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30 lines
701 B
Rust
30 lines
701 B
Rust
#[derive(Clone, Copy)]
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pub enum Mode {
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Exec,
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Eval,
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Single,
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BlockExpr,
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}
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impl std::str::FromStr for Mode {
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type Err = ModeParseError;
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// To support `builtins.compile()` `mode` argument
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fn from_str(s: &str) -> Result<Self, ModeParseError> {
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match s {
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"exec" => Ok(Mode::Exec),
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"eval" => Ok(Mode::Eval),
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"single" => Ok(Mode::Single),
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_ => Err(ModeParseError(())),
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}
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}
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}
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#[derive(Debug)]
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pub struct ModeParseError(());
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impl std::fmt::Display for ModeParseError {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(f, r#"mode must be "exec", "eval", or "single""#)
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}
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}
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