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cli: Use anyhow and thiserror for errors

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This patch updates the CLI to use anyhow and thiserror for error
management.  The main feature that our custom `Error` type was providing
was a _list_ of messages, which would allow us to annotate "lower-level"
errors with more contextual information.  This is exactly what's
provided by anyhow's `Context` trait.

(This is setup work for a future PR that will pull the `config` and
`loader` modules out into separate crates; by using `anyhow` we wouldn't
have to deal with a circular dependency between with the new crates.)
This commit is contained in:
Douglas Creager 2021-06-09 12:32:22 -04:00
parent 9d77561c43
commit d2d01e77e3
33 changed files with 237 additions and 419 deletions
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2
cli/src/generate/build_tables/mod.rs
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@ -11,12 +11,12 @@ use self::build_parse_table::{build_parse_table, ParseStateInfo};
use self::coincident_tokens::CoincidentTokenIndex;
use self::minimize_parse_table::minimize_parse_table;
use self::token_conflicts::TokenConflictMap;
use crate::error::Result;
use crate::generate::grammars::{InlinedProductionMap, LexicalGrammar, SyntaxGrammar};
use crate::generate::nfa::NfaCursor;
use crate::generate::node_types::VariableInfo;
use crate::generate::rules::{AliasMap, Symbol, SymbolType, TokenSet};
use crate::generate::tables::{LexTable, ParseAction, ParseTable, ParseTableEntry};
use anyhow::Result;
use log::info;
use std::collections::{BTreeSet, HashMap};