Implement #if, #else, #elif, and #endif with tests.

So far the only expression implemented is a single integer literal,
but obviously that's easy to extend. Various things including nesting
are tested here.

1 files changed, 12 insertions, 0 deletions

diff --git a/glcpp.h b/glcpp.h
index 1537109ada..33ece8f92b 100644
--- a/glcpp.h
+++ b/glcpp.h
@@ -95,12 +95,24 @@ typedef struct expansion_node {
 	struct expansion_node *next;
 } expansion_node_t;
 
+typedef enum skip_type {
+	SKIP_NO_SKIP,
+	SKIP_TO_ELSE,
+	SKIP_TO_ENDIF
+} skip_type_t;
+
+typedef struct skip_node {
+	skip_type_t type;
+	struct skip_node *next;
+} skip_node_t;
+
 struct glcpp_parser {
 	yyscan_t scanner;
 	struct hash_table *defines;
 	expansion_node_t *expansions;
 	int just_printed_separator;
 	int need_newline;
+	skip_node_t *skip_stack;
 };
 
 void