web: add /kripke

packages/kripke/parser.ts

@@ -146,3 +146,11 @@ EXP.setPattern(
 export function parse(expr: string): Formula {
   return expectSingleResult(expectEOF(EXP.parse(lexer.parse(expr))));
 }
+
+export function tryParse(expr: string): Formula | undefined {
+  try {
+    return parse(expr);
+  } catch {
+    return undefined;
+  }
+}

packages/kripke/syntax.ts

@@ -79,11 +79,11 @@ export const unicodeSymbols: Symbols = {
 };
 
 export const latexSymbols: Symbols = {
-  top: "\\top",
-  bot: "\\bot",
-  box: "\\Box",
-  diamond: "\\Diamond",
-  not: "\\neg",
+  top: "\\top ",
+  bot: "\\bot ",
+  box: "\\Box ",
+  diamond: "\\Diamond ",
+  not: "\\neg ",
   and: "\\land",
   or: "\\lor",
   to: "\\to",