mirror of
https://github.com/nushell/nushell.git
synced 2025-04-19 10:48:21 +02:00
e4226def16
This commit extracts five new crates:
- nu-source, which contains the core source-code handling logic in Nu,
including Text, Span, and also the pretty.rs-based debug logic
- nu-parser, which is the parser and expander logic
- nu-protocol, which is the bulk of the types and basic conveniences
used by plugins
- nu-errors, which contains ShellError, ParseError and error handling
conveniences
- nu-textview, which is the textview plugin extracted into a crate
One of the major consequences of this refactor is that it's no longer
possible to `impl X for Spanned<Y>` outside of the `nu-source` crate, so
a lot of types became more concrete (Value became a concrete type
instead of Spanned<Value>, for example).
This also turned a number of inherent methods in the main nu crate into
plain functions (impl Value {} became a bunch of functions in the
`value` namespace in `crate::data::value`).
102 lines
2.7 KiB
Rust
102 lines
2.7 KiB
Rust
use derive_new::new;
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use language_reporting::{FileName, Location};
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use log::trace;
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use nu_source::Span;
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#[derive(new, Debug, Clone)]
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pub struct Files {
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snippet: String,
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}
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impl language_reporting::ReportingFiles for Files {
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type Span = Span;
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type FileId = usize;
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fn byte_span(
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&self,
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_file: Self::FileId,
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from_index: usize,
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to_index: usize,
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) -> Option<Self::Span> {
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Some(Span::new(from_index, to_index))
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}
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fn file_id(&self, _tag: Self::Span) -> Self::FileId {
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0
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}
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fn file_name(&self, _file: Self::FileId) -> FileName {
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FileName::Verbatim(format!("shell"))
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}
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fn byte_index(&self, _file: Self::FileId, _line: usize, _column: usize) -> Option<usize> {
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unimplemented!("byte_index")
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}
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fn location(&self, _file: Self::FileId, byte_index: usize) -> Option<Location> {
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let source = &self.snippet;
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let mut seen_lines = 0;
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let mut seen_bytes = 0;
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for (pos, slice) in source.match_indices('\n') {
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trace!(
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"SEARCH={} SEEN={} POS={} SLICE={:?} LEN={} ALL={:?}",
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byte_index,
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seen_bytes,
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pos,
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slice,
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source.len(),
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source
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);
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if pos >= byte_index {
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return Some(language_reporting::Location::new(
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seen_lines,
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byte_index - seen_bytes,
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));
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} else {
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seen_lines += 1;
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seen_bytes = pos;
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}
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}
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if seen_lines == 0 {
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Some(language_reporting::Location::new(0, byte_index))
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} else {
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panic!("byte index {} wasn't valid", byte_index);
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}
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}
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fn line_span(&self, _file: Self::FileId, lineno: usize) -> Option<Self::Span> {
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let source = &self.snippet;
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let mut seen_lines = 0;
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let mut seen_bytes = 0;
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for (pos, _) in source.match_indices('\n') {
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if seen_lines == lineno {
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return Some(Span::new(seen_bytes, pos + 1));
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} else {
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seen_lines += 1;
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seen_bytes = pos + 1;
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}
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}
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if seen_lines == 0 {
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Some(Span::new(0, self.snippet.len() - 1))
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} else {
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None
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}
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}
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fn source(&self, span: Self::Span) -> Option<String> {
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trace!("source(tag={:?}) snippet={:?}", span, self.snippet);
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if span.start() > span.end() {
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return None;
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} else if span.end() > self.snippet.len() {
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return None;
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}
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Some(span.slice(&self.snippet).to_string())
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}
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}
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