use anyhow::Error everywhere.

Author: Dirbaio

java-spaghetti-gen/src/emit/classes.rs

@@ -1,5 +1,4 @@
 use std::collections::HashSet;
-use std::error::Error;
 use std::fmt::Write;
 
 use proc_macro2::TokenStream;
@@ -20,7 +19,7 @@ pub(crate) struct StructPaths {
 }
 
 impl StructPaths {
-    pub(crate) fn new(class: Id) -> Result<Self, Box<dyn Error>> {
+    pub(crate) fn new(class: Id) -> Result<Self, anyhow::Error> {
         Ok(Self {
             mod_: Class::mod_for(class)?,
             struct_name: Class::name_for(class)?,
@@ -34,7 +33,7 @@ pub(crate) struct Class {
     pub java: JavaClass,
 }
 
-fn rust_id(id: &str) -> Result<String, Box<dyn Error>> {
+fn rust_id(id: &str) -> Result<String, anyhow::Error> {
     Ok(match RustIdentifier::from_str(id) {
         RustIdentifier::Identifier(id) => id,
         RustIdentifier::KeywordRawSafe(id) => id,
@@ -47,7 +46,7 @@ fn rust_id(id: &str) -> Result<String, Box<dyn Error>> {
 }
 
 impl Class {
-    pub(crate) fn mod_for(class: Id) -> Result<String, Box<dyn Error>> {
+    pub(crate) fn mod_for(class: Id) -> Result<String, anyhow::Error> {
         let mut buf = String::new();
         for component in class {
             match component {
@@ -64,7 +63,7 @@ impl Class {
         Ok(buf)
     }
 
-    pub(crate) fn name_for(class: Id) -> Result<String, Box<dyn Error>> {
+    pub(crate) fn name_for(class: Id) -> Result<String, anyhow::Error> {
         let mut buf = String::new();
         for component in class.iter() {
             match component {
@@ -76,7 +75,7 @@ impl Class {
         Ok(buf)
     }
 
-    pub(crate) fn new(java: JavaClass) -> Result<Self, Box<dyn Error>> {
+    pub(crate) fn new(java: JavaClass) -> Result<Self, anyhow::Error> {
         let rust = StructPaths::new(java.path())?;
 
         Ok(Self { rust, java })

java-spaghetti-gen/src/emit/mod.rs

@@ -10,7 +10,6 @@ mod modules;
 mod preamble;
 
 use std::collections::HashMap;
-use std::error::Error;
 use std::ffi::CString;
 use std::io;
 use std::rc::Rc;
@@ -50,7 +49,7 @@ impl<'a> Context<'a> {
             .unwrap()
     }
 
-    pub fn java_to_rust_path(&self, java_class: parser_util::Id, mod_: &str) -> Result<TokenStream, Box<dyn Error>> {
+    pub fn java_to_rust_path(&self, java_class: parser_util::Id, mod_: &str) -> Result<TokenStream, anyhow::Error> {
         let m = Class::mod_for(java_class)?;
         let s = Class::name_for(java_class)?;
         let fqn = format!("{m}::{s}");
@@ -85,7 +84,7 @@ impl<'a> Context<'a> {
         Ok(res)
     }
 
-    pub fn add_class(&mut self, class: parser_util::JavaClass) -> Result<(), Box<dyn Error>> {
+    pub fn add_class(&mut self, class: parser_util::JavaClass) -> Result<(), anyhow::Error> {
         let cc = self.config.resolve_class(class.path().as_str());
         if !cc.include {
             return Ok(());

java-spaghetti-gen/src/main.rs

@@ -6,7 +6,6 @@ mod emit;
 mod identifiers;
 mod parser_util;
 
-use std::error::Error;
 use std::fs::File;
 use std::io::{self, Read};
 use std::path::{Path, PathBuf};
@@ -17,7 +16,7 @@ use crate::config::Config;
 use crate::parser_util::JavaClass;
 
 /// The core function of this library: Generate Rust code to access Java APIs.
-pub fn run(config: impl Into<Config>) -> Result<(), Box<dyn Error>> {
+pub fn run(config: impl Into<Config>) -> Result<(), anyhow::Error> {
     let config: Config = config.into();
     println!("output: {}", config.output.display());
 
@@ -38,7 +37,7 @@ pub fn run(config: impl Into<Config>) -> Result<(), Box<dyn Error>> {
     Ok(())
 }
 
-fn gather_file(context: &mut emit::Context, path: &Path) -> Result<(), Box<dyn Error>> {
+fn gather_file(context: &mut emit::Context, path: &Path) -> Result<(), anyhow::Error> {
     let verbose = context.config.logging_verbose;
 
     context