Add initial Skylark byte code generation code.

Does not yet contain any implementation for expressions and statements
but sets up various needed mechanisms and helper classes.

--
MOS_MIGRATED_REVID=107222845

1 files changed, 14 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/syntax/LoadStatement.java b/src/main/java/com/google/devtools/build/lib/syntax/LoadStatement.java
index d85907ef53..33c98d3081 100644
--- a/src/main/java/com/google/devtools/build/lib/syntax/LoadStatement.java
+++ b/src/main/java/com/google/devtools/build/lib/syntax/LoadStatement.java
@@ -14,10 +14,16 @@
 package com.google.devtools.build.lib.syntax;
 
 import com.google.common.base.Joiner;
+import com.google.common.base.Optional;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
+import com.google.devtools.build.lib.syntax.compiler.DebugInfo;
+import com.google.devtools.build.lib.syntax.compiler.LoopLabels;
+import com.google.devtools.build.lib.syntax.compiler.VariableScope;
 import com.google.devtools.build.lib.vfs.PathFragment;
 
+import net.bytebuddy.implementation.bytecode.ByteCodeAppender;
+
 import java.util.Map;
 
 /**
@@ -119,4 +125,12 @@ public final class LoadStatement extends Statement {
       throw new EvalException(getLocation(), error);
     }
   }
+
+  @Override
+  ByteCodeAppender compile(
+      VariableScope scope, Optional<LoopLabels> loopLabels, DebugInfo debugInfo) {
+    throw new UnsupportedOperationException(
+        "load statements should never appear in method bodies and"
+            + " should never be compiled in general");
+  }
 }