fix(c) fixed hex decimal numbers (#4094)

Author: Dxuian

CHANGES.md

@@ -15,6 +15,7 @@ Core Grammars:
 - enh(erlang) OTP25/27 maybe statement [nixxquality][]
 - enh(dart) Support digit-separators in number literals [Sam Rawlins][]
 - enh(csharp) add Contextual keywords `file`, `args`, `dynamic`, `record`, `required` and `scoped` [Alvin Joy][]
+- fix(c) - Fixed hex numbers with decimals  [Dxuian]
 - fix(ruby) - fix `|=` operator false positives (as block arguments) [Aboobacker MK]
 
 New Grammars:
@@ -42,6 +43,7 @@ CONTRIBUTORS
 [nixxquality]: https://github.com/nixxquality
 [srawlins]: https://github.com/srawlins
 [Alvin Joy]: https://github.com/alvinsjoy
+[Dxuian]:https://github.com/Dxuian
 [Aboobacker MK]: https://github.com/tachyons
 [Imken]: https://github.com/immccn123
 

src/languages/c.js

@@ -57,13 +57,14 @@ export default function(hljs) {
   const NUMBERS = {
     className: 'number',
     variants: [
-      { begin: '\\b(0b[01\']+)' },
-      { begin: '(-?)\\b([\\d\']+(\\.[\\d\']*)?|\\.[\\d\']+)((ll|LL|l|L)(u|U)?|(u|U)(ll|LL|l|L)?|f|F|b|B)' },
-      { begin: '(-?)(\\b0[xX][a-fA-F0-9\']+|(\\b[\\d\']+(\\.[\\d\']*)?|\\.[\\d\']+)([eE][-+]?[\\d\']+)?)' }
-    ],
+      { match: /\b(0b[01']+)/ },  
+      { match: /(-?)\b([\d']+(\.[\d']*)?|\.[\d']+)((ll|LL|l|L)(u|U)?|(u|U)(ll|LL|l|L)?|f|F|b|B)/ },  
+      { match: /(-?)\b(0[xX][a-fA-F0-9]+(?:'[a-fA-F0-9]+)*(?:\.[a-fA-F0-9]*(?:'[a-fA-F0-9]*)*)?(?:[pP][-+]?[0-9]+)?(l|L)?(u|U)?)/ },  
+      { match: /(-?)\b\d+(?:'\d+)*(?:\.\d*(?:'\d*)*)?(?:[eE][-+]?\d+)?/ }  
+  ],
     relevance: 0
-  };
-
+  };  
+  
   const PREPROCESSOR = {
     className: 'meta',
     begin: /#\s*[a-z]+\b/,

test/markup/c/number-literals.expect.txt

@@ -0,0 +1,46 @@
+<span class="hljs-comment">/* Floating-point literals. */</span>
+<span class="hljs-comment">// Decimal.</span>
+<span class="hljs-number">1.</span>
++<span class="hljs-number">12.</span>
+<span class="hljs-number">1.2</span>
+<span class="hljs-number">1234e56</span>
+
+<span class="hljs-comment">// Hexadecimal.</span>
+<span class="hljs-number">0x1p2</span>
++<span class="hljs-number">0x1.p2</span>
+<span class="hljs-number">-0X1A.P2</span>
+<span class="hljs-number">0x1.Ap2</span>
+
+<span class="hljs-comment">// Literal suffixes.</span>
+<span class="hljs-number">1.F</span>
+
+<span class="hljs-comment">/* Integer literals. */</span>
+<span class="hljs-comment">// Binary.</span>
++<span class="hljs-number">0b1</span> <span class="hljs-comment">// Note: Not standard C, but valid in some compilers</span>
+<span class="hljs-number">0B</span>01 <span class="hljs-comment">// Note: Not standard C, but valid in some compilers</span>
+
+<span class="hljs-comment">// Hexadecimal.</span>
++<span class="hljs-number">0x1</span>
+<span class="hljs-number">0X1A</span>
+
+<span class="hljs-comment">// Octal.</span>
++<span class="hljs-number">01</span>
+<span class="hljs-number">012</span>
+
+<span class="hljs-comment">// Decimal.</span>
+<span class="hljs-number">0</span>
++<span class="hljs-number">1</span>
+<span class="hljs-number">12</span>
+
+<span class="hljs-comment">// Literal suffixes.</span>
+<span class="hljs-number">0X2L</span>
+<span class="hljs-number">0x2l</span>
+<span class="hljs-number">03LL</span>
+<span class="hljs-number">03ll</span>
+<span class="hljs-number">4UL</span> <span class="hljs-number">4Ul</span> <span class="hljs-number">4uL</span> <span class="hljs-number">4ul</span>
+<span class="hljs-number">5LU</span> <span class="hljs-number">5Lu</span> <span class="hljs-number">5lU</span> <span class="hljs-number">5lu</span>
+<span class="hljs-number">6ULL</span> <span class="hljs-number">6Ull</span> <span class="hljs-number">6uLL</span> <span class="hljs-number">6ull</span>
+<span class="hljs-number">7LLU</span> <span class="hljs-number">7LLu</span> <span class="hljs-number">7llU</span> <span class="hljs-number">7llu</span>
+
+<span class="hljs-comment">// Character array.</span>
+<span class="hljs-type">char</span> word[] = { <span class="hljs-string">&#x27;3&#x27;</span>, <span class="hljs-string">&#x27;\0&#x27;</span> };

test/markup/c/number-literals.txt

@@ -0,0 +1,46 @@
+/* Floating-point literals. */
+// Decimal.
+1.
++12.
+1.2
+1234e56
+
+// Hexadecimal.
+0x1p2
++0x1.p2
+-0X1A.P2
+0x1.Ap2
+
+// Literal suffixes.
+1.F
+
+/* Integer literals. */
+// Binary.
++0b1 // Note: Not standard C, but valid in some compilers
+0B01 // Note: Not standard C, but valid in some compilers
+
+// Hexadecimal.
++0x1
+0X1A
+
+// Octal.
++01
+012
+
+// Decimal.
+0
++1
+12
+
+// Literal suffixes.
+0X2L
+0x2l
+03LL
+03ll
+4UL 4Ul 4uL 4ul
+5LU 5Lu 5lU 5lu
+6ULL 6Ull 6uLL 6ull
+7LLU 7LLu 7llU 7llu
+
+// Character array.
+char word[] = { '3', '\0' };