Add parsing for floating point attributes.

This is doing it in a suboptimal manner by recombining [integer period literal] into a string literal and parsing that via to_float.

PiperOrigin-RevId: 206855106

1 files changed, 8 insertions, 1 deletions

diff --git a/mlir/lib/Parser/Token.cpp b/mlir/lib/Parser/Token.cpp
index 2d78168d83d..9fc2b2f40d1 100644
--- a/mlir/lib/Parser/Token.cpp
+++ b/mlir/lib/Parser/Token.cpp
@@ -58,6 +58,14 @@ Optional<uint64_t> Token::getUInt64IntegerValue() const {
   return result;
 }
 
+/// For a floatliteral, return its value as a double. Return None if the value
+/// underflows or overflows.
+Optional<double> Token::getFloatingPointValue() const {
+  double result = 0;
+  if (spelling.getAsDouble(result))
+    return None;
+  return result;
+}
 
 /// For an inttype token, return its bitwidth.
 Optional<unsigned> Token::getIntTypeBitwidth() const {
@@ -70,7 +78,6 @@ Optional<unsigned> Token::getIntTypeBitwidth() const {
   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 {