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use crate::{AsgConvertError, Program, Span};
use indexmap::IndexMap;
pub trait ImportResolver {
fn resolve_package(&mut self, package_segments: &[&str], span: &Span) -> Result<Option<Program>, AsgConvertError>;
}
pub struct NullImportResolver;
impl ImportResolver for NullImportResolver {
fn resolve_package(
&mut self,
_package_segments: &[&str],
_span: &Span,
) -> Result<Option<Program>, AsgConvertError> {
Ok(None)
}
}
pub struct CoreImportResolver<'a, T: ImportResolver + 'static>(pub &'a mut T);
impl<'a, T: ImportResolver + 'static> ImportResolver for CoreImportResolver<'a, T> {
fn resolve_package(&mut self, package_segments: &[&str], span: &Span) -> Result<Option<Program>, AsgConvertError> {
if !package_segments.is_empty() && package_segments.get(0).unwrap() == &"core" {
Ok(crate::resolve_core_module(&*package_segments[1..].join("."))?)
} else {
self.0.resolve_package(package_segments, span)
}
}
}
pub struct StandardImportResolver;
impl ImportResolver for StandardImportResolver {
fn resolve_package(
&mut self,
_package_segments: &[&str],
_span: &Span,
) -> Result<Option<Program>, AsgConvertError> {
Ok(None)
}
}
pub struct MockedImportResolver {
pub packages: IndexMap<String, Program>,
}
impl ImportResolver for MockedImportResolver {
fn resolve_package(&mut self, package_segments: &[&str], _span: &Span) -> Result<Option<Program>, AsgConvertError> {
Ok(self.packages.get(&package_segments.join(".")).cloned())
}
}