gccrs: Fix assignment operator overloads for AST and HIR patterns

gcc/rust/ChangeLog:

	* ast/rust-pattern.h
	(StructPatternElements::operator=): Clear vector before inserting.
	(TupleStructItemsNoRange::operator=): Clear vector before inserting.
	(TupleStructItemsRange::operator=): Clear vectors before inserting.
	(TuplePatternItemsMultiple::operator=): Clear vector before inserting.
	(TuplePatternItemsRanged::operator=): Clear vectors before inserting.
	(SlicePattern::operator=): Clear vector before inserting.
	(AltPattern::operator=): Clear vector before inserting.
	* hir/tree/rust-hir-pattern.h
	(StructPatternElements::operator=): Clear vector before inserting.
	(TupleStructItemsNoRange::operator=): Clear vector before inserting.
	(TupleStructItemsRange::operator=): Clear vectors before inserting.
	(TuplePatternItemsMultiple::operator=): Clear vector before inserting.
	(TuplePatternItemsRanged::operator=): Clear vectors before inserting.
	(SlicePattern::operator=): Clear vector before inserting.

Signed-off-by: Owen Avery <powerboat9.gamer@gmail.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/gcc/rust/ast/rust-pattern.h b/gcc/rust/ast/rust-pattern.h
index fc587ab..8200b80 100644
--- a/gcc/rust/ast/rust-pattern.h
+++ b/gcc/rust/ast/rust-pattern.h
@@ -830,6 +830,7 @@ public:
     struct_pattern_etc_attrs = other.struct_pattern_etc_attrs;
     has_struct_pattern_etc = other.has_struct_pattern_etc;
 
+    fields.clear ();
     fields.reserve (other.fields.size ());
     for (const auto &e : other.fields)
       fields.push_back (e->clone_struct_pattern_field ());
@@ -986,6 +987,7 @@ public:
   // Overloaded assignment operator with vector clone
   TupleStructItemsNoRange &operator= (TupleStructItemsNoRange const &other)
   {
+    patterns.clear ();
     patterns.reserve (other.patterns.size ());
     for (const auto &e : other.patterns)
       patterns.push_back (e->clone_pattern ());
@@ -1048,10 +1050,12 @@ public:
   // Overloaded assignment operator to clone
   TupleStructItemsRange &operator= (TupleStructItemsRange const &other)
   {
+    lower_patterns.clear ();
     lower_patterns.reserve (other.lower_patterns.size ());
     for (const auto &e : other.lower_patterns)
       lower_patterns.push_back (e->clone_pattern ());
 
+    upper_patterns.clear ();
     upper_patterns.reserve (other.upper_patterns.size ());
     for (const auto &e : other.upper_patterns)
       upper_patterns.push_back (e->clone_pattern ());
@@ -1263,6 +1267,7 @@ public:
   // Overloaded assignment operator to vector clone
   TuplePatternItemsMultiple &operator= (TuplePatternItemsMultiple const &other)
   {
+    patterns.clear ();
     patterns.reserve (other.patterns.size ());
     for (const auto &e : other.patterns)
       patterns.push_back (e->clone_pattern ());
@@ -1328,10 +1333,12 @@ public:
   // Overloaded assignment operator to clone
   TuplePatternItemsRanged &operator= (TuplePatternItemsRanged const &other)
   {
+    lower_patterns.clear ();
     lower_patterns.reserve (other.lower_patterns.size ());
     for (const auto &e : other.lower_patterns)
       lower_patterns.push_back (e->clone_pattern ());
 
+    upper_patterns.clear ();
     upper_patterns.reserve (other.upper_patterns.size ());
     for (const auto &e : other.upper_patterns)
       upper_patterns.push_back (e->clone_pattern ());
@@ -1541,6 +1548,7 @@ public:
     locus = other.locus;
     node_id = other.node_id;
 
+    items.clear ();
     items.reserve (other.items.size ());
     for (const auto &e : other.items)
       items.push_back (e->clone_pattern ());
@@ -1607,6 +1615,7 @@ public:
     locus = other.locus;
     node_id = other.node_id;
 
+    alts.clear ();
     alts.reserve (other.alts.size ());
     for (const auto &e : other.alts)
       alts.push_back (e->clone_pattern ());
diff --git a/gcc/rust/hir/tree/rust-hir-pattern.h b/gcc/rust/hir/tree/rust-hir-pattern.h
index 9bc143d..934a39a 100644
--- a/gcc/rust/hir/tree/rust-hir-pattern.h
+++ b/gcc/rust/hir/tree/rust-hir-pattern.h
@@ -696,6 +696,7 @@ public:
   // Overloaded assignment operator with vector clone
   StructPatternElements &operator= (StructPatternElements const &other)
   {
+    fields.clear ();
     fields.reserve (other.fields.size ());
     for (const auto &e : other.fields)
       fields.push_back (e->clone_struct_pattern_field ());
@@ -819,6 +820,7 @@ public:
   // Overloaded assignment operator with vector clone
   TupleStructItemsNoRange &operator= (TupleStructItemsNoRange const &other)
   {
+    patterns.clear ();
     patterns.reserve (other.patterns.size ());
     for (const auto &e : other.patterns)
       patterns.push_back (e->clone_pattern ());
@@ -880,10 +882,12 @@ public:
   // Overloaded assignment operator to clone
   TupleStructItemsRange &operator= (TupleStructItemsRange const &other)
   {
+    lower_patterns.clear ();
     lower_patterns.reserve (other.lower_patterns.size ());
     for (const auto &e : other.lower_patterns)
       lower_patterns.push_back (e->clone_pattern ());
 
+    upper_patterns.clear ();
     upper_patterns.reserve (other.upper_patterns.size ());
     for (const auto &e : other.upper_patterns)
       upper_patterns.push_back (e->clone_pattern ());
@@ -1050,6 +1054,7 @@ public:
   // Overloaded assignment operator to vector clone
   TuplePatternItemsMultiple &operator= (TuplePatternItemsMultiple const &other)
   {
+    patterns.clear ();
     patterns.reserve (other.patterns.size ());
     for (const auto &e : other.patterns)
       patterns.push_back (e->clone_pattern ());
@@ -1114,10 +1119,12 @@ public:
   // Overloaded assignment operator to clone
   TuplePatternItemsRanged &operator= (TuplePatternItemsRanged const &other)
   {
+    lower_patterns.clear ();
     lower_patterns.reserve (other.lower_patterns.size ());
     for (const auto &e : other.lower_patterns)
       lower_patterns.push_back (e->clone_pattern ());
 
+    lower_patterns.clear ();
     upper_patterns.reserve (other.upper_patterns.size ());
     for (const auto &e : other.upper_patterns)
       upper_patterns.push_back (e->clone_pattern ());
@@ -1257,6 +1264,7 @@ public:
     locus = other.locus;
     mappings = other.mappings;
 
+    items.clear ();
     items.reserve (other.items.size ());
     for (const auto &e : other.items)
       items.push_back (e->clone_pattern ());