[librsvg: 32/43] Convert morphology::Operator to CssParseError

[Federico Mena Quintero <federico src gnome org>]

commit 49c3447ebf84a3f23aa434c3aabe8ea7405f1e49
Author: Federico Mena Quintero <federico gnome org>
Date:   Fri Dec 20 18:31:50 2019 -0600

    Convert morphology::Operator to CssParseError

 rsvg_internals/src/filters/morphology.rs | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)
---
diff --git a/rsvg_internals/src/filters/morphology.rs b/rsvg_internals/src/filters/morphology.rs
index a0f9a63a..2b33b70f 100644
--- a/rsvg_internals/src/filters/morphology.rs
+++ b/rsvg_internals/src/filters/morphology.rs
@@ -7,7 +7,7 @@ use markup5ever::{expanded_name, local_name, namespace_url, ns};
 use crate::drawing_ctx::DrawingCtx;
 use crate::error::*;
 use crate::node::{NodeResult, NodeTrait, RsvgNode};
-use crate::parsers::{NumberOptionalNumber, Parse, ParseValue, ParseValueToParseError};
+use crate::parsers::{NumberOptionalNumber, ParseToParseError, ParseValueToParseError};
 use crate::property_bag::PropertyBag;
 use crate::rect::IRect;
 use crate::surface_utils::{
@@ -52,7 +52,7 @@ impl NodeTrait for FeMorphology {
 
         for (attr, value) in pbag.iter() {
             match attr.expanded() {
-                expanded_name!(svg "operator") => self.operator = attr.parse(value)?,
+                expanded_name!(svg "operator") => self.operator = attr.parse_to_parse_error(value)?,
                 expanded_name!(svg "radius") => {
                     let NumberOptionalNumber(x, y) = attr.parse_to_parse_error_and_validate(
                         value,
@@ -161,13 +161,12 @@ impl FilterEffect for FeMorphology {
     }
 }
 
-impl Parse for Operator {
-    fn parse<'i>(parser: &mut Parser<'i, '_>) -> Result<Operator, ValueErrorKind> {
-        parse_identifiers!(
+impl ParseToParseError for Operator {
+    fn parse_to_parse_error<'i>(parser: &mut Parser<'i, '_>) -> Result<Self, CssParseError<'i>> {
+        Ok(parse_identifiers!(
             parser,
             "erode" => Operator::Erode,
             "dilate" => Operator::Dilate,
-        )
-        .map_err(|_| ValueErrorKind::parse_error("parse error"))
+        )?)
     }
 }