C++: Add C23/C++23 floating-point types to dbscheme.

Author: sashabu

cpp/ql/lib/semmlecode.cpp.dbscheme

@@ -612,6 +612,14 @@ case @builtintype.kind of
 | 51 = @char8_t
 | 52 = @float16               // _Float16
 | 53 = @complex_float16       // _Complex _Float16
+| 54 = @fp16                  // __fp16
+| 55 = @std_bfloat16          // __bf16
+| 56 = @std_float16           // std::float16_t
+| 57 = @complex_std_float32   // _Complex _Float32
+| 58 = @complex_float32x      // _Complex _Float32x
+| 59 = @complex_std_float64   // _Complex _Float64
+| 60 = @complex_float64x      // _Complex _Float64x
+| 61 = @complex_std_float128  // _Complex _Float128
 ;
 
 builtintypes(

cpp/ql/src/change-notes/2023-09-04-more-floating-point-types.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Added support for new floating-point types in C23 and C++23.