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use std::fs::read_to_string;
mod ast;
use ast::*;
mod parser;
use parser::*;
pub fn run(arg: &str) -> String {
let content = read_to_string(arg).unwrap();
let result = interpret(&content.to_string());
result.to_string()
}
fn interpret(arg: &str) -> Value {
// interpreting a value is the value itself
parse(arg)
}
#[cfg(test)]
mod tests {
use super::interpret;
use super::Value::*;
use proptest::prelude::*;
proptest! {
#[test]
fn interpret_integer_as_number(i in -1000i32..1000) {
let result = interpret(&i.to_string());
assert_eq!(Num(i), result);
}
}
#[test]
fn interpret_truth_values_as_booleans() {
assert_eq!(Bool(true), interpret("true"));
assert_eq!(Bool(false), interpret("false"));
}
#[test]
fn interpret_identifiers_values_as_symbols() {
assert_eq!(Sym("foo".to_string()), interpret("foo"));
}
#[test]
fn ignores_whitespace() {
assert_eq!(Sym("foo".to_string()), interpret(" foo \n\r"));
assert_eq!(Num(-42), interpret("\n-42"));
}
}
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