chore: add prismjs for syntax highlighting

1 files changed, 76 insertions, 0 deletions

diff --git a/public/prism/prism-sml.js b/public/prism/prism-sml.js
new file mode 100644
index 0000000..e4fcdc5
--- /dev/null
+++ b/public/prism/prism-sml.js
@@ -0,0 +1,76 @@
+// https://smlfamily.github.io/sml97-defn.pdf
+// https://people.mpi-sws.org/~rossberg/sml.html
+(function (Prism) {
+  var keywords =
+    /\b(?:abstype|and|andalso|as|case|datatype|do|else|end|eqtype|exception|fn|fun|functor|handle|if|in|include|infix|infixr|let|local|nonfix|of|op|open|orelse|raise|rec|sharing|sig|signature|struct|structure|then|type|val|where|while|with|withtype)\b/i;
+
+  Prism.languages.sml = {
+    // allow one level of nesting
+    comment:
+      /\(\*(?:[^*(]|\*(?!\))|\((?!\*)|\(\*(?:[^*(]|\*(?!\))|\((?!\*))*\*\))*\*\)/,
+    string: {
+      pattern: /#?"(?:[^"\\]|\\.)*"/,
+      greedy: true,
+    },
+
+    'class-name': [
+      {
+        // This is only an approximation since the real grammar is context-free
+        //
+        // Why the main loop so complex?
+        // The main loop is approximately the same as /(?:\s*(?:[*,]|->)\s*<TERMINAL>)*/ which is, obviously, a lot
+        // simpler. The difference is that if a comma is the last iteration of the loop, then the terminal must be
+        // followed by a long identifier.
+        pattern: RegExp(
+          /((?:^|[^:]):\s*)<TERMINAL>(?:\s*(?:(?:\*|->)\s*<TERMINAL>|,\s*<TERMINAL>(?:(?=<NOT-LAST>)|(?!<NOT-LAST>)\s+<LONG-ID>)))*/.source
+            .replace(/<NOT-LAST>/g, function () {
+              return /\s*(?:[*,]|->)/.source;
+            })
+            .replace(/<TERMINAL>/g, function () {
+              return /(?:'[\w']*|<LONG-ID>|\((?:[^()]|\([^()]*\))*\)|\{(?:[^{}]|\{[^{}]*\})*\})(?:\s+<LONG-ID>)*/
+                .source;
+            })
+            .replace(/<LONG-ID>/g, function () {
+              return /(?!<KEYWORD>)[a-z\d_][\w'.]*/.source;
+            })
+            .replace(/<KEYWORD>/g, function () {
+              return keywords.source;
+            }),
+          'i'
+        ),
+        lookbehind: true,
+        greedy: true,
+        inside: null, // see below
+      },
+      {
+        pattern:
+          /((?:^|[^\w'])(?:datatype|exception|functor|signature|structure|type)\s+)[a-z_][\w'.]*/i,
+        lookbehind: true,
+      },
+    ],
+    function: {
+      pattern: /((?:^|[^\w'])fun\s+)[a-z_][\w'.]*/i,
+      lookbehind: true,
+    },
+
+    keyword: keywords,
+    variable: {
+      pattern: /(^|[^\w'])'[\w']*/,
+      lookbehind: true,
+    },
+
+    number: /~?\b(?:\d+(?:\.\d+)?(?:e~?\d+)?|0x[\da-f]+)\b/i,
+    word: {
+      pattern: /\b0w(?:\d+|x[\da-f]+)\b/i,
+      alias: 'constant',
+    },
+
+    boolean: /\b(?:false|true)\b/i,
+    operator: /\.\.\.|:[>=:]|=>?|->|[<>]=?|[!+\-*/^#|@~]/,
+    punctuation: /[(){}\[\].:,;]/,
+  };
+
+  Prism.languages.sml['class-name'][0].inside = Prism.languages.sml;
+
+  Prism.languages.smlnj = Prism.languages.sml;
+})(Prism);