From c15091291a83789a762b5dfd3307fdb34f41f607 Mon Sep 17 00:00:00 2001
From: Guillaume Desmottes <guillaume.desmottes@collabora.com>
Date: Tue, 16 Mar 2021 11:08:43 +0100
Subject: [PATCH] add Expression::original()

My parser is storing an Expression and may have to retrieve the original
string later when producing errors.
---
 src/expr/mod.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/expr/mod.rs b/src/expr/mod.rs
index 271056c..e747d8d 100644
--- a/src/expr/mod.rs
+++ b/src/expr/mod.rs
@@ -519,6 +519,21 @@ impl Expression {
 
         result_stack.pop().unwrap()
     }
+
+    /// The original string which has been parsed to produce this ['Expression`].
+    ///
+    /// ```
+    /// use cfg_expr::Expression;
+    ///
+    /// assert_eq!(
+    ///     Expression::parse("any()").unwrap().original(),
+    ///     "any()"
+    /// );
+    /// ```
+    #[inline]
+    pub fn original(&self) -> &str {
+        &self.original
+    }
 }
 
 /// [`PartialEq`] will do a **syntactical** comparaison, so will just check if both