From 45d75bb5523acd5f51aba70a2ebac0b093185dfc Mon Sep 17 00:00:00 2001
From: John <j@soft.fish>
Date: Mon, 22 Apr 2024 21:44:12 -0500
Subject: [PATCH] cl-structures: Make Span and Loc functions const (now you can
 make a const Span!)

---
 compiler/cl-structures/src/span.rs | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/compiler/cl-structures/src/span.rs b/compiler/cl-structures/src/span.rs
index 8f03b38..3ecc132 100644
--- a/compiler/cl-structures/src/span.rs
+++ b/compiler/cl-structures/src/span.rs
@@ -8,24 +8,33 @@ pub struct Span {
     pub head: Loc,
     pub tail: Loc,
 }
-pub fn Span(head: Loc, tail: Loc) -> Span {
+pub const fn Span(head: Loc, tail: Loc) -> Span {
     Span { head, tail }
 }
 
+impl Span {
+    pub const fn dummy() -> Self {
+        Span { head: Loc::dummy(), tail: Loc::dummy() }
+    }
+}
+
 /// Stores a read-only (line, column) location in a token stream
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct Loc {
     line: u32,
     col: u32,
 }
-pub fn Loc(line: u32, col: u32) -> Loc {
+pub const fn Loc(line: u32, col: u32) -> Loc {
     Loc { line, col }
 }
 impl Loc {
-    pub fn line(self) -> u32 {
+    pub const fn dummy() -> Self {
+        Loc { line: 0, col: 0 }
+    }
+    pub const fn line(self) -> u32 {
         self.line
     }
-    pub fn col(self) -> u32 {
+    pub const fn col(self) -> u32 {
         self.col
     }
 }