removed LetQuery implementation

Author: chios202

mlir/lib/Query/Query.cpp

@@ -127,15 +127,6 @@ LogicalResult QuitQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
   return mlir::success();
 }
 
-LogicalResult LetQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
-  if (value.hasValue()) {
-    qs.namedValues[name] = value;
-  } else {
-    qs.namedValues.erase(name);
-  }
-  return mlir::success();
-}
-
 LogicalResult MatchQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
   Operation *rootOp = qs.getRootOp();
 

mlir/lib/Query/QueryParser.cpp

@@ -166,8 +166,6 @@ QueryRef QueryParser::doParse() {
           .Case("", ParsedQueryKind::NoOp)
           .Case("#", ParsedQueryKind::Comment, /*isCompletion=*/false)
           .Case("help", ParsedQueryKind::Help)
-          .Case("l", ParsedQueryKind::Let, /*isCompletion=*/false)
-          .Case("let", ParsedQueryKind::Let, /*isCompletion=*/false)
           .Case("m", ParsedQueryKind::Match, /*isCompletion=*/false)
           .Case("set", ParsedQueryKind::Set)
           .Case("match", ParsedQueryKind::Match)
@@ -189,28 +187,6 @@ QueryRef QueryParser::doParse() {
 
   case ParsedQueryKind::Quit:
     return endQuery(new QuitQuery);
-
-  case ParsedQueryKind::Let: {
-    llvm::StringRef name = lexWord();
-
-    if (name.empty()) {
-      return new InvalidQuery("expected variable name");
-    }
-
-    if (completionPos) {
-      return completeMatcherExpression();
-    }
-
-    matcher::internal::Diagnostics diag;
-    matcher::VariantValue value;
-    if (!matcher::internal::Parser::parseExpression(
-            line, qs.getRegistryData(), &qs.namedValues, &value, &diag)) {
-      return makeInvalidQueryFromDiagnostics(diag);
-    }
-    QueryRef query = new LetQuery(name, value);
-    query->remainingContent = line;
-    return query;
-  }
   case ParsedQueryKind::Match: {
     if (completionPos) {
       return completeMatcherExpression();