added consts, fixed a initialization to pass clang-tidy

Author: farmerpiki

.clang-tidy

@@ -1 +1 @@
-Checks: 'misc-*, -misc-definitions-in-headers, -misc-non-private-member-variables-in-classes, -misc-no-recursion'
+Checks: 'misc-*, -misc-definitions-in-headers, -misc-non-private-member-variables-in-classes, -misc-no-recursion, -misc-include-cleaner, -misc-use-anonymous-namespace'

include/cpp2util.h

@@ -1725,12 +1725,12 @@ inline constexpr auto is_narrowing_v =
     // [dcl.init.list] 7.1
     (std::is_floating_point_v<From> && std::is_integral_v<To>) ||
     // [dcl.init.list] 7.2
-    (std::is_floating_point_v<From> && std::is_floating_point_v<To> && sizeof(From) > sizeof(To)) ||
+    (std::is_floating_point_v<From> && std::is_floating_point_v<To> && sizeof(From) > sizeof(To)) || // NOLINT(misc-redundant-expression)
     // [dcl.init.list] 7.3
     (std::is_integral_v<From> && std::is_floating_point_v<To>) ||
     (std::is_enum_v<From> && std::is_floating_point_v<To>) ||
     // [dcl.init.list] 7.4
-    (std::is_integral_v<From> && std::is_integral_v<To> && sizeof(From) > sizeof(To)) ||
+    (std::is_integral_v<From> && std::is_integral_v<To> && sizeof(From) > sizeof(To)) || // NOLINT(misc-redundant-expression)
     (std::is_enum_v<From> && std::is_integral_v<To> && sizeof(From) > sizeof(To)) ||
     // [dcl.init.list] 7.5
     (std::is_pointer_v<From> && std::is_same_v<To, bool>)

source/common.h

@@ -880,8 +880,8 @@ class cmdline_processor
         -> void
     {
         help_requested = true;
-        std::string_view a = __DATE__;
-        std::string_view b = __TIME__;
+        const std::string_view a = __DATE__;
+        const std::string_view b = __TIME__;
         std::unordered_map<std::string_view, char> m = { {"Jan",'1'}, {"Feb",'2'}, {"Mar",'3'}, {"Apr",'4'}, {"May",'5'}, {"Jun",'6'}, {"Jul",'7'}, {"Aug",'8'}, {"Sep",'9'}, {"Oct",'A'}, {"Nov",'B'}, {"Dec",'C'} };
 
         auto stamp = std::to_string(atoi(&a[9])-15);

source/parse.h

@@ -5947,7 +5947,7 @@ class parser
             //  Remember current position, because we may need to backtrack
             auto start_pos = pos;
 
-            bool inside_initializer = (
+            const bool inside_initializer = (
                 peek(-1) && peek(-1)->type() == lexeme::Assignment
             );
             auto open_paren = &curr();
@@ -7909,7 +7909,7 @@ class parser
     )
         -> std::unique_ptr<compound_statement_node>
     {
-        bool is_braced = curr().type() == lexeme::LeftBrace;
+        const bool is_braced = curr().type() == lexeme::LeftBrace;
         if (
             !is_braced
             && !allow_single_unbraced_statement