Add constant NO_POS.

2020-11-02 12:50:27 +08:00
parent 6f3ce96d9d
commit d7d6f74dfd
29 changed files with 253 additions and 292 deletions
--- a/src/token.rs
+++ b/src/token.rs
@@ -44,6 +44,9 @@ pub struct Position {
    pos: u16,
 }

+/// No `Position`.
+pub const NO_POS: Position = Position { line: 0, pos: 0 };
+
 impl Position {
    /// Create a new `Position`.
    ///
@@ -121,7 +124,7 @@ impl Position {
    /// Create a `Position` representing no position.
    #[inline(always)]
    pub fn none() -> Self {
-        Self { line: 0, pos: 0 }
+        NO_POS
    }

    /// Is there no `Position`?