From 5bb19a8355890d6334d8fa4456da0a7ec455e0e1 Mon Sep 17 00:00:00 2001
From: Gajus Kuizinas <gajus@gajus.com>
Date: Sat, 1 Oct 2022 19:56:51 -0500
Subject: [PATCH] fix: support single character

---
 src/grammar.ne     |  2 +-
 src/grammar.ts     |  2 +-
 test/liqe/parse.ts | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/src/grammar.ne b/src/grammar.ne
index d78a0cf..4a2efad 100644
--- a/src/grammar.ne
+++ b/src/grammar.ne
@@ -292,4 +292,4 @@ regex_flags ->
   [gmiyusd]:+ {% d => d[0].join('') %}
 
 unquoted_value ->
-  [a-zA-Z_*@#$] [a-zA-Z\.\-_*@#$]:+ {% d => d[0] + d[1].join('') %}
\ No newline at end of file
+  [a-zA-Z_*@#$] [a-zA-Z\.\-_*@#$]:* {% d => d[0] + d[1].join('') %}
\ No newline at end of file
diff --git a/src/grammar.ts b/src/grammar.ts
index d6508eb..e86d7ac 100644
--- a/src/grammar.ts
+++ b/src/grammar.ts
@@ -298,7 +298,7 @@ const grammar: Grammar = {
     {"name": "regex_flags$ebnf$1", "symbols": [/[gmiyusd]/]},
     {"name": "regex_flags$ebnf$1", "symbols": ["regex_flags$ebnf$1", /[gmiyusd]/], "postprocess": (d) => d[0].concat([d[1]])},
     {"name": "regex_flags", "symbols": ["regex_flags$ebnf$1"], "postprocess": d => d[0].join('')},
-    {"name": "unquoted_value$ebnf$1", "symbols": [/[a-zA-Z\.\-_*@#$]/]},
+    {"name": "unquoted_value$ebnf$1", "symbols": []},
     {"name": "unquoted_value$ebnf$1", "symbols": ["unquoted_value$ebnf$1", /[a-zA-Z\.\-_*@#$]/], "postprocess": (d) => d[0].concat([d[1]])},
     {"name": "unquoted_value", "symbols": [/[a-zA-Z_*@#$]/, "unquoted_value$ebnf$1"], "postprocess": d => d[0] + d[1].join('')}
   ],
diff --git a/test/liqe/parse.ts b/test/liqe/parse.ts
index 1c5092b..5e64e0e 100644
--- a/test/liqe/parse.ts
+++ b/test/liqe/parse.ts
@@ -378,6 +378,41 @@ test('foo:bar', testQuery, {
   type: 'Tag',
 });
 
+test('foo:b', testQuery, {
+  expression: {
+    location: {
+      end: 5,
+      start: 4,
+    },
+    quoted: false,
+    type: 'LiteralExpression',
+    value: 'b',
+  },
+  field: {
+    location: {
+      end: 3,
+      start: 0,
+    },
+    name: 'foo',
+    path: ['foo'],
+    quoted: false,
+    type: 'Field',
+  },
+  location: {
+    end: 5,
+    start: 0,
+  },
+  operator: {
+    location: {
+      end: 4,
+      start: 3,
+    },
+    operator: ':',
+    type: 'ComparisonOperator',
+  },
+  type: 'Tag',
+});
+
 test('foo:bar@baz.com', testQuery, {
   expression: {
     location: {