Added support for DAX (#2248)

This adds support for DAX (Data Analysis Expressions).
https://docs.microsoft.com/en-us/dax/

components.json

@@ -252,6 +252,10 @@
 			"require": "clike",
 			"owner": "Golmote"
 		},
+		"dax": {
+			"title": "DAX",
+			"owner": "peterbud"
+		},
 		"diff": {
 			"title": "Diff",
 			"owner": "uranusjr"

examples/prism-dax.html

@@ -0,0 +1,39 @@
+<h2>Comments</h2>
+<pre><code>// This is a comment</code></pre>
+<h2>Simple example</h2>
+<pre><code>
+Sales YTD := 
+CALCULATE (
+    [Sales Amount], 
+    DATESYTD( 'Date'[Date] )
+)
+</code></pre>
+<h2>Full example</h2>
+<pre><code>
+Burn Rate (Hours) = 
+
+// Only consider those projects which have been alread created
+VAR filterDate = 
+    FILTER (
+        ALL ( 'Date'[Date] ),
+        'Date'[Date] &lt;= MAX('Date'[Date])
+    )
+
+RETURN
+IF (
+    // Show blank for months before project start
+    MAX ( 'Project'[Project Created Relative Months Pos] ) &lt; SELECTEDVALUE ( 'Date'[Fiscal RelativeMonthPos] ),
+    BLANK (),
+    MIN(
+        1,
+        DIVIDE (
+            // Add 0 to consider months with no hours
+            [Hours Actual Billable] + 0,
+            CALCULATE (
+                [Planned Hours] + 0,
+                filterDate
+            )
+        )
+    )
+)
+</code></pre>

plugins/show-language/prism-show-language.js

@@ -48,6 +48,7 @@
 		"cmake": "CMake",
 		"csp": "Content-Security-Policy",
 		"css-extras": "CSS Extras",
+		"dax": "DAX",
 		"django": "Django/Jinja2",
 		"jinja2": "Django/Jinja2",
 		"dns-zone-file": "DNS zone file",

tests/languages/dax/boolean_feature.test

@@ -0,0 +1,15 @@
+TRUE
+FALSE
+NULL
+
+----------------------------------------------------
+
+[
+	["boolean", "TRUE"],
+	["boolean", "FALSE"],
+	["boolean", "NULL"]
+]
+
+----------------------------------------------------
+
+Checks for booleans.

tests/languages/dax/comment_feature.test

@@ -0,0 +1,21 @@
+/**/
+/* foo
+bar */
+//
+// foo
+--
+-- foo
+----------------------------------------------------
+
+[
+	["comment", "/**/"],
+	["comment", "/* foo\r\nbar */"],
+	["comment", "//"],
+	["comment", "// foo"],
+	["comment", "--"],
+	["comment", "-- foo"]
+]
+
+----------------------------------------------------
+
+Checks for comments.

tests/languages/dax/datafield_feature.test

@@ -0,0 +1,29 @@
+'table'[field]
+'table name'[field]
+'ta""ble'[field]
+'ta''ble'[field]
+'table'[field name]
+'table name'[field name]
+table[field]
+table[field name]
+'table'
+'こんにちは'
+
+----------------------------------------------------
+
+[
+	["data-field", "'table'[field]"],
+	["data-field", "'table name'[field]"],
+	["data-field", "'ta\"\"ble'[field]"],
+	["data-field", "'ta''ble'[field]"],
+	["data-field", "'table'[field name]"],
+	["data-field", "'table name'[field name]"],
+	["data-field", "table[field]"],
+	["data-field", "table[field name]"],
+	["data-field", "'table'"],
+	["data-field", "'こんにちは'"]
+]
+
+----------------------------------------------------
+
+Checks for datafield tokens.