105 lines
2.5 KiB
Rust
105 lines
2.5 KiB
Rust
use alloc::{string::String, vec::Vec};
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use crate::{
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Ast, ExprId, SourceForm, SourceId, Value,
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runtime::{EnvId, ThunkId},
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};
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#[derive(Debug, Clone)]
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pub struct Module {
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pub key: String,
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pub name: String,
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pub source: SourceId,
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pub ast: Ast,
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pub root: ExprId,
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pub source_form: SourceForm,
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pub root_env: EnvId,
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pub root_thunk: ThunkId,
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}
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/// Content resolved by an [`ImportLoader`].
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#[derive(Debug, Clone)]
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pub enum LoadedImport {
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Source {
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key: String,
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name: String,
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source: String,
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},
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Value {
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key: String,
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value: Value,
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},
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}
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/// An import specifier offered by host-owned language tooling.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct ImportCandidate {
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pub specifier: String,
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pub detail: Option<String>,
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}
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impl ImportCandidate {
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pub fn new(specifier: impl Into<String>) -> Self {
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Self {
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specifier: specifier.into(),
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detail: None,
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}
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}
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pub fn with_detail(mut self, detail: impl Into<String>) -> Self {
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self.detail = Some(detail.into());
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self
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}
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}
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impl LoadedImport {
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pub fn source(
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key: impl Into<String>,
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name: impl Into<String>,
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source: impl Into<String>,
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) -> Self {
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Self::Source {
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key: key.into(),
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name: name.into(),
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source: source.into(),
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}
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}
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pub fn value(key: impl Into<String>, value: Value) -> Self {
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Self::Value {
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key: key.into(),
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value,
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}
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}
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}
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pub trait ImportLoader {
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fn load(&mut self, current_key: Option<&str>, specifier: &str) -> crate::Result<LoadedImport>;
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/// Returns host-resolvable import specifiers matching an unfinished prefix.
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///
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/// Runtime-only loaders may keep the default implementation. Hosts that
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/// provide an editor should implement this from the same namespace used by
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/// [`ImportLoader::load`].
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fn complete_import(
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&mut self,
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_current_key: Option<&str>,
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_prefix: &str,
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) -> crate::Result<Vec<ImportCandidate>> {
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Ok(Vec::new())
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}
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}
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#[derive(Debug, Clone, Copy, Default)]
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pub struct EmptyLoader;
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impl ImportLoader for EmptyLoader {
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fn load(&mut self, _current_key: Option<&str>, specifier: &str) -> crate::Result<LoadedImport> {
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Err(crate::Diagnostic::new(
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crate::DiagnosticKind::Import,
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crate::Span::default(),
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alloc::format!("no source loader is configured for import `{specifier}`"),
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))
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}
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}
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