brainfuck interpreter
brainfuck
cli
rust
evaluator: created relevant error for input overflow during runtim
+18
-16
+18
-16
src/evaluator.rs
+18
-16
src/evaluator.rs
···
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54
},
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#[diagnostic(
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+
code(tachyon::runtime::read_overflow),
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help("change cell overflow behavior to wrap")
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+
)]
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+
ReadOverflow {
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+
#[source_code]
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src: NamedSource<Arc<str>>,
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+
#[label("read overflowed here")]
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+
span: SourceSpan,
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+
},
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+
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+
#[diagnostic(
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code(tachyon::runtime::invalid_token),
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help("this is a bug with the tokenizer. please report it!"),
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70
url("https://tangled.org/digi.rip/tachyon/issues")
···
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98
RuntimeError::DataPointerNegative { .. } => {
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write!(f, "data pointer moved past start of tape")
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100
}
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-
RuntimeError::CellUnderflow { .. } => {
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-
write!(f, "cell value went below 0")
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-
}
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-
RuntimeError::CellOverflow { .. } => {
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-
write!(f, "cell value went over 255")
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-
}
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-
RuntimeError::InvalidToken { .. } => {
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-
write!(f, "invalid token found")
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-
}
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-
RuntimeError::IoReadError { err, .. } => {
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write!(f, "failed to read input: {}", err)
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-
}
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-
RuntimeError::IoWriteError { err, .. } => {
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-
write!(f, "failed to write output: {}", err)
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-
}
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+
RuntimeError::CellUnderflow { .. } => write!(f, "cell value went below 0"),
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+
RuntimeError::CellOverflow { .. } => write!(f, "cell value went over 255"),
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+
RuntimeError::ReadOverflow { .. } => write!(f, "user broke overflow rule during input"),
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+
RuntimeError::InvalidToken { .. } => write!(f, "invalid token found"),
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+
RuntimeError::IoReadError { err, .. } => write!(f, "failed to read input: {}", err),
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+
RuntimeError::IoWriteError { err, .. } => write!(f, "failed to write output: {}", err),
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}
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}
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}
···
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370
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match buffer.parse::<u16>() {
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Ok(val) if val > 255 && self.cell_oob == OOBBehavior::Error => {
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-
return Err(RuntimeError::CellOverflow {
373
+
return Err(RuntimeError::ReadOverflow {
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src: NamedSource::new(Arc::clone(&self.filename), Arc::clone(&self.source)),
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span: (current.offset, 1).into(),
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376
});