tla-checker 0.3.9

A TLA+ model checker written in Rust
Documentation 
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Default)]
pub struct Span {
    pub start: u32,
    pub end: u32,
}

impl Span {
    pub const fn new(start: u32, end: u32) -> Self {
        Self { start, end }
    }

    pub const fn empty() -> Self {
        Self { start: 0, end: 0 }
    }

    pub fn merge(self, other: Span) -> Span {
        Span {
            start: self.start.min(other.start),
            end: self.end.max(other.end),
        }
    }

    pub fn is_empty(self) -> bool {
        self.start == self.end
    }

    pub fn len(self) -> u32 {
        self.end.saturating_sub(self.start)
    }
}

#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Spanned<T> {
    pub value: T,
    pub span: Span,
}

impl<T> Spanned<T> {
    pub fn new(value: T, span: Span) -> Self {
        Self { value, span }
    }

    pub fn map<U>(self, f: impl FnOnce(T) -> U) -> Spanned<U> {
        Spanned {
            value: f(self.value),
            span: self.span,
        }
    }
}