[librsvg: 3/43] Introduce a ParseError enum, temporarily with variants for CssParseError and ValueErrorKind

[Federico Mena Quintero <federico src gnome org>]

commit 64e292e223cf4d273f6bbfaf7772a25f29457308
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Dec 19 18:19:04 2019 -0600

    Introduce a ParseError enum, temporarily with variants for CssParseError and ValueErrorKind
    
    This will let us convert all parsers gradually to CssParseError, and
    eventually rename that to just ParseError.

 rsvg_internals/src/error.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
---
diff --git a/rsvg_internals/src/error.rs b/rsvg_internals/src/error.rs
index 73aecb46..90c028b2 100644
--- a/rsvg_internals/src/error.rs
+++ b/rsvg_internals/src/error.rs
@@ -22,6 +22,23 @@ use crate::node::RsvgNode;
 /// purpose.
 pub type CssParseError<'i> = cssparser::ParseError<'i, ValueErrorKind>;
 
+pub enum ParseError<'i> {
+    P(CssParseError<'i>),
+    V(ValueErrorKind),
+}
+
+impl<'i> From<CssParseError<'i>> for ParseError<'i> {
+    fn from(p: CssParseError<'i>) -> ParseError {
+        ParseError::P(p)
+    }
+}
+
+impl<'i> From<ValueErrorKind> for ParseError<'i> {
+    fn from (v: ValueErrorKind) -> ParseError<'i> {
+        ParseError::V(v)
+    }
+}
+
 /// A simple error which refers to an attribute's value
 #[derive(Debug, Clone, PartialEq)]
 pub enum ValueErrorKind {