Auto merge of rust-lang#15819 - wasd96040501:feat/skip_tt_count_limit, r=lnicola

feat: skip checking token tree count for include! macro call

fix rust-lang#15335 rust-lang#15648

Author: bors

crates/hir-expand/src/db.rs

@@ -12,11 +12,15 @@ use syntax::{
 use triomphe::Arc;
 
 use crate::{
-    ast_id_map::AstIdMap, builtin_attr_macro::pseudo_derive_attr_expansion,
-    builtin_fn_macro::EagerExpander, fixup, hygiene::HygieneFrame, tt, AstId, BuiltinAttrExpander,
-    BuiltinDeriveExpander, BuiltinFnLikeExpander, EagerCallInfo, ExpandError, ExpandResult,
-    ExpandTo, HirFileId, HirFileIdRepr, MacroCallId, MacroCallKind, MacroCallLoc, MacroDefId,
-    MacroDefKind, MacroFile, ProcMacroExpander,
+    ast_id_map::AstIdMap,
+    builtin_attr_macro::pseudo_derive_attr_expansion,
+    builtin_fn_macro::EagerExpander,
+    fixup,
+    hygiene::HygieneFrame,
+    name::{name, AsName},
+    tt, AstId, BuiltinAttrExpander, BuiltinDeriveExpander, BuiltinFnLikeExpander, EagerCallInfo,
+    ExpandError, ExpandResult, ExpandTo, HirFileId, HirFileIdRepr, MacroCallId, MacroCallKind,
+    MacroCallLoc, MacroDefId, MacroDefKind, MacroFile, ProcMacroExpander,
 };
 
 /// Total limit on the number of tokens produced by any macro invocation.
@@ -614,9 +618,25 @@ fn macro_expand(db: &dyn ExpandDatabase, id: MacroCallId) -> ExpandResult<Arc<tt
         err = error.clone().or(err);
     }
 
-    // Set a hard limit for the expanded tt
-    if let Err(value) = check_tt_count(&tt) {
-        return value;
+    // Skip checking token tree limit for include! macro call
+    let skip_check_tt_count = match loc.kind {
+        MacroCallKind::FnLike { ast_id, expand_to: _ } => {
+            if let Some(name_ref) =
+                ast_id.to_node(db).path().and_then(|p| p.segment()).and_then(|s| s.name_ref())
+            {
+                name_ref.as_name() == name!(include)
+            } else {
+                false
+            }
+        }
+        _ => false,
+    };
+
+    if !skip_check_tt_count {
+        // Set a hard limit for the expanded tt
+        if let Err(value) = check_tt_count(&tt) {
+            return value;
+        }
     }
 
     ExpandResult { value: Arc::new(tt), err }