diff --git a/spec/compiler/rules/choice_spec.cc b/spec/compiler/rules/choice_spec.cc
index 36d1ddb0..b5c5e273 100644
--- a/spec/compiler/rules/choice_spec.cc
+++ b/spec/compiler/rules/choice_spec.cc
@@ -8,7 +8,7 @@ START_TEST
 describe("Choice", []() {
   describe("constructing choices", [&]() {
     it("eliminates duplicate members", [&]() {
-      auto rule = Choice::Build({
+      auto rule = Choice::build({
         seq({ sym("one"), sym("two") }),
         sym("three"),
         seq({ sym("one"), sym("two") })
@@ -21,9 +21,9 @@ describe("Choice", []() {
     });
 
     it("eliminates duplicates within nested choices", [&]() {
-      auto rule = Choice::Build({
+      auto rule = Choice::build({
         seq({ sym("one"), sym("two") }),
-        Choice::Build({
+        Choice::build({
           sym("three"),
           seq({ sym("one"), sym("two") })
         })
@@ -36,9 +36,9 @@ describe("Choice", []() {
     });
 
     it("doesn't construct a choice if there's only one unique member", [&]() {
-      auto rule = Choice::Build({
+      auto rule = Choice::build({
         sym("one"),
-        Choice::Build({
+        Choice::build({
           sym("one"),
         })
       });
diff --git a/src/compiler/build_tables/build_lex_table.cc b/src/compiler/build_tables/build_lex_table.cc
index e41952a4..ac2155e1 100644
--- a/src/compiler/build_tables/build_lex_table.cc
+++ b/src/compiler/build_tables/build_lex_table.cc
@@ -118,7 +118,7 @@ class LexTableBuilder {
   }
 
   rules::rule_ptr after_separators(rules::rule_ptr rule) {
-    return rules::Seq::Build(
+    return rules::Seq::build(
         { make_shared<rules::Metadata>(
               separator_rule(),
               map<rules::MetadataKey, int>(
diff --git a/src/compiler/build_tables/rule_transitions.cc b/src/compiler/build_tables/rule_transitions.cc
index cbc6c4c8..597aecd8 100644
--- a/src/compiler/build_tables/rule_transitions.cc
+++ b/src/compiler/build_tables/rule_transitions.cc
@@ -25,7 +25,7 @@ void merge_transitions(map<T, rule_ptr> *, const map<T, rule_ptr> &);
 
 struct MergeAsChoice {
   void operator()(rule_ptr *left, const rule_ptr *right) {
-    *left = Choice::Build({ *left, *right });
+    *left = Choice::build({ *left, *right });
   }
 };
 
@@ -72,7 +72,7 @@ class RuleTransitions : public rules::RuleFn<map<T, rule_ptr>> {
   map<T, rule_ptr> apply_to(const rules::Seq *rule) {
     auto result = this->apply(rule->left);
     for (auto &pair : result)
-      pair.second = rules::Seq::Build({ pair.second, rule->right });
+      pair.second = rules::Seq::build({ pair.second, rule->right });
     if (rule_can_be_blank(rule->left))
       merge_transitions<T>(&result, this->apply(rule->right));
     return result;
@@ -81,7 +81,7 @@ class RuleTransitions : public rules::RuleFn<map<T, rule_ptr>> {
   map<T, rule_ptr> apply_to(const rules::Repeat *rule) {
     auto result = this->apply(rule->content);
     for (auto &pair : result)
-      pair.second = rules::Seq::Build({ pair.second, rule->copy() });
+      pair.second = rules::Seq::build({ pair.second, rule->copy() });
     return result;
   }
 
diff --git a/src/compiler/prepare_grammar/expand_repeats.cc b/src/compiler/prepare_grammar/expand_repeats.cc
index 9e8f4349..4273d153 100644
--- a/src/compiler/prepare_grammar/expand_repeats.cc
+++ b/src/compiler/prepare_grammar/expand_repeats.cc
@@ -37,9 +37,9 @@ class ExpandRepeats : public rules::IdentityRuleFn {
         make_shared<Symbol>(offset + index, rules::SymbolOptionAuxiliary);
     aux_rules.push_back(
         { helper_rule_name,
-          Seq::Build({ inner_rule, Choice::Build({ repeat_symbol,
+          Seq::build({ inner_rule, Choice::build({ repeat_symbol,
                                                    make_shared<Blank>() }) }) });
-    return Choice::Build({ repeat_symbol, make_shared<Blank>() });
+    return Choice::build({ repeat_symbol, make_shared<Blank>() });
   }
 
  public:
diff --git a/src/compiler/prepare_grammar/expand_tokens.cc b/src/compiler/prepare_grammar/expand_tokens.cc
index f52de48b..71fef522 100644
--- a/src/compiler/prepare_grammar/expand_tokens.cc
+++ b/src/compiler/prepare_grammar/expand_tokens.cc
@@ -41,7 +41,7 @@ class ExpandTokens : public rules::IdentityRuleFn {
       elements.push_back(rules::CharacterSet().include(el).copy());
     }
 
-    return rules::Seq::Build(elements);
+    return rules::Seq::build(elements);
   }
 
   rule_ptr apply_to(const Pattern *rule) {
diff --git a/src/compiler/prepare_grammar/parse_regex.cc b/src/compiler/prepare_grammar/parse_regex.cc
index 2d3e2414..d71e900c 100644
--- a/src/compiler/prepare_grammar/parse_regex.cc
+++ b/src/compiler/prepare_grammar/parse_regex.cc
@@ -64,7 +64,7 @@ class PatternParser {
       auto pair = factor();
       if (pair.second)
         return { blank(), pair.second };
-      result = Seq::Build({ result, pair.first });
+      result = Seq::build({ result, pair.first });
     } while (has_more_input());
     return { result, nullptr };
   }
@@ -86,7 +86,7 @@ class PatternParser {
           break;
         case '?':
           next();
-          result = Choice::Build({ result, make_shared<Blank>() });
+          result = Choice::build({ result, make_shared<Blank>() });
           break;
       }
     }
diff --git a/src/compiler/rules/choice.cc b/src/compiler/rules/choice.cc
index 1e1580be..15b3e76c 100644
--- a/src/compiler/rules/choice.cc
+++ b/src/compiler/rules/choice.cc
@@ -27,7 +27,7 @@ void add_choice_element(vector<rule_ptr> *vec, const rule_ptr new_rule) {
   }
 }
 
-rule_ptr Choice::Build(const vector<rule_ptr> &inputs) {
+rule_ptr Choice::build(const vector<rule_ptr> &inputs) {
   vector<rule_ptr> elements;
   for (auto &el : inputs)
     add_choice_element(&elements, el);
diff --git a/src/compiler/rules/choice.h b/src/compiler/rules/choice.h
index 5f971db1..761ce8a7 100644
--- a/src/compiler/rules/choice.h
+++ b/src/compiler/rules/choice.h
@@ -11,7 +11,7 @@ namespace rules {
 class Choice : public Rule {
  public:
   explicit Choice(const std::vector<rule_ptr> &elements);
-  static rule_ptr Build(const std::vector<rule_ptr> &rules);
+  static rule_ptr build(const std::vector<rule_ptr> &rules);
 
   bool operator==(const Rule &other) const;
   size_t hash_code() const;
diff --git a/src/compiler/rules/rules.cc b/src/compiler/rules/rules.cc
index 41a3e966..d0970846 100644
--- a/src/compiler/rules/rules.cc
+++ b/src/compiler/rules/rules.cc
@@ -32,13 +32,13 @@ static rule_ptr metadata(rule_ptr rule, map<MetadataKey, int> values) {
 
 rule_ptr blank() { return make_shared<Blank>(); }
 
-rule_ptr choice(const vector<rule_ptr> &rules) { return Choice::Build(rules); }
+rule_ptr choice(const vector<rule_ptr> &rules) { return Choice::build(rules); }
 
 rule_ptr repeat(const rule_ptr &content) {
   return std::make_shared<Repeat>(content);
 }
 
-rule_ptr seq(const vector<rule_ptr> &rules) { return Seq::Build(rules); }
+rule_ptr seq(const vector<rule_ptr> &rules) { return Seq::build(rules); }
 
 rule_ptr sym(const string &name) { return make_shared<NamedSymbol>(name); }
 
diff --git a/src/compiler/rules/seq.cc b/src/compiler/rules/seq.cc
index d83ee0a1..bd5aa06b 100644
--- a/src/compiler/rules/seq.cc
+++ b/src/compiler/rules/seq.cc
@@ -12,7 +12,7 @@ using std::vector;
 
 Seq::Seq(rule_ptr left, rule_ptr right) : left(left), right(right) {}
 
-rule_ptr Seq::Build(const std::vector<rule_ptr> &rules) {
+rule_ptr Seq::build(const std::vector<rule_ptr> &rules) {
   rule_ptr result = make_shared<Blank>();
   for (auto &rule : rules)
     result = (typeid(*result) != typeid(Blank)) ? make_shared<Seq>(result, rule)
diff --git a/src/compiler/rules/seq.h b/src/compiler/rules/seq.h
index fa625d06..29238848 100644
--- a/src/compiler/rules/seq.h
+++ b/src/compiler/rules/seq.h
@@ -11,7 +11,7 @@ namespace rules {
 class Seq : public Rule {
  public:
   Seq(rule_ptr left, rule_ptr right);
-  static rule_ptr Build(const std::vector<rule_ptr> &rules);
+  static rule_ptr build(const std::vector<rule_ptr> &rules);
 
   bool operator==(const Rule &other) const;
   size_t hash_code() const;
diff --git a/src/compiler/rules/visitor.cc b/src/compiler/rules/visitor.cc
index f0bdc3c3..da2e4c82 100644
--- a/src/compiler/rules/visitor.cc
+++ b/src/compiler/rules/visitor.cc
@@ -25,11 +25,11 @@ rule_ptr IdentityRuleFn::apply_to(const Choice *rule) {
   vector<rule_ptr> rules;
   for (const auto &el : rule->elements)
     rules.push_back(apply(el));
-  return Choice::Build(rules);
+  return Choice::build(rules);
 }
 
 rule_ptr IdentityRuleFn::apply_to(const Seq *rule) {
-  return Seq::Build({ apply(rule->left), apply(rule->right) });
+  return Seq::build({ apply(rule->left), apply(rule->right) });
 }
 
 rule_ptr IdentityRuleFn::apply_to(const Repeat *rule) {