Sketch out parser/IR support for OperationInst, and a new Instruction base

class.

Introduce an Identifier class to MLIRContext to represent uniqued identifiers,
introduce string literal support to the lexer, introducing parser and printer
support etc.

PiperOrigin-RevId: 202592007

1 files changed, 10 insertions, 1 deletions

diff --git a/mlir/lib/Parser/Token.cpp b/mlir/lib/Parser/Token.cpp
index c721cf1d625..a8affc7f504 100644
--- a/mlir/lib/Parser/Token.cpp
+++ b/mlir/lib/Parser/Token.cpp
@@ -39,7 +39,7 @@ SMRange Token::getLocRange() const {
 
 /// For an integer token, return its value as an unsigned.  If it doesn't fit,
 /// return None.
-Optional<unsigned> Token::getUnsignedIntegerValue() {
+Optional<unsigned> Token::getUnsignedIntegerValue() const {
   bool isHex = spelling.size() > 1 && spelling[1] == 'x';
 
   unsigned result = 0;
@@ -47,3 +47,12 @@ Optional<unsigned> Token::getUnsignedIntegerValue() {
     return None;
   return result;
 }
+
+/// Given a 'string' token, return its value, including removing the quote
+/// characters and unescaping the contents of the string.
+std::string Token::getStringValue() const {
+  // TODO: Handle escaping.
+
+  // Just drop the quotes off for now.
+  return getSpelling().drop_front().drop_back().str();
+}