openscad-rs 0.1.0

A high-performance OpenSCAD parser library for Rust
Documentation 
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//! Source location tracking for AST nodes.
//! Every AST node carries a `Span` so tools can map back to exact source positions.

/// A byte-offset range in source code.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct Span {
    /// Byte offset of the start (inclusive).
    pub start: usize,
    /// Byte offset of the end (exclusive).
    pub end: usize,
}

impl Span {
    #[must_use]
    pub const fn new(start: usize, end: usize) -> Self {
        Self { start, end }
    }

    /// Create a span that covers from the start of `self` to the end of `other`.
    #[must_use]
    pub const fn merge(self, other: Self) -> Self {
        Self {
            start: if self.start < other.start {
                self.start
            } else {
                other.start
            },
            end: if self.end > other.end {
                self.end
            } else {
                other.end
            },
        }
    }

    #[must_use]
    pub const fn len(self) -> usize {
        self.end - self.start
    }

    #[must_use]
    pub const fn is_empty(self) -> bool {
        self.start == self.end
    }

    /// Dummy span for synthetic nodes.
    pub const DUMMY: Self = Self { start: 0, end: 0 };
}

impl From<logos::Span> for Span {
    fn from(span: logos::Span) -> Self {
        Self {
            start: span.start,
            end: span.end,
        }
    }
}