Improvement: Replaced "priority" with TokenType

* Made implementation more expressive by replacing the integer priority with an strictly typed enum called TokenType
** Made removal of character comparisons from tree construction and lexer possible
* As a side effect distinct numbers had to be assigned to each token
** Operators of same priority do not have identical numbers anymore

1 files changed, 12 insertions, 1 deletions

diff --git a/src/utils.h b/src/utils.h
index f71c835..6e43605 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -8,7 +8,18 @@
 
 namespace SimpleParser {
 
-int8_t getPriority(char);
+enum class TokenType : int8_t {
+	OPERATOR_PLUS     = 10,
+	OPERATOR_MINUS    = 11,
+	OPERATOR_DIVIDE   = 20,
+	OPERATOR_MULTIPLY = 21,
+	OPERATOR_POWER    = 30,
+	PARENTHESES_OPEN  = 90,
+	PARENTHESES_CLOSE = 91,
+	VALUE_NUMBER      = -1,
+};
+
+TokenType getTokenType(char);
 std::vector<std::string> lexer(std::string);
 
 }