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use std::fmt::Display;
use super::{Expression, Statement, Value};
impl<'a> Display for Statement<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{{")?;
let value = match self {
Statement::Val {
identifier,
initializer,
} => format!("val {} {}", identifier.lexeme, initializer),
Statement::Var {
identifier,
initializer,
} => format!("var {} {}", identifier.lexeme, initializer),
Statement::Expression { expr } => expr.to_string(),
};
write!(f, "{value}")?;
write!(f, "}}")?;
Ok(())
}
}
impl<'a> Display for Expression<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "(")?;
let value = match self {
Expression::Literal(value) => value.0.to_string(),
Expression::Unary { expr, .. } => format!("+ {}", expr),
Expression::Binary { lhs, rhs, .. } => format!("+ {lhs} {rhs}"),
};
write!(f, "{value}")?;
write!(f, ")")?;
Ok(())
}
}
impl Display for Value {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.0)
}
}
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