init parser with nearley

package-lock.json

@@ -4857,6 +4857,11 @@
         }
       }
     },
+    "discontinuous-range": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/discontinuous-range/-/discontinuous-range-1.0.0.tgz",
+      "integrity": "sha1-44Mx8IRLukm5qctxx3FYWqsbxlo="
+    },
     "dns-equal": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/dns-equal/-/dns-equal-1.0.0.tgz",
@@ -10087,6 +10092,18 @@
       "resolved": "https://registry.npmjs.org/natural-compare/-/natural-compare-1.4.0.tgz",
       "integrity": "sha1-Sr6/7tdUHywnrPspvbvRXI1bpPc="
     },
+    "nearley": {
+      "version": "2.19.1",
+      "resolved": "https://registry.npmjs.org/nearley/-/nearley-2.19.1.tgz",
+      "integrity": "sha512-xq47GIUGXxU9vQg7g/y1o1xuKnkO7ev4nRWqftmQrLkfnE/FjRqDaGOUakM8XHPn/6pW3bGjU2wgoJyId90rqg==",
+      "requires": {
+        "commander": "^2.19.0",
+        "moo": "^0.5.0",
+        "railroad-diagrams": "^1.0.0",
+        "randexp": "0.4.6",
+        "semver": "^5.4.1"
+      }
+    },
     "negotiator": {
       "version": "0.6.2",
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.2.tgz",
@@ -12174,6 +12191,20 @@
         "performance-now": "^2.1.0"
       }
     },
+    "railroad-diagrams": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/railroad-diagrams/-/railroad-diagrams-1.0.0.tgz",
+      "integrity": "sha1-635iZ1SN3t+4mcG5Dlc3RVnN234="
+    },
+    "randexp": {
+      "version": "0.4.6",
+      "resolved": "https://registry.npmjs.org/randexp/-/randexp-0.4.6.tgz",
+      "integrity": "sha512-80WNmd9DA0tmZrw9qQa62GPPWfuXJknrmVmLcxvq4uZBdYqb1wYoKTmnlGUchvVWe0XiLupYkBoXVOxz3C8DYQ==",
+      "requires": {
+        "discontinuous-range": "1.0.0",
+        "ret": "~0.1.10"
+      }
+    },
     "randombytes": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/randombytes/-/randombytes-2.1.0.tgz",

package.json

@@ -8,6 +8,7 @@
     "gh-pages": "^2.2.0",
     "local-storage": "^2.0.0",
     "moo": "^0.5.1",
+    "nearley": "^2.19.1",
     "node-sass": "^4.13.1",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
@@ -16,6 +17,7 @@
   },
   "scripts": {
     "start": "react-scripts start",
+    "compile-grammar": "nearleyc src/utils/grammar.ne -o src/utils/grammar.js",
     "flow": "flow",
     "build": "react-scripts build",
     "test": "react-scripts test",

src/utils/grammar.js

@@ -0,0 +1,25 @@
+// Generated automatically by nearley, version 2.19.1
+// http://github.com/Hardmath123/nearley
+(function () {
+function id(x) { return x[0]; }
+var grammar = {
+  Lexer: undefined,
+  ParserRules: [
+  {"name": "main$ebnf$1$subexpression$1", "symbols": ["statement", {"literal":"\n"}]},
+  {"name": "main$ebnf$1", "symbols": ["main$ebnf$1$subexpression$1"]},
+  {"name": "main$ebnf$1$subexpression$2", "symbols": ["statement", {"literal":"\n"}]},
+  {"name": "main$ebnf$1", "symbols": ["main$ebnf$1", "main$ebnf$1$subexpression$2"], "postprocess": function arrpush(d) {return d[0].concat([d[1]]);}},
+  {"name": "main", "symbols": ["main$ebnf$1"]},
+  {"name": "statement$string$1", "symbols": [{"literal":"f"}, {"literal":"o"}, {"literal":"o"}], "postprocess": function joiner(d) {return d.join('');}},
+  {"name": "statement", "symbols": ["statement$string$1"]},
+  {"name": "statement$string$2", "symbols": [{"literal":"b"}, {"literal":"a"}, {"literal":"r"}], "postprocess": function joiner(d) {return d.join('');}},
+  {"name": "statement", "symbols": ["statement$string$2"]}
+]
+  , ParserStart: "main"
+}
+if (typeof module !== 'undefined'&& typeof module.exports !== 'undefined') {
+  module.exports = grammar;
+} else {
+  window.grammar = grammar;
+}
+})();

src/utils/grammar.ne

@@ -0,0 +1,2 @@
+main -> (statement "\n"):+
+statement -> "foo" | "bar"

src/utils/parser.js

@@ -0,0 +1,4 @@
+const nearley = require("nearley");
+const grammar = require("./grammar.js");
+
+const parser = new nearley.Parser(nearley.Grammar.fromCompiled(grammar));