diff --git a/libs/lex_parser/src/lex_parser.c b/libs/lex_parser/src/lex_parser.c
index fb55280..3557ad9 100644
--- a/libs/lex_parser/src/lex_parser.c
+++ b/libs/lex_parser/src/lex_parser.c
@@ -293,7 +293,7 @@ cbool lex_parse_string(core_probe_stream_t *input, core_pos_t *pos,
             if (val == -1) {
                 LOG_ERROR("Invalid escape character it is \\%c [%d]", ch, ch);
             } else {
-                cstring_push(&str, val);
+                cstring_append_ch(&str, val);
                 continue;
             }
         } else if (ch == '"') {
@@ -304,7 +304,7 @@ cbool lex_parse_string(core_probe_stream_t *input, core_pos_t *pos,
 
         core_probe_stream_consume(stream);
         core_pos_next(pos);
-        cstring_push(&str, ch);
+        cstring_append_ch(&str, ch);
     }
 
     *output = str;
@@ -419,7 +419,7 @@ cbool lex_parse_identifier(core_probe_stream_t *input, core_pos_t *pos,
     } else if (ch == '_' || (ch >= 'a' && ch <= 'z') ||
                (ch >= 'A' && ch <= 'Z')) {
         while (1) {
-            cstring_push(output, ch);
+            cstring_append_ch(output, ch);
             core_probe_stream_consume(stream);
             core_pos_next(pos);
             ch = core_probe_stream_peek(stream);
diff --git a/libs/lexer/tests/test_run.c b/libs/lexer/tests/test_run.c
index a2c38d8..abcb15e 100644
--- a/libs/lexer/tests/test_run.c
+++ b/libs/lexer/tests/test_run.c
@@ -68,7 +68,7 @@ int main(int argc, char *argv[]) {
         core_mem_probe_stream_init(&mem_stream, buffer, fsize, false);
     Assert(stream != null);
     cstring_clear(&stream->name);
-    cstring_push_cstr(&stream->name, file_name, strlen(file_name));
+    cstring_append_cstr(&stream->name, file_name, strlen(file_name));
     lexer_init(&lexer, stream);
     lexer_tok_t tok;
 
diff --git a/runtime/libcore/include/core_str.h b/runtime/libcore/include/core_str.h
index 29f8eb3..e34045f 100644
--- a/runtime/libcore/include/core_str.h
+++ b/runtime/libcore/include/core_str.h
@@ -72,13 +72,14 @@ static inline void cstring_free(cstring_t *str) {
  * @param data 要追加的 C 字符串指针
  * @param len 要追加的 C 字符串长度
  */
-static inline void cstring_push_cstr(cstring_t *str, const char *data,
-                                     usize len) {
+static inline void cstring_append_cstr(cstring_t *str, const char *data,
+                                       usize len) {
     if (str == null || data == null || len == 0) {
         return;
     }
 
     if (str->cap == 0) {
+        // add '\0' to str
         str->size = 1;
     }
 
@@ -86,12 +87,13 @@ static inline void cstring_push_cstr(cstring_t *str, const char *data,
     if (str->size + len > str->cap) {
         usize new_cap = str->cap;
         while (new_cap < str->size + len) {
-            new_cap *= 2;
-            // FIXME write by AI 处理溢出情况
             if (new_cap == 0) {
                 new_cap = str->size + len;
                 break;
+            } else {
+                new_cap *= 2;
             }
+            // FIXME 处理溢出情况
         }
 
         char *new_data = (char *)smcc_realloc(str->data, new_cap);
@@ -106,14 +108,24 @@ static inline void cstring_push_cstr(cstring_t *str, const char *data,
     str->data[str->size - 1] = '\0'; // 保证 C 字符串兼容性
 }
 
+/**
+ * @brief 向动态字符串末尾追加另一个动态字符串
+ *
+ * @param str 目标动态字符串指针
+ * @param other 要追加的动态字符串指针
+ */
+static inline void cstring_append(cstring_t *str, const cstring_t *other) {
+    cstring_append_cstr(str, other->data, other->size - 1);
+}
+
 /**
  * @brief 向动态字符串末尾追加一个字符
  *
  * @param str 目标动态字符串指针
  * @param ch 要追加的字符
  */
-static inline void cstring_push(cstring_t *str, char ch) {
-    cstring_push_cstr(str, &ch, 1);
+static inline void cstring_append_ch(cstring_t *str, char ch) {
+    cstring_append_cstr(str, &ch, 1);
 }
 
 /**
diff --git a/runtime/libcore/include/core_stream.h b/runtime/libcore/include/core_stream.h
index be74ad6..373620d 100644
--- a/runtime/libcore/include/core_stream.h
+++ b/runtime/libcore/include/core_stream.h
@@ -46,7 +46,7 @@ struct core_probe_stream {
     cbool (*is_at_end)(core_probe_stream_t *stream);
 
     /// @brief 销毁流并释放资源
-    void (*destroy)(core_probe_stream_t *stream);
+    void (*drop)(core_probe_stream_t *stream);
 };
 
 static inline int core_probe_stream_consume(core_probe_stream_t *self) {
@@ -86,8 +86,8 @@ static inline cbool core_probe_stream_has_more(core_probe_stream_t *self) {
     return !self->is_at_end(self);
 }
 
-static inline void core_probe_stream_destroy(core_probe_stream_t *self) {
-    self->destroy(self);
+static inline void core_probe_stream_drop(core_probe_stream_t *self) {
+    self->drop(self);
 }
 
 #ifndef __SMCC_CORE_NO_MEM_PROBE_STREAM__
diff --git a/runtime/libcore/src/stream.c b/runtime/libcore/src/stream.c
index 70c9a66..dcdf312 100644
--- a/runtime/libcore/src/stream.c
+++ b/runtime/libcore/src/stream.c
@@ -68,8 +68,8 @@ static cbool mem_probe_stream_back(core_probe_stream_t *_stream) {
     return true;
 }
 
-static usize mem_probe_stream_read_buf(core_probe_stream_t *_stream, char *buffer,
-                                   usize count) {
+static usize mem_probe_stream_read_buf(core_probe_stream_t *_stream,
+                                       char *buffer, usize count) {
     Assert(_stream != null);
     core_mem_probe_stream_t *stream = (core_mem_probe_stream_t *)_stream;
 
@@ -164,7 +164,7 @@ core_probe_stream_t *core_mem_probe_stream_init(core_mem_probe_stream_t *stream,
     stream->stream.read_buf = mem_probe_stream_read_buf;
     stream->stream.reset = mem_probe_stream_reset;
     stream->stream.is_at_end = mem_probe_stream_is_at_end;
-    stream->stream.destroy = mem_probe_stream_destroy;
+    stream->stream.drop = mem_probe_stream_destroy;
 
     return (core_probe_stream_t *)stream;
 }