Add add_runtime_support_include to meta

For metafunctions that require runtime support via #includes to be injected into lowered Cpp1 programs

Also cleanup while I'm at it:
- remove headers from `common.h` that are now already included via `cpp2util.h`
- line up some thing that got un-lined-up (OCD)

include/cpp2util.h

@@ -2813,8 +2813,6 @@ inline constexpr auto as_() -> decltype(auto)
 
 }
 
-#include "cpp2regex.h"
-
 using cpp2::cpp2_new;
 
 

regression-tests/test-results/gcc-10-c++20/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output

@@ -6,12 +6,12 @@ pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:46: error: expect
 In file included from pure2-bugfix-for-requires-clause-in-forward-declaration.cpp:7:
 ../../../include/cpp2util.h:10005:47: error: static assertion failed: GCC 11 or higher is required to support variables and type-scope functions that have a 'requires' clause. This includes a type-scope 'forward' parameter of non-wildcard type, such as 'func: (this, forward s: std::string)', which relies on being able to add a 'requires' clause - in that case, use 'forward s: _' instead if you need the result to compile with GCC 10.
 pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:4:1: note: in expansion of macro ‘CPP2_REQUIRES_’
-pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:3: error: no declaration matches ‘element::element(auto:241&&) requires  is_same_v<std::__cxx11::string, typename std::remove_cv<typename std::remove_reference<decltype(element::__ct ::n)>::type>::type>’
+pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:3: error: no declaration matches ‘element::element(auto:95&&) requires  is_same_v<std::__cxx11::string, typename std::remove_cv<typename std::remove_reference<decltype(element::__ct ::n)>::type>::type>’
 pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:5:11: note: candidates are: ‘element::element(const element&)’
-pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:20: note:                 ‘template<class auto:239> element::element(auto:239&&)’
+pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:20: note:                 ‘template<class auto:93> element::element(auto:93&&)’
 pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:1:7: note: ‘class element’ defined here
 pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:5:78: error: expected unqualified-id before ‘{’ token
-pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:8: error: no declaration matches ‘element& element::operator=(auto:242&&) requires  is_same_v<std::__cxx11::string, typename std::remove_cv<typename std::remove_reference<decltype(element::operator=::n)>::type>::type>’
+pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:8: error: no declaration matches ‘element& element::operator=(auto:96&&) requires  is_same_v<std::__cxx11::string, typename std::remove_cv<typename std::remove_reference<decltype(element::operator=::n)>::type>::type>’
 pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:6:16: note: candidates are: ‘void element::operator=(const element&)’
-pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:16: note:                 ‘template<class auto:240> element& element::operator=(auto:240&&)’
+pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:3:16: note:                 ‘template<class auto:94> element& element::operator=(auto:94&&)’
 pure2-bugfix-for-requires-clause-in-forward-declaration.cpp2:1:7: note: ‘class element’ defined here

regression-tests/test-results/gcc-10-c++20/pure2-print.cpp.output

@@ -9,8 +9,8 @@ pure2-print.cpp2:68:1: note: in expansion of macro ‘CPP2_REQUIRES_’
 pure2-print.cpp2:97:1: note: in expansion of macro ‘CPP2_REQUIRES_’
 pure2-print.cpp2:9:41: error: ‘constexpr const T outer::object_alias’ is not a static data member of ‘class outer’
 pure2-print.cpp2:9:48: error: template definition of non-template ‘constexpr const T outer::object_alias’
-pure2-print.cpp2:67:14: error: no declaration matches ‘void outer::mytype::variadic(const auto:240& ...) requires (is_convertible_v<typename std::remove_cv<typename std::remove_reference<decltype(outer::mytype::variadic::x)>::type>::type, int> && ...)’
-pure2-print.cpp2:67:29: note: candidate is: ‘template<class ... auto:239> static void outer::mytype::variadic(const auto:239& ...)’
+pure2-print.cpp2:67:14: error: no declaration matches ‘void outer::mytype::variadic(const auto:94& ...) requires (is_convertible_v<typename std::remove_cv<typename std::remove_reference<decltype(outer::mytype::variadic::x)>::type>::type, int> && ...)’
+pure2-print.cpp2:67:29: note: candidate is: ‘template<class ... auto:93> static void outer::mytype::variadic(const auto:93& ...)’
 pure2-print.cpp2:10:19: note: ‘class outer::mytype’ defined here
 pure2-print.cpp2:96:37: error: no declaration matches ‘void outer::print(std::ostream&, const Args& ...) requires  cpp2::impl::cmp_greater_eq(sizeof ... (Args ...), 0)’
 pure2-print.cpp2:96:37: note: no functions named ‘void outer::print(std::ostream&, const Args& ...) requires  cpp2::impl::cmp_greater_eq(sizeof ... (Args ...), 0)’

regression-tests/test-results/gcc-14-c++2b/gcc-version.output

@@ -1,4 +1,4 @@
-g++ (GCC) 14.1.1 20240701 (Red Hat 14.1.1-7)
+g++ (GCC) 14.2.1 20240801 (Red Hat 14.2.1-1)
 Copyright (C) 2024 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert.cpp.execution

@@ -1 +1 @@
-mixed-bounds-safety-with-assert.cpp2(11) void print_subrange(const auto:237&, cpp2::impl::in<int>, cpp2::impl::in<int>) [with auto:237 = std::vector<int>; cpp2::impl::in<int> = const int]: Bounds safety violation
+mixed-bounds-safety-with-assert.cpp2(11) void print_subrange(const auto:91&, cpp2::impl::in<int>, cpp2::impl::in<int>) [with auto:91 = std::vector<int>; cpp2::impl::in<int> = const int]: Bounds safety violation

regression-tests/test-results/msvc-2022-c++latest/pure2-regex_10_escapes.cpp.execution

@@ -9,26 +9,26 @@ Running tests_10_escapes:
 08_y: OK regex: foo(\h)bar parsed_regex: foo(\h)bar str: foo	bar result_expr: $1 expected_results 	
 09_y: OK regex: (\H)(\h) parsed_regex: (\H)(\h) str: foo	bar result_expr: $1-$2 expected_results o-	
 10_y: OK regex: (\h)(\H) parsed_regex: (\h)(\H) str: foo	bar result_expr: $1-$2 expected_results 	-b
-11_y: OK regex: foo(\v+)bar parsed_regex: foo(\v+)bar str: foo
+11_y: OK regex: foo(\v+)bar parsed_regex: foo(\v+)bar str: foo
+
 
+bar result_expr: $1 expected_results 
+
 
-bar result_expr: $1 expected_results 
 
+12_y: OK regex: (\V+)(\v) parsed_regex: (\V+)(\v) str: foo
+
 
+bar result_expr: $1-$2 expected_results foo-
+13_y: OK regex: (\v+)(\V) parsed_regex: (\v+)(\V) str: foo
+
 
-12_y: OK regex: (\V+)(\v) parsed_regex: (\V+)(\v) str: foo
-
-
-bar result_expr: $1-$2 expected_results foo-
-13_y: OK regex: (\v+)(\V) parsed_regex: (\v+)(\V) str: foo
-
-
-bar result_expr: $1-$2 expected_results 
-
+bar result_expr: $1-$2 expected_results 
+
 
 -b
-14_y: OK regex: foo(\v)bar parsed_regex: foo(\v)bar str: foobar result_expr: $1 expected_results 
-15_y: OK regex: (\V)(\v) parsed_regex: (\V)(\v) str: foobar result_expr: $1-$2 expected_results o-
+14_y: OK regex: foo(\v)bar parsed_regex: foo(\v)bar str: foobar result_expr: $1 expected_results 
+15_y: OK regex: (\V)(\v) parsed_regex: (\V)(\v) str: foobar result_expr: $1-$2 expected_results o-
 16_y: OK regex: (\v)(\V) parsed_regex: (\v)(\V) str: foobar result_expr: $1-$2 expected_results -b
 17_y: OK regex: foo\t\n\r\f\a\ebar parsed_regex: foo\t\n\r\f\a\ebar str: foo	
 bar result_expr: $& expected_results foo	

regression-tests/test-results/pure2-regex_01_char_matcher.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_02_ranges.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_03_wildcard.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_04_start_end.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_05_classes.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_06_boundaries.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_07_short_classes.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_08_alternatives.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_09_groups.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_10_escapes.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_11_group_references.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_12_case_insensitive.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_13_possessive_modifier.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_14_multiline_modifier.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_15_group_modifiers.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_16_perl_syntax_modifier.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_17_comments.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_18_branch_reset.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

regression-tests/test-results/pure2-regex_19_lookahead.cpp

@@ -1,5 +1,6 @@
 
 #define CPP2_IMPORT_STD          Yes
+#include "cpp2regex.h"
 
 //=== Cpp2 type declarations ====================================================
 

source/common.h

@@ -38,20 +38,11 @@
 #ifndef CPP2_COMMON_H
 #define CPP2_COMMON_H
 
-#include <algorithm>
 #include <cassert>
 #include <cctype>
 #include <chrono>
-#include <compare>
-#include <cstdint>
 #include <iomanip>
-#include <iterator>
-#include <memory>
-#include <map>
-#include <string>
-#include <string_view>
 #include <unordered_map>
-#include <vector>
 
 namespace cpp2 {
 

source/parse.h

@@ -5532,6 +5532,7 @@ auto pretty_print_visualize(translation_unit_node const& n)
 class parser
 {
     std::vector<error_entry>& errors;
+    std::set<std::string>&    includes;
 
     std::unique_ptr<translation_unit_node> parse_tree = {};
 
@@ -5577,10 +5578,10 @@ class parser
         }
     };
 
-    std::vector<token> const* tokens = {};
+    std::vector<token> const* tokens           = {};
     stable_vector<token>*     generated_tokens = {};
-    int pos = 0;
-    std::string parse_kind = {};
+    int                       pos              = 0;
+    std::string               parse_kind       = {};
 
     //  Keep track of the function bodies' locations - used to emit comments
     //  in the right pass (decide whether it's a comment that belongs with
@@ -5656,13 +5657,18 @@ class parser
     //
     //  errors      error list
     //
-    parser( std::vector<error_entry>& errors_ )
+    parser( 
+        std::vector<error_entry>& errors_,
+        std::set<std::string>&    includes_
+    )
         : errors{ errors_ }
+        , includes{ includes_ }
         , parse_tree{std::make_unique<translation_unit_node>()}
     { }
 
     parser( parser const& that )
         : errors{ that.errors }
+        , includes{ that.includes }
         , parse_tree{std::make_unique<translation_unit_node>()}
     { }