rcx

commit 2c036d36487e5d9b49e4560a4d1ea0c43f787431
parent 2d7c0bf2ccc361d6072b7038db4fee5f06eac6ad
Author: Robert Russell <robertrussell.72001@gmail.com>
Date:   Wed,  7 Sep 2022 20:18:25 -0700

Add peek method to vectors

If we have push and pop, we ought to have peek as well, so that
vectors can be used as stacks easily.

Diffstat:
M
inc/rcx/vector.h
 | 
6
+++++-

1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/inc/rcx/vector.h b/inc/rcx/vector.h
@@ -33,7 +33,8 @@ R_VECTOR_STATIC UNUSED int R_VECTOR_METHOD(reserve,##__VA_ARGS__)(T **v, usize n
 R_VECTOR_STATIC UNUSED int R_VECTOR_METHOD(ins,##__VA_ARGS__)(T **v, usize i, T e); \
 R_VECTOR_STATIC UNUSED int R_VECTOR_METHOD(push,##__VA_ARGS__)(T **v, T e); \
 R_VECTOR_STATIC UNUSED T R_VECTOR_METHOD(del,##__VA_ARGS__)(T **v, usize i); \
-R_VECTOR_STATIC UNUSED T R_VECTOR_METHOD(pop,##__VA_ARGS__)(T **v);
+R_VECTOR_STATIC UNUSED T R_VECTOR_METHOD(pop,##__VA_ARGS__)(T **v); \
+R_VECTOR_STATIC UNUSED T R_VECTOR_METHOD(peek,##__VA_ARGS__)(T **v);
 
 #define R_VECTOR_DEFINE(T, ...)\
 void R_VECTOR_METHOD(free,##__VA_ARGS__)(T **v) { \
@@ -105,6 +106,9 @@ T R_VECTOR_METHOD(del,##__VA_ARGS__)(T **v, usize i) { \
 } \
 T R_VECTOR_METHOD(pop,##__VA_ARGS__)(T **v) { \
 	return R_VECTOR_METHOD(del,##__VA_ARGS__)(v, R_VECTOR_HDR_(*v)->len - 1); \
+} \
+T R_VECTOR_METHOD(peek,##__VA_ARGS__)(T **v) { \
+	return (*v)[R_VECTOR_HDR_(*v)->len - 1]; \
 }
 
 /* TODO?