lexer: handle identifiers

2 files changed, 11 insertions, 0 deletions

diff --git a/include/lexer.h b/include/lexer.h
index 8122848..4605142 100644
--- a/include/lexer.h
+++ b/include/lexer.h
@@ -27,6 +27,7 @@ private:
 private:
   void string(void);
   void number(void);
+  void identifier(void);
 
 private:
   void add_token(token_type_e type);
diff --git a/include/token.h b/include/token.h
index 176ff27..92106a2 100644
--- a/include/token.h
+++ b/include/token.h
@@ -45,9 +45,19 @@
 #define GENERATE_ENUM(ENUM) ENUM,
 #define GENERATE_STRING(STRING) #STRING,
 
+#define N_KEYWORDS 16
+
 typedef enum { FOREACH_TOKEN(GENERATE_ENUM) } token_type_e;
 static const char *TOKEN_STRING[] = { FOREACH_TOKEN(GENERATE_STRING) };
 
+static const char *KEYWORD_STRING_MAPPING[N_KEYWORDS]
+    = { "and", "class", "else",   "false", "for",  "fun",  "if",  "nil",
+        "or",  "print", "return", "super", "this", "true", "var", "while" };
+
+static const token_type_e KEYWORD_TYPE_MAPPING[N_KEYWORDS]
+    = { AND, CLASS, ELSE,   FALSE, FOR,  FUN,  IF,  NIL,
+        OR,  PRINT, RETURN, SUPER, THIS, TRUE, VAR, WHILE };
+
 class Token
 {
 private: