Store a flat list of patterns in Thir (not yet used)

Author: Zalathar

compiler/rustc_middle/src/thir.rs

@@ -88,6 +88,7 @@ thir_with_elements! {
     exprs: ExprId => Expr<'tcx> => "e{}",
     stmts: StmtId => Stmt<'tcx> => "s{}",
     params: ParamId => Param<'tcx> => "p{}",
+    pats: PatId => Pat<'tcx> => "pat{}",
 }
 
 #[derive(Debug, HashStable)]

compiler/rustc_middle/src/ty/structural_impls.rs

@@ -261,6 +261,7 @@ TrivialTypeTraversalImpls! {
     crate::mir::SourceScope,
     crate::mir::SourceScopeLocalData,
     crate::mir::SwitchTargets,
+    crate::thir::PatId,
     crate::traits::IsConstable,
     crate::traits::OverflowError,
     crate::ty::abstract_const::NotConstEvaluatable,

tests/ui/thir-print/thir-flat-const-variant.stdout

@@ -81,6 +81,7 @@ Thir {
     ],
     stmts: [],
     params: [],
+    pats: [],
 }
 
 DefId(0:9 ~ thir_flat_const_variant[1f54]::{impl#0}::BAR2):
@@ -166,6 +167,7 @@ Thir {
     ],
     stmts: [],
     params: [],
+    pats: [],
 }
 
 DefId(0:10 ~ thir_flat_const_variant[1f54]::{impl#0}::BAR3):
@@ -251,6 +253,7 @@ Thir {
     ],
     stmts: [],
     params: [],
+    pats: [],
 }
 
 DefId(0:11 ~ thir_flat_const_variant[1f54]::{impl#0}::BAR4):
@@ -336,6 +339,7 @@ Thir {
     ],
     stmts: [],
     params: [],
+    pats: [],
 }
 
 DefId(0:12 ~ thir_flat_const_variant[1f54]::main):
@@ -388,5 +392,6 @@ Thir {
     ],
     stmts: [],
     params: [],
+    pats: [],
 }
 

tests/ui/thir-print/thir-flat.stdout

@@ -48,5 +48,6 @@ Thir {
     ],
     stmts: [],
     params: [],
+    pats: [],
 }