support literal suffixes

crates/ra_syntax/src/validation/byte.rs

@@ -27,6 +27,10 @@ pub(super) fn validate_byte_node(node: ast::Byte, errors: &mut Vec<SyntaxError>)
         errors.push(SyntaxError::new(UnclosedByte, literal_range));
     }
 
+    if let Some(range) = components.suffix {
+        errors.push(SyntaxError::new(InvalidSuffix, range));
+    }
+
     if len == 0 {
         errors.push(SyntaxError::new(EmptyByte, literal_range));
     }

crates/ra_syntax/src/validation/byte_string.rs

@@ -32,6 +32,10 @@ pub(crate) fn validate_byte_string_node(node: ast::ByteString, errors: &mut Vec<
     if !components.has_closing_quote {
         errors.push(SyntaxError::new(UnclosedString, literal_range));
     }
+
+    if let Some(range) = components.suffix {
+        errors.push(SyntaxError::new(InvalidSuffix, range));
+    }
 }
 
 #[cfg(test)]

crates/ra_syntax/src/validation/char.rs

@@ -30,6 +30,10 @@ pub(super) fn validate_char_node(node: ast::Char, errors: &mut Vec<SyntaxError>)
         errors.push(SyntaxError::new(UnclosedChar, literal_range));
     }
 
+    if let Some(range) = components.suffix {
+        errors.push(SyntaxError::new(InvalidSuffix, range));
+    }
+
     if len == 0 {
         errors.push(SyntaxError::new(EmptyChar, literal_range));
     }

crates/ra_syntax/src/validation/string.rs

@@ -27,6 +27,10 @@ pub(crate) fn validate_string_node(node: ast::String, errors: &mut Vec<SyntaxErr
     if !components.has_closing_quote {
         errors.push(SyntaxError::new(UnclosedString, literal_range));
     }
+
+    if let Some(range) = components.suffix {
+        errors.push(SyntaxError::new(InvalidSuffix, range));
+    }
 }
 
 #[cfg(test)]