X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Flexer%2Flexer.h;h=91200ce6cd86488f7aa92e2fe4e5d22865e5c2bb;hb=9420449c40bb1307f6c31e50b61ba03825680e3a;hp=463747f97454659825b860e9fef79477fe5184c5;hpb=e0f9210e814d03bc43b6a9b30a402e403d5666b9;p=pspp

diff --git a/src/language/lexer/lexer.h b/src/language/lexer/lexer.h
index 463747f974..91200ce6cd 100644
--- a/src/language/lexer/lexer.h
+++ b/src/language/lexer/lexer.h
@@ -23,6 +23,7 @@
 
 #include "data/identifier.h"
 #include "data/variable.h"
+#include "libpspp/cast.h"
 #include "libpspp/compiler.h"
 #include "libpspp/prompt.h"
 
@@ -104,18 +105,18 @@ void lex_append (struct lexer *, struct lex_reader *);
 void lex_get (struct lexer *);
 
 /* Token testing functions. */
-bool lex_is_number (struct lexer *);
-double lex_number (struct lexer *);
-bool lex_is_integer (struct lexer *);
-long lex_integer (struct lexer *);
-bool lex_is_string (struct lexer *);
+bool lex_is_number (const struct lexer *);
+double lex_number (const struct lexer *);
+bool lex_is_integer (const struct lexer *);
+long lex_integer (const struct lexer *);
+bool lex_is_string (const struct lexer *);
 
 /* Token testing functions with lookahead. */
-bool lex_next_is_number (struct lexer *, int n);
-double lex_next_number (struct lexer *, int n);
-bool lex_next_is_integer (struct lexer *, int n);
-long lex_next_integer (struct lexer *, int n);
-bool lex_next_is_string (struct lexer *, int n);
+bool lex_next_is_number (const struct lexer *, int n);
+double lex_next_number (const struct lexer *, int n);
+bool lex_next_is_integer (const struct lexer *, int n);
+long lex_next_integer (const struct lexer *, int n);
+bool lex_next_is_string (const struct lexer *, int n);
 
 /* Token matching functions. */
 bool lex_match (struct lexer *, enum token_type);
@@ -161,6 +162,8 @@ void lex_next_error (struct lexer *, int n0, int n1, const char *, ...)
 int lex_end_of_command (struct lexer *);
 
 void lex_error_expecting (struct lexer *, const char *, ...) SENTINEL(0);
+#define lex_error_expecting(...) \
+  lex_error_expecting(__VA_ARGS__, NULL_SENTINEL)
 
 void lex_sbc_only_once (const char *);
 void lex_sbc_missing (const char *);