From 0a6e5f9ee6e1a581a7254a6ceb93dde320261e6e Mon Sep 17 00:00:00 2001
From: Max Brunsfeld <maxbrunsfeld@gmail.com>
Date: Tue, 31 Jan 2017 11:46:28 -0800
Subject: [PATCH] Fix some build warnings on gcc

---
 src/compiler/build_tables/build_parse_table.cc | 3 ++-
 src/compiler/generate_code/c_code.cc           | 3 ++-
 src/compiler/rules/symbol.cc                   | 2 ++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/compiler/build_tables/build_parse_table.cc b/src/compiler/build_tables/build_parse_table.cc
index bdaac037..9fb6859f 100644
--- a/src/compiler/build_tables/build_parse_table.cc
+++ b/src/compiler/build_tables/build_parse_table.cc
@@ -583,7 +583,8 @@ class ParseTableBuilder {
       case Symbol::NonTerminal: {
         return grammar.variables[symbol.index].name;
       }
-      case Symbol::External: {
+      case Symbol::External:
+      default: {
         return grammar.external_tokens[symbol.index].name;
       }
     }
diff --git a/src/compiler/generate_code/c_code.cc b/src/compiler/generate_code/c_code.cc
index 2127078e..bc84e557 100644
--- a/src/compiler/generate_code/c_code.cc
+++ b/src/compiler/generate_code/c_code.cc
@@ -564,7 +564,8 @@ class CCodeGenerator {
         const Variable &variable = lexical_grammar.variables[symbol.index];
         return { variable.name, variable.type };
       }
-      case Symbol::External: {
+      case Symbol::External:
+      default: {
         const ExternalToken &token = syntax_grammar.external_tokens[symbol.index];
         return { token.name, token.type };
       }
diff --git a/src/compiler/rules/symbol.cc b/src/compiler/rules/symbol.cc
index 478de7cf..e826cb0f 100644
--- a/src/compiler/rules/symbol.cc
+++ b/src/compiler/rules/symbol.cc
@@ -41,6 +41,8 @@ string Symbol::to_string() const {
       return "(non-terminal " + std::to_string(index) + ")";
     case Symbol::External:
       return "(external " + std::to_string(index) + ")";
+    default:
+      return "(none)";
   }
 }