chap 2.5.0

Chap is an easy to learn, interpretive, scripting language written in Rust
Documentation 
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use crate::builtin_function::utils::{param_to_datatype, returns};
use crate::common::data_type::DataType;
use crate::common::errors::{ChapError, Result};
use crate::{common::executable::ExecutableLine, runtime::Runtime};

pub fn not(runtime: &mut Runtime, executable: &ExecutableLine) -> Result<()> {
    let p1 = param_to_datatype(runtime, executable.params.first(), executable.line_number)?;

    let result = match p1 {
        DataType::Bool(x) => !x,
        _ => {
            return Err(ChapError::runtime_with_msg(
                executable.line_number,
                "not function needs bool params".to_string(),
            ));
        }
    };

    returns(runtime, executable, DataType::Bool(result))
}