46 lines
1.9 KiB
Rust
46 lines
1.9 KiB
Rust
use hir::db::DefDatabase;
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use crate::{Diagnostic, DiagnosticsContext, Severity};
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// Diagnostic: unresolved-proc-macro
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//
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// This diagnostic is shown when a procedural macro can not be found. This usually means that
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// procedural macro support is simply disabled (and hence is only a weak hint instead of an error),
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// but can also indicate project setup problems.
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//
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// If you are seeing a lot of "proc macro not expanded" warnings, you can add this option to the
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// `rust-analyzer.diagnostics.disabled` list to prevent them from showing. Alternatively you can
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// enable support for procedural macros (see `rust-analyzer.procMacro.attributes.enable`).
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pub(crate) fn unresolved_proc_macro(
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ctx: &DiagnosticsContext<'_>,
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d: &hir::UnresolvedProcMacro,
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proc_macros_enabled: bool,
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proc_attr_macros_enabled: bool,
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) -> Diagnostic {
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// Use more accurate position if available.
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let display_range = ctx.resolve_precise_location(&d.node, d.precise_location);
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let config_enabled = match d.kind {
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hir::MacroKind::Attr => proc_macros_enabled && proc_attr_macros_enabled,
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_ => proc_macros_enabled,
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};
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let not_expanded_message = match &d.macro_name {
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Some(name) => format!("proc macro `{name}` not expanded"),
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None => "proc macro not expanded".to_string(),
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};
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let severity = if config_enabled { Severity::Error } else { Severity::WeakWarning };
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let def_map = ctx.sema.db.crate_def_map(d.krate);
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let message = if config_enabled {
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def_map.proc_macro_loading_error().unwrap_or("proc macro not found in the built dylib")
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} else {
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match d.kind {
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hir::MacroKind::Attr if proc_macros_enabled => "attribute macro expansion is disabled",
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_ => "proc-macro expansion is disabled",
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}
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};
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let message = format!("{not_expanded_message}: {message}");
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Diagnostic::new("unresolved-proc-macro", message, display_range).severity(severity)
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}
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