rant 4.0.0-alpha.22

The Rant procedural templating language
Documentation 
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use super::*;

pub(crate) fn assert(vm: &mut VM, (condition, message): (bool, Option<String>)) -> RantStdResult {
  if !condition {
    runtime_error!(RuntimeErrorType::AssertError, "{}", message.as_deref().unwrap_or("assertion failed: condition was false"));
  }
  Ok(())
}

pub(crate) fn assert_eq(vm: &mut VM, (actual, expected, message): (RantValue, RantValue, Option<String>)) -> RantStdResult {
  if expected != actual {
    runtime_error!(RuntimeErrorType::AssertError, "{}", message.unwrap_or_else(|| format!("expected: {}; actual: {}", expected, actual)));
  }
  Ok(())
}

pub(crate) fn assert_neq(vm: &mut VM, (actual, unexpected, message): (RantValue, RantValue, Option<String>)) -> RantStdResult {
  if unexpected == actual {
    runtime_error!(RuntimeErrorType::AssertError, "{}", message.unwrap_or_else(|| format!("unexpected value: {}", unexpected)));
  }
  Ok(())
}