diff --git a/spec/compiler/build_tables/rule_can_be_blank_spec.cpp b/spec/compiler/build_tables/rule_can_be_blank_spec.cpp
new file mode 100644
index 00000000..312abf39
--- /dev/null
+++ b/spec/compiler/build_tables/rule_can_be_blank_spec.cpp
@@ -0,0 +1,23 @@
+#include "spec_helper.h"
+#include "rule_can_be_blank.h"
+
+using namespace rules;
+using build_tables::rule_can_be_blank;
+
+START_TEST
+
+describe("checking if rules can be blank", [&]() {
+    it("handles sequences", [&]() {
+        rule_ptr rule = seq({
+            choice({
+                str("x"),
+                blank(),
+            }),
+            str("y"),
+        });
+        
+        AssertThat(rule_can_be_blank(rule), Equals(false));
+    });
+});
+
+END_TEST
\ No newline at end of file
diff --git a/spec/compiler/build_tables/rule_transitions_spec.cpp b/spec/compiler/build_tables/rule_transitions_spec.cpp
index bc1511d4..16c6acfe 100644
--- a/spec/compiler/build_tables/rule_transitions_spec.cpp
+++ b/spec/compiler/build_tables/rule_transitions_spec.cpp
@@ -182,18 +182,5 @@ describe("rule transitions", []() {
     });
 });
 
-describe("checking if rules can be blank", [&]() {
-    it("handles sequences", [&]() {
-        rule_ptr rule = seq({
-            choice({
-                str("x"),
-                blank(),
-            }),
-            str("y"),
-        });
-        
-        AssertThat(rule_can_be_blank(rule), Equals(false));
-    });
-});
 
 END_TEST
diff --git a/spec/compiler/rules/rules_spec.cpp b/spec/compiler/rules/rules_spec.cpp
index d48477b6..2d497a55 100644
--- a/spec/compiler/rules/rules_spec.cpp
+++ b/spec/compiler/rules/rules_spec.cpp
@@ -1,5 +1,4 @@
 #include "spec_helper.h"
-#include "rule_transitions.h"
 
 using namespace rules;
 
diff --git a/src/compiler/build_tables/first_set.cpp b/src/compiler/build_tables/first_set.cpp
index d94fb2ec..474edbea 100644
--- a/src/compiler/build_tables/first_set.cpp
+++ b/src/compiler/build_tables/first_set.cpp
@@ -1,5 +1,5 @@
 #include "first_set.h"
-#include "rule_transitions.h"
+#include "rule_can_be_blank.h"
 #include "grammar.h"
 #include <vector>
 
diff --git a/src/compiler/build_tables/follow_sets.cpp b/src/compiler/build_tables/follow_sets.cpp
index 16f2ed9c..f209ccb6 100644
--- a/src/compiler/build_tables/follow_sets.cpp
+++ b/src/compiler/build_tables/follow_sets.cpp
@@ -1,6 +1,7 @@
 #include "follow_sets.h"
 #include "first_set.h"
 #include "rule_transitions.h"
+#include "rule_can_be_blank.h"
 #include "grammar.h"
 
 using std::map;
diff --git a/src/compiler/build_tables/item.cpp b/src/compiler/build_tables/item.cpp
index d6619053..7801da5a 100644
--- a/src/compiler/build_tables/item.cpp
+++ b/src/compiler/build_tables/item.cpp
@@ -1,6 +1,6 @@
 #include "item.h"
 #include "grammar.h"
-#include "rule_transitions.h"
+#include "rule_can_be_blank.h"
 
 using std::string;
 using std::to_string;
diff --git a/src/compiler/build_tables/rule_can_be_blank.cpp b/src/compiler/build_tables/rule_can_be_blank.cpp
new file mode 100644
index 00000000..271b9f5f
--- /dev/null
+++ b/src/compiler/build_tables/rule_can_be_blank.cpp
@@ -0,0 +1,39 @@
+#include "rule_can_be_blank.h"
+#include "rules.h"
+
+namespace tree_sitter  {
+    using namespace rules;
+
+    namespace build_tables {
+        class EpsilonVisitor : public rules::Visitor {
+        public:
+            bool value;
+            
+            void default_visit(const Rule *) {
+                value = false;
+            }
+            
+            void visit(const Blank *) {
+                value = true;
+            }
+            
+            void visit(const Choice *rule) {
+                value = rule_can_be_blank(rule->left) || rule_can_be_blank(rule->right);
+            }
+            
+            void visit(const Seq *rule) {
+                value = rule_can_be_blank(rule->left) && rule_can_be_blank(rule->right);
+            }
+            
+            void visit(const Repeat *rule) {
+                value = rule_can_be_blank(rule->content);
+            }
+        };
+        
+        bool rule_can_be_blank(const rule_ptr &rule) {
+            EpsilonVisitor visitor;
+            rule->accept(visitor);
+            return visitor.value;
+        }
+    }
+}
diff --git a/src/compiler/build_tables/rule_can_be_blank.h b/src/compiler/build_tables/rule_can_be_blank.h
new file mode 100644
index 00000000..5d235ee9
--- /dev/null
+++ b/src/compiler/build_tables/rule_can_be_blank.h
@@ -0,0 +1,12 @@
+#ifndef __tree_sitter__rule_can_be_blank__
+#define __tree_sitter__rule_can_be_blank__
+
+#include "rule.h"
+
+namespace tree_sitter {
+    namespace build_tables {
+        bool rule_can_be_blank(const rules::rule_ptr &rule);
+    }
+}
+
+#endif
diff --git a/src/compiler/build_tables/rule_transitions.cpp b/src/compiler/build_tables/rule_transitions.cpp
index 27048fdb..bd72421a 100644
--- a/src/compiler/build_tables/rule_transitions.cpp
+++ b/src/compiler/build_tables/rule_transitions.cpp
@@ -1,5 +1,6 @@
-#include "rule_transitions.h"
 #include "rules.h"
+#include "rule_transitions.h"
+#include "rule_can_be_blank.h"
 #include "merge_transitions.h"
 
 using namespace tree_sitter::rules;
@@ -107,36 +108,5 @@ namespace tree_sitter {
         map<Symbol, rule_ptr> sym_transitions(const rule_ptr &rule) {
             return TransitionsVisitor<Symbol>::transitions(rule);
         }
-
-        class EpsilonVisitor : public rules::Visitor {
-        public:
-            bool value;
-            
-            void default_visit(const Rule *) {
-                value = false;
-            }
-            
-            void visit(const Blank *) {
-                value = true;
-            }
-            
-            void visit(const Choice *rule) {
-                value = rule_can_be_blank(rule->left) || rule_can_be_blank(rule->right);
-            }
-            
-            void visit(const Seq *rule) {
-                value = rule_can_be_blank(rule->left) && rule_can_be_blank(rule->right);
-            }
-            
-            void visit(const Repeat *rule) {
-                value = rule_can_be_blank(rule->content);
-            }
-        };
-        
-        bool rule_can_be_blank(const rule_ptr &rule) {
-            EpsilonVisitor visitor;
-            rule->accept(visitor);
-            return visitor.value;
-        }
     }
 }
diff --git a/src/compiler/build_tables/rule_transitions.h b/src/compiler/build_tables/rule_transitions.h
index 287f431e..2f810f38 100644
--- a/src/compiler/build_tables/rule_transitions.h
+++ b/src/compiler/build_tables/rule_transitions.h
@@ -7,7 +7,6 @@
 
 namespace tree_sitter  {
     namespace build_tables {
-        bool rule_can_be_blank(const rules::rule_ptr &rule);
         std::map<rules::CharacterSet, rules::rule_ptr> char_transitions(const rules::rule_ptr &rule);
         std::map<rules::Symbol, rules::rule_ptr> sym_transitions(const rules::rule_ptr &rule);
     }
diff --git a/tree_sitter.xcodeproj/project.pbxproj b/tree_sitter.xcodeproj/project.pbxproj
index b22b737c..7bde2567 100644
--- a/tree_sitter.xcodeproj/project.pbxproj
+++ b/tree_sitter.xcodeproj/project.pbxproj
@@ -18,6 +18,8 @@
 		1251209B1830145300C9B56A /* rule.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1251209A1830145300C9B56A /* rule.cpp */; };
 		125120A4183083BD00C9B56A /* arithmetic.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 125120A3183083BD00C9B56A /* arithmetic.cpp */; };
 		12661BF418A1505A00A259FB /* character_set_spec.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 12661BF318A1505A00A259FB /* character_set_spec.cpp */; };
+		127528B318AACAAA006B682B /* rule_can_be_blank.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 127528B118AACAAA006B682B /* rule_can_be_blank.cpp */; };
+		127528B518AACB70006B682B /* rule_can_be_blank_spec.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 127528B418AACB70006B682B /* rule_can_be_blank_spec.cpp */; };
 		12AB465F188BD03E00DE79DF /* follow_sets.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 12AB465D188BD03E00DE79DF /* follow_sets.cpp */; };
 		12AB4661188CB3A300DE79DF /* item_set_closure_spec.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 12AB4660188CB3A300DE79DF /* item_set_closure_spec.cpp */; };
 		12BC470518822B27005AC502 /* parse_config.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 12BC470318822A17005AC502 /* parse_config.cpp */; };
@@ -102,6 +104,9 @@
 		125120A3183083BD00C9B56A /* arithmetic.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = arithmetic.cpp; path = spec/fixtures/grammars/arithmetic.cpp; sourceTree = SOURCE_ROOT; };
 		12661BF318A1505A00A259FB /* character_set_spec.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = character_set_spec.cpp; sourceTree = SOURCE_ROOT; };
 		127528AF18A6F9C6006B682B /* merge_transitions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = merge_transitions.h; sourceTree = "<group>"; };
+		127528B118AACAAA006B682B /* rule_can_be_blank.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = rule_can_be_blank.cpp; sourceTree = "<group>"; };
+		127528B218AACAAA006B682B /* rule_can_be_blank.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = rule_can_be_blank.h; sourceTree = "<group>"; };
+		127528B418AACB70006B682B /* rule_can_be_blank_spec.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = rule_can_be_blank_spec.cpp; sourceTree = "<group>"; };
 		12AB465D188BD03E00DE79DF /* follow_sets.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = follow_sets.cpp; sourceTree = "<group>"; };
 		12AB465E188BD03E00DE79DF /* follow_sets.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = follow_sets.h; sourceTree = "<group>"; };
 		12AB4660188CB3A300DE79DF /* item_set_closure_spec.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = item_set_closure_spec.cpp; sourceTree = "<group>"; };
@@ -233,6 +238,8 @@
 				12EDCFA518820137005A7A07 /* perform.h */,
 				12EDCFA618820137005A7A07 /* rule_transitions.cpp */,
 				12EDCFA718820137005A7A07 /* rule_transitions.h */,
+				127528B118AACAAA006B682B /* rule_can_be_blank.cpp */,
+				127528B218AACAAA006B682B /* rule_can_be_blank.h */,
 			);
 			path = build_tables;
 			sourceTree = "<group>";
@@ -244,6 +251,7 @@
 				12EDCFB7188205BA005A7A07 /* perform_spec.cpp */,
 				12BC470618830BC5005AC502 /* first_set_spec.cpp */,
 				12AB4660188CB3A300DE79DF /* item_set_closure_spec.cpp */,
+				127528B418AACB70006B682B /* rule_can_be_blank_spec.cpp */,
 			);
 			path = build_tables;
 			sourceTree = "<group>";
@@ -504,6 +512,7 @@
 				12130611182C3A1100FCF928 /* blank.cpp in Sources */,
 				12AB465F188BD03E00DE79DF /* follow_sets.cpp in Sources */,
 				1213060E182C398300FCF928 /* choice.cpp in Sources */,
+				127528B318AACAAA006B682B /* rule_can_be_blank.cpp in Sources */,
 				12F9A64E182DD5FD00FAF50C /* spec_helper.cpp in Sources */,
 				12EDCFB018820392005A7A07 /* item.cpp in Sources */,
 				12FD40F7186A16020041A84E /* lex_table.cpp in Sources */,
@@ -530,6 +539,7 @@
 				12EDCFB418820519005A7A07 /* compile.cpp in Sources */,
 				12BC470718830BC5005AC502 /* first_set_spec.cpp in Sources */,
 				1213060B182C389100FCF928 /* symbol.cpp in Sources */,
+				127528B518AACB70006B682B /* rule_can_be_blank_spec.cpp in Sources */,
 				1251209B1830145300C9B56A /* rule.cpp in Sources */,
 				27A343CA69E17E0F9EBEDF1C /* pattern.cpp in Sources */,
 			);