mirror of
https://github.com/denoland/deno
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82 lines
2.6 KiB
Rust
82 lines
2.6 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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//! There are many types of errors in Deno:
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//! - AnyError: a generic wrapper that can encapsulate any type of error.
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//! - JsError: a container for the error message and stack trace for exceptions
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//! thrown in JavaScript code. We use this to pretty-print stack traces.
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//! - Diagnostic: these are errors that originate in TypeScript's compiler.
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//! They're similar to JsError, in that they have line numbers. But
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//! Diagnostics are compile-time type errors, whereas JsErrors are runtime
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//! exceptions.
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use crate::emit::GraphError;
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use deno_ast::Diagnostic;
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use deno_core::error::AnyError;
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use deno_graph::ModuleGraphError;
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use deno_graph::ResolutionError;
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use import_map::ImportMapError;
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fn get_import_map_error_class(_: &ImportMapError) -> &'static str {
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"URIError"
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}
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fn get_diagnostic_class(_: &Diagnostic) -> &'static str {
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"SyntaxError"
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}
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fn get_graph_error_class(err: &GraphError) -> &'static str {
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get_module_graph_error_class(&err.0)
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}
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pub(crate) fn get_module_graph_error_class(
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err: &ModuleGraphError,
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) -> &'static str {
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match err {
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ModuleGraphError::LoadingErr(_, err) => get_error_class_name(err.as_ref()),
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ModuleGraphError::InvalidSource(_, _) => "SyntaxError",
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ModuleGraphError::ParseErr(_, diagnostic) => {
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get_diagnostic_class(diagnostic)
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}
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ModuleGraphError::ResolutionError(err) => get_resolution_error_class(err),
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ModuleGraphError::UnsupportedMediaType(_, _) => "TypeError",
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ModuleGraphError::Missing(_) => "NotFound",
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}
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}
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fn get_resolution_error_class(err: &ResolutionError) -> &'static str {
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match err {
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ResolutionError::ResolverError(err, _, _) => {
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get_error_class_name(err.as_ref())
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}
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_ => "TypeError",
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}
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}
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pub(crate) fn get_error_class_name(e: &AnyError) -> &'static str {
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deno_runtime::errors::get_error_class_name(e)
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.or_else(|| {
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e.downcast_ref::<ImportMapError>()
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.map(get_import_map_error_class)
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})
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.or_else(|| e.downcast_ref::<Diagnostic>().map(get_diagnostic_class))
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.or_else(|| e.downcast_ref::<GraphError>().map(get_graph_error_class))
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.or_else(|| {
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e.downcast_ref::<ModuleGraphError>()
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.map(get_module_graph_error_class)
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})
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.or_else(|| {
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e.downcast_ref::<ResolutionError>()
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.map(get_resolution_error_class)
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})
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.unwrap_or_else(|| {
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eprintln!(
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"Error '{}' contains boxed error of unknown type:{}",
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e,
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e.chain()
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.map(|e| format!("\n {:?}", e))
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.collect::<String>()
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);
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"Error"
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})
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}
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