fix: number regex (#41)

Author: erikn69

index.test.js

@@ -70,6 +70,11 @@ describe('unicode', () => {
       .toBe("[string]'34'[clear]")
   })
 
+  it('alphanumeric', () => {
+    expect(hlUni('(f1)'))
+      .toBe('[bracket]([clear]f1[bracket])[clear]')
+  })
+
   it('functions', () => {
     expect(hlUni('COUNT(`id`)'))
       .toBe('[function]COUNT[clear][bracket]([clear][string]`id`[clear][bracket])[clear]')
@@ -132,6 +137,11 @@ describe('html', () => {
       .toBe("<span class=\"sql-hl-string\">'34'</span>")
   })
 
+  it('alphanumeric', () => {
+    expect(hlHtml('(f1)'))
+      .toBe('<span class="sql-hl-bracket">(</span>f1<span class="sql-hl-bracket">)</span>')
+  })
+
   it('functions', () => {
     expect(hlHtml('COUNT(`id`)'))
       .toBe('<span class="sql-hl-function">COUNT</span><span class="sql-hl-bracket">(</span><span class="sql-hl-string">`id`</span><span class="sql-hl-bracket">)</span>')

lib/index.js

@@ -35,7 +35,7 @@ const highlighters = [
   },
   {
     name: 'number',
-    regex: /(\d+(?:\.\d+)?)/g
+    regex: /((?<![a-zA-z])\d+(?:\.\d+)?)/g
   },
   {
     name: 'string',

test/index.js

@@ -14,6 +14,7 @@ console.log(highlight("SELECT COUNT(id), `id`, `username` FROM `users` WHERE `em
 console.log(highlight('SELECT id FROM users'))
 
 console.log(highlight('WITH t1 AS (SELECT data_point FROM tablename) SELECT data_point FROM t1;'))
+console.log(highlight('SELECT f1, f20b, f3a, -1, 1, "1", 1.00 FROM t1;'))
 
 console.log(highlight('SELECT id FROM listings WHERE status = \'not available\''))
 console.log(highlight('SELECT id FROM listings WHERE status = "not available"'))