From 1baebacc7f8541ed7077b12b3f8989255ec290fe Mon Sep 17 00:00:00 2001
From: Daniel Schadt <kingdread@gmx.de>
Date: Mon, 27 Apr 2020 15:30:07 +0200
Subject: remove try_trait

The .ok_or() method on Option is enough for those two occasions that we
don't need to activate the complete try_trait feature just for a very
small and questionable ergonomics gain. This also allows us to more
easily discern which data exactly was invalid, as the .ok_or() in
different places could take different error values.

This also allows evtclib to be used on stable now.

Some noise is introduced in the diff due to automatically re-formatting
the source.
---
 src/lib.rs        |  1 -
 src/raw/parser.rs | 29 ++++++++++++-----------------
 2 files changed, 12 insertions(+), 18 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index c2272cf..891e387 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -16,7 +16,6 @@
 //!
 //! (Look at the note on "Buffering" in the [parser
 //! module](raw/parser/index.html#buffering))
-#![feature(try_trait)]
 
 use thiserror::Error;
 use getset::Getters;
diff --git a/src/raw/parser.rs b/src/raw/parser.rs
index 0e91f78..5544fd2 100644
--- a/src/raw/parser.rs
+++ b/src/raw/parser.rs
@@ -65,8 +65,8 @@
 
 use byteorder::{LittleEndian, ReadBytesExt, LE};
 use num_traits::FromPrimitive;
-use thiserror::Error;
 use std::io::{self, ErrorKind, Read};
+use thiserror::Error;
 
 use super::*;
 
@@ -124,12 +124,6 @@ pub enum ParseError {
     InvalidZip(#[from] zip::result::ZipError),
 }
 
-impl From<std::option::NoneError> for ParseError {
-    fn from(_: std::option::NoneError) -> Self {
-        ParseError::InvalidData
-    }
-}
-
 /// A type indicating the parse result.
 pub type ParseResult<T> = Result<T, ParseError>;
 
@@ -254,13 +248,18 @@ pub fn parse_skill<T: Read>(input: &mut T) -> ParseResult<Skill> {
 ///
 /// * `input` - Input stream.
 /// * `parser` - The parse function to use.
-pub fn parse_events<T: Read>(input: &mut T, parser: fn(&mut T) -> ParseResult<CbtEvent>) -> ParseResult<Vec<CbtEvent>> {
+pub fn parse_events<T: Read>(
+    input: &mut T,
+    parser: fn(&mut T) -> ParseResult<CbtEvent>,
+) -> ParseResult<Vec<CbtEvent>> {
     let mut result = Vec::new();
     loop {
         let event = parser(input);
         match event {
             Ok(x) => result.push(x),
-            Err(ParseError::Io(ref e)) if e.kind() == ErrorKind::UnexpectedEof => return Ok(result),
+            Err(ParseError::Io(ref e)) if e.kind() == ErrorKind::UnexpectedEof => {
+                return Ok(result)
+            }
             Err(e) => return Err(e),
         }
     }
@@ -295,7 +294,8 @@ pub fn parse_event_rev0<T: Read>(input: &mut T) -> ParseResult<CbtEvent> {
     let is_ninety = input.read_u8()? != 0;
     let is_fifty = input.read_u8()? != 0;
     let is_moving = input.read_u8()? != 0;
-    let is_statechange = CbtStateChange::from_u8(input.read_u8()?)?;
+    let is_statechange =
+        CbtStateChange::from_u8(input.read_u8()?).ok_or(ParseError::InvalidData)?;
     let is_flanking = input.read_u8()? != 0;
     let is_shields = input.read_u8()? != 0;
 
@@ -355,7 +355,8 @@ pub fn parse_event_rev1<T: Read>(input: &mut T) -> ParseResult<CbtEvent> {
     let is_ninety = input.read_u8()? != 0;
     let is_fifty = input.read_u8()? != 0;
     let is_moving = input.read_u8()? != 0;
-    let is_statechange = CbtStateChange::from_u8(input.read_u8()?)?;
+    let is_statechange =
+        CbtStateChange::from_u8(input.read_u8()?).ok_or(ParseError::InvalidData)?;
     let is_flanking = input.read_u8()? != 0;
     let is_shields = input.read_u8()? != 0;
     let is_offcycle = input.read_u8()? != 0;
@@ -390,8 +391,6 @@ pub fn parse_event_rev1<T: Read>(input: &mut T) -> ParseResult<CbtEvent> {
     })
 }
 
-
-
 /// Parse a partial EVTC file.
 ///
 /// * `input` - Input stream.
@@ -409,8 +408,6 @@ pub fn parse_partial_file<T: Read>(input: &mut T) -> ParseResult<PartialEvtc> {
     })
 }
 
-
-
 /// Finish a partial EVTC by reading the events.
 ///
 /// * `partial` - The partial EVTC.
@@ -431,8 +428,6 @@ pub fn finish_parsing<T: Read>(partial: PartialEvtc, input: &mut T) -> ParseResu
     })
 }
 
-
-
 /// Parse a complete EVTC file.
 ///
 /// * `input` - Input stream.
-- 
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