Convert codebase to C89 compatibility and update test scripts

v0/token.h

@@ -10,41 +10,41 @@
  * A list of all possible tokens.
  */
 typedef enum {
-	// Keywords
-	TOKEN_MODULE,
+    /* Keywords */
+    TOKEN_MODULE,
 	TOKEN_IMPORT,
 	TOKEN_SEMICOLON,
 
-	// Symbols
-	TOKEN_PARENT_OPEN,
+    /* Symbols */
+    TOKEN_PARENT_OPEN,
 	TOKEN_PARENT_CLOSE,
 	TOKEN_BRACKET_OPEN,
 	TOKEN_BRACKET_CLOSE,
 	TOKEN_COMMA,
 
-	// Primitives
-	TOKEN_VOID,
+    /* Primitives */
+    TOKEN_VOID,
 
-	// Variable
-	TOKEN_IDENTIFIER,
+    /* Variable */
+    TOKEN_IDENTIFIER,
 
-	// Others
-	TOKEN_EOF,
-	TOKEN_UNKNOWN,
+    /* Others */
+    TOKEN_EOF,
+    TOKEN_UNKNOWN
 } TokenType;
 
 /**
  * Holds additional information about a token.
  */
 typedef struct {
-	/// @brief The actual token.
-	TokenType token;
+    /* @brief The actual token. */
+    TokenType token;
 
-	/// @brief The textual representation of a token.
-	String text;
+    /* @brief The textual representation of a token. */
+    String text;
 
-	/// @brief The location of the token.
-	Location location;
+    /* @brief The location of the token. */
+    Location location;
 } Token;
 
 typedef struct TokenStream TokenStream;
@@ -71,4 +71,4 @@ void tokenstream_close(TokenStream* ts);
  */
 Token tokenstream_next(TokenStream* ts);
 
-#endif
+#endif