p2sh 0.4.3

The p2sh Programming language interpreter
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use std::fmt;

pub mod expr;
pub mod stmt;

use stmt::*;

#[derive(Default)]
pub struct Program {
    pub statements: Vec<Statement>,
}

impl Program {
    #[allow(dead_code)]
    fn token_literal(&self) -> String {
        if self.statements.is_empty() {
            "".to_string()
        } else {
            self.statements[0].token_literal()
        }
    }
}

impl fmt::Display for Program {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        for s in &self.statements {
            write!(f, "{}", s)?;
        }
        Ok(())
    }
}

impl fmt::Debug for Program {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        for s in &self.statements {
            writeln!(f, "{:?}", s)?;
        }
        Ok(())
    }
}