[automation] Use std::array in And/Or/Xor conditions

Template AndCondition, OrCondition, and XorCondition on N so the
condition pointer list is stored in std::array<Condition<Ts...>*, N>
instead of FixedVector. N is set by code generation to match the
exact number of conditions configured in YAML.

Add init_array_from() helper for optimal codegen when initializing
std::array from initializer_list.

esphome/automation.py

@@ -250,7 +250,9 @@ async def and_condition_to_code(
     args: TemplateArgsType,
 ) -> MockObj:
     conditions = await build_condition_list(config, template_arg, args)
-    return cg.new_Pvariable(condition_id, template_arg, conditions)
+    return cg.new_Pvariable(
+        condition_id, cg.TemplateArguments(len(conditions), *template_arg), conditions
+    )
 
 
 @register_condition("or", OrCondition, validate_condition_list)
@@ -261,7 +263,9 @@ async def or_condition_to_code(
     args: TemplateArgsType,
 ) -> MockObj:
     conditions = await build_condition_list(config, template_arg, args)
-    return cg.new_Pvariable(condition_id, template_arg, conditions)
+    return cg.new_Pvariable(
+        condition_id, cg.TemplateArguments(len(conditions), *template_arg), conditions
+    )
 
 
 @register_condition("all", AndCondition, validate_condition_list)
@@ -272,7 +276,9 @@ async def all_condition_to_code(
     args: TemplateArgsType,
 ) -> MockObj:
     conditions = await build_condition_list(config, template_arg, args)
-    return cg.new_Pvariable(condition_id, template_arg, conditions)
+    return cg.new_Pvariable(
+        condition_id, cg.TemplateArguments(len(conditions), *template_arg), conditions
+    )
 
 
 @register_condition("any", OrCondition, validate_condition_list)
@@ -283,7 +289,9 @@ async def any_condition_to_code(
     args: TemplateArgsType,
 ) -> MockObj:
     conditions = await build_condition_list(config, template_arg, args)
-    return cg.new_Pvariable(condition_id, template_arg, conditions)
+    return cg.new_Pvariable(
+        condition_id, cg.TemplateArguments(len(conditions), *template_arg), conditions
+    )
 
 
 @register_condition("not", NotCondition, validate_potentially_and_condition)
@@ -305,7 +313,9 @@ async def xor_condition_to_code(
     args: TemplateArgsType,
 ) -> MockObj:
     conditions = await build_condition_list(config, template_arg, args)
-    return cg.new_Pvariable(condition_id, template_arg, conditions)
+    return cg.new_Pvariable(
+        condition_id, cg.TemplateArguments(len(conditions), *template_arg), conditions
+    )
 
 
 @register_condition("lambda", LambdaCondition, cv.returning_lambda)

esphome/core/base_automation.h

@@ -9,14 +9,17 @@
 #include "esphome/core/application.h"
 #include "esphome/core/helpers.h"
 
+#include <array>
 #include <list>
 #include <vector>
 
 namespace esphome {
 
-template<typename... Ts> class AndCondition : public Condition<Ts...> {
+template<size_t N, typename... Ts> class AndCondition : public Condition<Ts...> {
  public:
-  explicit AndCondition(std::initializer_list<Condition<Ts...> *> conditions) : conditions_(conditions) {}
+  explicit AndCondition(std::initializer_list<Condition<Ts...> *> conditions) {
+    init_array_from(this->conditions_, conditions);
+  }
   bool check(const Ts &...x) override {
     for (auto *condition : this->conditions_) {
       if (!condition->check(x...))
@@ -27,12 +30,14 @@ template<typename... Ts> class AndCondition : public Condition<Ts...> {
   }
 
  protected:
-  FixedVector<Condition<Ts...> *> conditions_;
+  std::array<Condition<Ts...> *, N> conditions_{};
 };
 
-template<typename... Ts> class OrCondition : public Condition<Ts...> {
+template<size_t N, typename... Ts> class OrCondition : public Condition<Ts...> {
  public:
-  explicit OrCondition(std::initializer_list<Condition<Ts...> *> conditions) : conditions_(conditions) {}
+  explicit OrCondition(std::initializer_list<Condition<Ts...> *> conditions) {
+    init_array_from(this->conditions_, conditions);
+  }
   bool check(const Ts &...x) override {
     for (auto *condition : this->conditions_) {
       if (condition->check(x...))
@@ -43,7 +48,7 @@ template<typename... Ts> class OrCondition : public Condition<Ts...> {
   }
 
  protected:
-  FixedVector<Condition<Ts...> *> conditions_;
+  std::array<Condition<Ts...> *, N> conditions_{};
 };
 
 template<typename... Ts> class NotCondition : public Condition<Ts...> {
@@ -55,9 +60,11 @@ template<typename... Ts> class NotCondition : public Condition<Ts...> {
   Condition<Ts...> *condition_;
 };
 
-template<typename... Ts> class XorCondition : public Condition<Ts...> {
+template<size_t N, typename... Ts> class XorCondition : public Condition<Ts...> {
  public:
-  explicit XorCondition(std::initializer_list<Condition<Ts...> *> conditions) : conditions_(conditions) {}
+  explicit XorCondition(std::initializer_list<Condition<Ts...> *> conditions) {
+    init_array_from(this->conditions_, conditions);
+  }
   bool check(const Ts &...x) override {
     size_t result = 0;
     for (auto *condition : this->conditions_) {
@@ -68,7 +75,7 @@ template<typename... Ts> class XorCondition : public Condition<Ts...> {
   }
 
  protected:
-  FixedVector<Condition<Ts...> *> conditions_;
+  std::array<Condition<Ts...> *, N> conditions_{};
 };
 
 template<typename... Ts> class LambdaCondition : public Condition<Ts...> {

esphome/core/helpers.h

@@ -2,6 +2,7 @@
 
 #include <algorithm>
 #include <array>
+#include <cassert>
 #include <cmath>
 #include <cstdarg>
 #include <cstdint>
@@ -497,6 +498,24 @@ template<typename T, size_t MAX_CAPACITY = std::numeric_limits<uint16_t>::max()>
   index_type capacity_{0};
 };
 
+/// Initialize a std::array from an initializer_list. Uses memcpy for trivially copyable types (optimal codegen),
+/// falls back to element-wise copy for non-trivially copyable types (e.g. TemplatableValue).
+/// N is always set by code generation — the caller is responsible for ensuring src.size() == N.
+/// The debug assert is a safety net for development, not a runtime check.
+template<typename T, size_t N> inline void init_array_from(std::array<T, N> &dest, std::initializer_list<T> src) {
+#ifdef ESPHOME_DEBUG
+  assert(src.size() == N);
+#endif
+  if constexpr (std::is_trivially_copyable_v<T>) {
+    __builtin_memcpy(dest.data(), src.begin(), N * sizeof(T));
+  } else {
+    size_t i = 0;
+    for (const auto &v : src) {
+      dest[i++] = v;
+    }
+  }
+}
+
 /// Fixed-capacity vector - allocates once at runtime, never reallocates
 /// This avoids std::vector template overhead (_M_realloc_insert, _M_default_append)
 /// when size is known at initialization but not at compile time