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 repeat(runtime: &mut Runtime, executable: &ExecutableLine) -> Result<()> {
    let p1 = param_to_datatype(runtime, executable.params.first(), executable.line_number)?;
    let p2 = param_to_datatype(runtime, executable.params.get(1), executable.line_number)?;

    let p1 = p1.to_string();
    let mut result = String::new();
    if let DataType::Int(x) = p2 {
        for _ in 0..(*x) {
            result.push_str(p1.as_str());
        }
    } else {
        return Err(ChapError::runtime_with_msg(
            executable.line_number,
            "repeat function second param should be int".to_string(),
        ));
    }

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