diff --git a/examples/hello.c b/examples/hello.c
index 94d8622..58cc41f 100644
--- a/examples/hello.c
+++ b/examples/hello.c
@@ -1,8 +1,10 @@
 int puts(const char* __s);
 
-#define PUTS(A, B) puts(A, B)
+#define A puts
+#define B(V, W) A(V)
+#define C B("hello world", 123)
 
 int main()
 {
-    PUTS("hello", "world");
+    C;
 }
diff --git a/main.c b/main.c
index 28e431f..f147076 100644
--- a/main.c
+++ b/main.c
@@ -57,7 +57,7 @@ int main(int argc, char* argv[])
         return EXIT_FAILURE;
     }
 
-    printf("text:\n%s\n", text);
+    printf("--- text ---\n%s\n", text);
 
     SourceIter source_chars;
     source_iter_init(&source_chars, text);
@@ -74,12 +74,25 @@ int main(int argc, char* argv[])
     Preproc preproc;
     preproc_init(&preproc, &lexer);
 
-    printf("tokens:\n");
+    printf("--- tokens ---\n");
 
+    int line = 1;
+    int col = 1;
     Tok tok;
-    while ((tok = preproc_next_with_newline(&preproc)).ty != Tok_Eof) {
+    while ((tok = preproc_next(&preproc)).ty != Tok_Eof) {
         // printf("%s\t%s\n", tokty_str(tok.ty), tok.text);
-        printf("%s ", tok.text);
+        while (line < tok.line) {
+            printf("\n");
+            line += 1;
+            col = 1;
+        }
+        while (col < tok.col) {
+            printf(" ");
+            col += 1;
+        }
+        printf("%s", tok.text);
+        line = tok.line;
+        col = tok.col + strlen(tok.text);
     }
     fputs("\n", stdout);
 
diff --git a/parse.h b/parse.h
index 1e43a60..d7f94f7 100644
--- a/parse.h
+++ b/parse.h
@@ -81,19 +81,27 @@ Tok lexer_next(Lexer* l);
 typedef struct MacroDef MacroDef;
 typedef struct MacroInv MacroInv;
 
+typedef struct {
+    MacroDef* data;
+    size_t cap;
+    size_t size;
+} MacroDefs;
+
+typedef struct {
+    MacroInv* data;
+    size_t cap;
+    size_t size;
+} MacroInvs;
+
 typedef struct {
     Lexer* lexer;
     Tok curr;
 
-    MacroDef* defs;
-    size_t defs_cap;
-    size_t defs_size;
+    MacroDefs defs;
     Hashmap def_map;
 
     Arena arg_arena;
-    MacroInv* macro_invs;
-    size_t macro_invs_cap;
-    size_t macro_invs_size;
+    MacroInvs macro_invs;
 } Preproc;
 
 void preproc_init(Preproc* p, Lexer* lexer);
diff --git a/preproc.c b/preproc.c
index a269604..1835a86 100644
--- a/preproc.c
+++ b/preproc.c
@@ -34,15 +34,11 @@ void preproc_init(Preproc* p, Lexer* lexer)
         .lexer = lexer,
         .curr = curr,
 
-        .defs = nullptr,
-        .defs_cap = 0,
-        .defs_size = 0,
+        .defs = { },
         .def_map = { },
 
         .arg_arena = { },
-        .macro_invs = nullptr,
-        .macro_invs_cap = 0,
-        .macro_invs_size = 0,
+        .macro_invs = { },
     };
 
     hashmap_init(&p->def_map);
@@ -51,14 +47,14 @@ void preproc_init(Preproc* p, Lexer* lexer)
 
 void preproc_deinit(Preproc* p)
 {
-    if (p->defs) {
-        for (size_t i = 0; i < p->defs_size; ++i) {
-            free(p->defs[i].toks);
-            if (p->defs[i].params) {
-                free(p->defs[i].params);
+    if (p->defs.data) {
+        for (size_t i = 0; i < p->defs.size; ++i) {
+            free(p->defs.data[i].toks);
+            if (p->defs.data[i].params) {
+                free(p->defs.data[i].params);
             }
         }
-        free(p->defs);
+        free(p->defs.data);
     }
     hashmap_deinit(&p->def_map);
     arena_deinit(&p->arg_arena);
@@ -142,9 +138,9 @@ static Tok p_define(Preproc* p)
     }
 
     array_push(
-        (void**)&p->defs, &p->defs_cap, &p->defs_size, &def, sizeof(def));
+        (void**)&p->defs, &p->defs.cap, &p->defs.size, &def, sizeof(def));
 
-    MacroDef* deftoks = &p->defs[p->defs_size - 1];
+    MacroDef* deftoks = &p->defs.data[p->defs.size - 1];
     hashmap_set(&p->def_map, ident_tok.text, deftoks);
 
     return p->curr;
@@ -189,10 +185,10 @@ static Tok p_include(Preproc* p)
 
 static Tok p_paste_macro_body(Preproc* p)
 {
-    MacroInv* inv = &p->macro_invs[p->macro_invs_size - 1];
+    MacroInv* inv = &p->macro_invs.data[p->macro_invs.size - 1];
 
     if (inv->tok_idx >= inv->def->toks_size) {
-        p->macro_invs_size -= 1;
+        p->macro_invs.size -= 1;
         return preproc_next_with_newline(p);
     }
 
@@ -225,7 +221,7 @@ static Tok p_detect_macro(Preproc* p, Tok head)
     hashmap_init(&inv.arg_map);
 
     array_push(
-        (void**)&p->macro_invs, &p->defs_cap, &p->defs_size, &inv, sizeof(inv));
+        (void**)&p->macro_invs, &p->defs.cap, &p->defs.size, &inv, sizeof(inv));
 
     if (!def->params)
         return preproc_next_with_newline(p);
@@ -322,7 +318,7 @@ static Tok replace_candidate_tok(Preproc* p, Tok tok, size_t inv_idx)
 {
     if (inv_idx == 0)
         return tok;
-    MacroInv* inv = &p->macro_invs[inv_idx];
+    MacroInv* inv = &p->macro_invs.data[inv_idx];
     if (tok.ty != Tok_Ident)
         return tok;
     MacroArg* arg = hashmap_get(&inv->arg_map, tok.text);
@@ -332,13 +328,13 @@ static Tok replace_candidate_tok(Preproc* p, Tok tok, size_t inv_idx)
 
 static Tok expand_tok(Preproc* p, Tok tok)
 {
-    if (p->macro_invs_size == 0)
+    if (p->macro_invs.size == 0)
         return tok;
 
-    MacroInv* inv = &p->macro_invs[p->macro_invs_size - 1];
+    MacroInv* inv = &p->macro_invs.data[p->macro_invs.size - 1];
 
     if (inv->tok_idx >= inv->def->toks_size) {
-        p->macro_invs_size -= 1;
+        p->macro_invs.size -= 1;
         return expand_tok(p, tok);
     }
 }