[MLIR][AsmParser] Add parse method for minus token

Author: BourgerieQuentin

mlir/include/mlir/IR/OpImplementation.h

@@ -549,6 +549,12 @@ class AsmParser {
   /// Parse a '?' token if present.
   virtual ParseResult parseOptionalQuestion() = 0;
 
+  /// Parse a '-' token.
+  virtual ParseResult parseMinus() = 0;
+
+  /// Parse a '-' token if present.
+  virtual ParseResult parseOptionalMinus() = 0;
+
   /// Parse a '+' token.
   virtual ParseResult parsePlus() = 0;
 

mlir/lib/AsmParser/AsmParserImpl.h

@@ -216,6 +216,16 @@ class AsmParserImpl : public BaseT {
     return success(parser.consumeIf(Token::star));
   }
 
+  /// Parses a '-' token.
+  ParseResult parseMinus() override {
+    return parser.parseToken(Token::minus, "expected '-'");
+  }
+
+  /// Parses a '-' token if present.
+  ParseResult parseOptionalMinus() override {
+    return success(parser.consumeIf(Token::minus));
+  }
+
   /// Parses a '+' token.
   ParseResult parsePlus() override {
     return parser.parseToken(Token::plus, "expected '+'");