string()), })) } pub fn first(args: &[Value]) -> Result<Value, String> { for a in args { match a { Value::NoValue | Value::Nil => {} v => return Ok(v.clone()), } } return Err("No Value wasn't null".to_string()); } pub fn b_sel(args: &[Value]) -> Result<Value, String> { let b_val = match args.get(0) { Some(Value::Bool(b)) => *b, Some(Value::Number(n)) => (*n) >= Number::from(0), Some(Value::NoValue) | Some(Value::Nil) => false, Some(Value::String(s)) => s.len() != 0, Some(Value::Array(a)) => a.len() != 0, Some(Value::Map(m)) => m.len() != 0, _ => return Err("First Expr must be boolable".to_string()), }; if b_val { return args .get(1) .map(|m| m.clone()) .ok_or("Ok Expression not supplied".to_string()); } Ok(args .get(2) .map(|v| v.clone()) .unwrap_or(Value::String(String::new()))) } pub fn v_match(args: &[Value]) -> Result<Value, String> { if args.len() <= 3 { return Err("match requires at least three args".to_string()); } let mut it = args[1..].iter(); while let Some(n) = it.next() { if n == &args[0] || n == &Value::String("$else".to_string()) { return it .next() .map(|m| m.clone()) .ok_or("Match doesn't have valid response".to_string()); } it.next(); } Err("match not found".to_string()) }