diff --git a/src/lexer/lex.l b/src/lexer/lex.l
index ddb33ae..edd1586 100644
--- a/src/lexer/lex.l
+++ b/src/lexer/lex.l
@@ -108,7 +108,7 @@ int yywrap(void * unused_param) {
 
 .   {
     GET_STATE
-    fprintf(stderr, "%s:%u:%u error: unexpected character '%s'\n", state->path, yylineno, COLUMN_NO+1, yytext);
+    fprintf(stderr, "%s:%zu:%zu error: unexpected character '%s'\n", state->path, state->current_line+1, COLUMN_NO+1, yytext);
     exit(1);
 }
 %%
\ No newline at end of file
diff --git a/src/lexer/lexer.c b/src/lexer/lexer.c
index fe59df6..e1603c6 100644
--- a/src/lexer/lexer.c
+++ b/src/lexer/lexer.c
@@ -13,11 +13,12 @@ void lexer(LexerState state) {
   int token;
   while ((token = yylex(scanner)) != 0) {
     Token *token_struct =
-        create_token(token, yyget_lineno(scanner), state.current_column + 1,
+        create_token(token, state.current_line+1, state.current_column + 1,
                      yyget_text(scanner));
     darray_push(state.tokens, token_struct);
     free(token_struct);
     if (token == TOKEN_NEW_LINE) {
+      state.current_line += 1;
       state.current_column = 0;
     } else {
       state.current_column += yyget_leng(scanner);
diff --git a/src/lexer/lexer.h b/src/lexer/lexer.h
index 8af7c77..0d7b51a 100644
--- a/src/lexer/lexer.h
+++ b/src/lexer/lexer.h
@@ -8,7 +8,8 @@
 typedef struct {
   const char *path;
   FILE *file;
-  int current_column;
+  size_t current_line;
+  size_t current_column;
   DArray *tokens;
   // add more fields as needed
 } LexerState;
diff --git a/src/lexer/token.h b/src/lexer/token.h
index 7892554..10c2288 100644
--- a/src/lexer/token.h
+++ b/src/lexer/token.h
@@ -1,6 +1,7 @@
 #ifndef TOKEN_H
 #define TOKEN_H
 
+#include <stddef.h>
 typedef enum {
   TOKEN_STRING = 256,
   TOKEN_NUMBER,
@@ -76,8 +77,8 @@ typedef enum {
 
 typedef struct {
   TokenType type;
-  int line;
-  int column;
+  size_t line;
+  size_t column;
   char *value;
 } Token;
 
diff --git a/src/main.c b/src/main.c
index 5156a7a..bb8c1dc 100644
--- a/src/main.c
+++ b/src/main.c
@@ -17,7 +17,7 @@ int main(int argc, char *argv[]) {
 
   darray_init(&tokens, sizeof(Token));
 
-  LexerState state = {path, fopen(path, "r"), 0, &tokens};
+  LexerState state = {path, fopen(path, "r"), 0, 0, &tokens};
   lexer(state);
   fclose(state.file);
 
diff --git a/src/parser/assignable/access/access.c b/src/parser/assignable/access/access.c
index cd2e54d..31e3818 100644
--- a/src/parser/assignable/access/access.c
+++ b/src/parser/assignable/access/access.c
@@ -12,7 +12,7 @@ ParsedValue *parse_access(char*file,DArray *tokens, size_t * index, ParsedValue
   ParsedValue *parsedValue = checked_malloc(sizeof(ParsedValue));
   ParsedAccess *parsedAccess = checked_malloc(sizeof(ParsedAccess));
   parsedAccess->to_access = to_access;
-  parsedAccess->access = strcpy(checked_malloc(sizeof(token->value)), token->value);
+  parsedAccess->access = strcpy(checked_malloc(strlen(token->value) + 1), token->value);
   parsedValue->type = AST_ACCESS;
   parsedValue->data = parsedAccess;
   return parsedValue;
diff --git a/src/parser/assignable/assign/assign.c b/src/parser/assignable/assign/assign.c
index e3879f8..8ffb520 100644
--- a/src/parser/assignable/assign/assign.c
+++ b/src/parser/assignable/assign/assign.c
@@ -1,28 +1,42 @@
 #include "assign.h"
 #include "../../../lexer/token.h"
+#include "../../../memory.h"
 #include "../../parser.h"
+#include "../call/call.h"
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include "../../../memory.h"
 
-ParsedValue *parse_assign(char *file, DArray *tokens,
-                          ParsedValue *assign_to, size_t *index) {
+ParsedValue *parse_assign(char *file, DArray *tokens, ParsedValue *assign_to,
+                          size_t *index) {
   Token *token = darray_get(tokens, *index);
   switch (assign_to->type) {
-    case AST_IDENTIFIER:
-    case AST_ASSIGN:
-      break;
-    default:
-      fprintf(stderr, "%s:%u:%u error: can't assign to %s\n", file, token->line,
-              token->column, ValueTypeNames[assign_to->type]);
-      exit(EXIT_FAILURE);
+  case AST_IDENTIFIER:
+  case AST_ASSIGN:
+    break;
+  case AST_CALL:;
+    ParsedCall *call = assign_to->data;
+    for (size_t i = 0; i < call->args->size; i++) {
+      if (((ParsedValue *)darray_get(call->args, i))->type != AST_IDENTIFIER) {
+        fprintf(
+            stderr,
+            "%s:%zu:%zu error: parameter names need to start with a letter or _, "
+            "only use letters, digits, or _, and can't be keywords.\n",
+            file, token->line, token->column);
+        exit(EXIT_FAILURE);
+      }
+    }
+    break;
+  default:
+    fprintf(stderr, "%s:%zu:%zu error: can't assign to %s\n", file, token->line,
+            token->column, ValueTypeNames[assign_to->type]);
+    exit(EXIT_FAILURE);
   }
   ParsedAssign *assign = checked_malloc(sizeof(ParsedAssign));
   assign->to = assign_to;
   assign->type = token->type;
   (*index)++;
-  error_if_finished(file,tokens,index);
+  error_if_finished(file, tokens, index);
   token = darray_get(tokens, *index);
   assign->from = parse_token(file, tokens, index, true);
   ParsedValue *parsedValue = checked_malloc(sizeof(ParsedValue));
diff --git a/src/parser/assignable/call/call.c b/src/parser/assignable/call/call.c
index 49ea61f..2de6570 100644
--- a/src/parser/assignable/call/call.c
+++ b/src/parser/assignable/call/call.c
@@ -8,42 +8,41 @@
 
 ParsedValue *parse_call(char *file, DArray *tokens, size_t *index,
                         ParsedValue *to_call) {
+  ParsedValue *parsedValue = checked_malloc(sizeof(ParsedValue));
+  ParsedCall *call = checked_malloc(sizeof(ParsedCall));
+  call->to_call = to_call;
+  parsedValue->data = call;
+  parsedValue->type = AST_CALL;
+  call->args = checked_malloc(sizeof(DArray));
+  darray_init(call->args, sizeof(ParsedValue));
   (*index)++;
   error_if_finished(file, tokens, index);
-  ParsedValue *parsedValue = checked_malloc(sizeof(ParsedValue));
-  ParsedCall *parsedCall = checked_malloc(sizeof(ParsedCall));
-  DArray *args = checked_malloc(sizeof(DArray));
-  darray_init(args, sizeof(ParsedValue));
-  parsedCall->to_call = to_call;
-  parsedCall->args = args;
-  parsedValue->type = AST_ACCESS;
-  parsedValue->data = parsedCall;
   Token *token = darray_get(tokens, *index);
-  DArray *arg = checked_malloc(sizeof(DArray));
-  darray_init(arg, sizeof(ParsedValue));
-  while (true) {
-    bool to_break = false;
-    switch (token->type) {
-    case TOKEN_RPAREN:
-      to_break = true;
-      break;
-    default:
-      break;
-    }
-    if (to_break)
-      break;
-    ParsedValue *parsedValue = parse_token(file, tokens, index, true);
-    darray_push(arg, parsedValue);
-    free(parsedValue);
-    switch (token->type) {
-    case TOKEN_COMMA:
-      darray_push(args, arg);
-      free(arg);
-      arg = checked_malloc(sizeof(DArray));
-      darray_init(arg, sizeof(ParsedValue));
-      break;
-    default:
-      break;
+  if (token->type == TOKEN_RPAREN) {
+    (*index)++;
+    if ((*index) >= tokens->size)
+      return parsedValue;
+    token = darray_get(tokens, *index);
+  } else {
+    while ((*index) < tokens->size) {
+      ParsedValue *parsedArg = parse_token(file, tokens, index, true);
+      darray_push(call->args, parsedArg);
+      free(parsedArg);
+      error_if_finished(file, tokens, index);
+      token = darray_get(tokens, *index);
+      if (token->type == TOKEN_RPAREN) {
+        (*index)++;
+        if ((*index) >= tokens->size)
+          break;
+        token = darray_get(tokens, *index);
+        break;
+      } else if (token->type != TOKEN_COMMA) {
+        fprintf(stderr, "%s:%zu:%zu error: expected comma\n", file, token->line,
+                token->column);
+        exit(EXIT_FAILURE);
+      }
+      (*index)++;
+      error_if_finished(file, tokens, index);
     }
   }
   return parsedValue;
@@ -53,9 +52,7 @@ void free_parse_call(void *ptr) {
   ParsedValue *parsedValue = ptr;
   ParsedCall *parsedCall = parsedValue->data;
 
+  darray_free(parsedCall->args, free_parsed);
   free_parsed(parsedCall->to_call);
-
-  
-
   free(parsedCall);
 }
\ No newline at end of file
diff --git a/src/parser/assignable/identifier/identifier.c b/src/parser/assignable/identifier/identifier.c
index 28e7864..88c4aec 100644
--- a/src/parser/assignable/identifier/identifier.c
+++ b/src/parser/assignable/identifier/identifier.c
@@ -7,6 +7,6 @@
 ParsedValue *parse_identifier(Token *token) {
   ParsedValue *parsedValue = checked_malloc(sizeof(ParsedValue));
   parsedValue->type = AST_IDENTIFIER;
-  parsedValue->data = strcpy(checked_malloc(sizeof(token->value)), token->value);
+  parsedValue->data = strcpy(checked_malloc(strlen(token->value) + 1), token->value);
   return parsedValue;
 }
\ No newline at end of file
diff --git a/src/parser/declaration/declaration.c b/src/parser/declaration/declaration.c
index 366234f..4296817 100644
--- a/src/parser/declaration/declaration.c
+++ b/src/parser/declaration/declaration.c
@@ -1,76 +1,125 @@
 #include "declaration.h"
 #include "../../lexer/token.h"
 #include "../../memory.h"
-#include "../parser.h"
 #include "../literals/literals.h"
+#include "../parser.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-ParsedValue *parse_declaration(char *file, DArray *tokens,
-                              size_t *index) {
+ParsedValue *parse_declaration(char *file, DArray *tokens, size_t *index) {
   (*index)++;
   error_if_finished(file, tokens, index);
   Token *token = darray_get(tokens, *index);
 
-  ParsedValue * parsedValue = malloc(sizeof(ParsedValue));
-  ParsedDeclaration * declaration = malloc(sizeof(ParsedDeclaration));
-  declaration->is_function = false;
-  declaration->from = parse_null();
-  parsedValue->data = declaration;
+  ParsedValue *parsedValue = malloc(sizeof(ParsedValue));
   parsedValue->type = AST_DECLARATION;
+  DArray *declarations = malloc(sizeof(DArray));
+  darray_init(declarations, sizeof(ParsedSingleDeclaration));
+  parsedValue->data = declarations;
+  while (true) {
+    ParsedSingleDeclaration _declaration = {};
+    darray_push(declarations, &_declaration);
+    ParsedSingleDeclaration *declaration =
+        darray_get(declarations, declarations->size - 1);
+    declaration->is_function = false;
+    declaration->from = parse_null();
 
-  if (token->type != TOKEN_IDENTIFIER) {
-    fprintf(stderr, "%s:%u:%u error: declaration requires an identifier\n",
-            file, token->line, token->column);
-    exit(EXIT_FAILURE);
-  }
-  declaration->name = strcpy(checked_malloc(sizeof(token->value)), token->value);
+    if (token->type != TOKEN_IDENTIFIER) {
+      fprintf(stderr, "%s:%zu:%zu error: declaration requires an identifier\n",
+              file, token->line, token->column);
+      exit(EXIT_FAILURE);
+    }
+    declaration->name =
+        strcpy(checked_malloc(strlen(token->value) + 1), token->value);
 
-  (*index)++;
-  if ((*index) >= tokens->size) {
-    return parsedValue;
-  }
-  token = darray_get(tokens, *index);
-  if (token->type == TOKEN_LPAREN) {
-    declaration->is_function = true;
-    declaration->parameters = checked_malloc(sizeof(DArray));
-    darray_init(declaration->parameters, sizeof(char*));
     (*index)++;
-    error_if_finished(file, tokens, index);
-    while(true) {
-      token = darray_get(tokens, *index);
-      if (token->type != TOKEN_IDENTIFIER) {
-        fprintf(stderr, "%s:%u:%u error: parameter names need to start with a letter or _, only use letters, digits, or _, and can't be keywords.\n",
-            file, token->line, token->column);
-        exit(EXIT_FAILURE);
-      }
-      darray_push(declaration->parameters, strcpy(checked_malloc(sizeof(token->value)), token->value));
+    if ((*index) >= tokens->size)
+      return parsedValue;
+    token = darray_get(tokens, *index);
+    if (token->type == TOKEN_LPAREN) {
+      declaration->is_function = true;
+      declaration->parameters = checked_malloc(sizeof(DArray));
+      darray_init(declaration->parameters, sizeof(char *));
       (*index)++;
       error_if_finished(file, tokens, index);
       token = darray_get(tokens, *index);
       if (token->type == TOKEN_RPAREN) {
         (*index)++;
-        error_if_finished(file, tokens, index);
+        if ((*index) >= tokens->size)
+          return parsedValue;
         token = darray_get(tokens, *index);
-        break;
-      } else if (token->type != TOKEN_COMMA) {
-        fprintf(stderr, "%s:%u:%u error: expected comma\n",
-            file, token->line, token->column);
-        exit(EXIT_FAILURE);
+      } else {
+        while ((*index) < tokens->size) {
+          token = darray_get(tokens, *index);
+          if (token->type != TOKEN_IDENTIFIER) {
+            fprintf(stderr,
+                    "%s:%zu:%zu error: parameter names need to start with a "
+                    "letter or _, only use letters, digits, or _, and can't be "
+                    "keywords.\n",
+                    file, token->line, token->column);
+            exit(EXIT_FAILURE);
+          }
+          char *parameter_name =
+              strcpy(checked_malloc(strlen(token->value) + 1), token->value);
+          darray_push(declaration->parameters, &parameter_name);
+          (*index)++;
+          error_if_finished(file, tokens, index);
+          token = darray_get(tokens, *index);
+          if (token->type == TOKEN_RPAREN) {
+            (*index)++;
+            if ((*index) >= tokens->size)
+              return parsedValue;
+            token = darray_get(tokens, *index);
+            break;
+          } else if (token->type != TOKEN_COMMA) {
+            fprintf(stderr, "%s:%zu:%zu error: expected comma\n", file,
+                    token->line, token->column);
+            exit(EXIT_FAILURE);
+          }
+          (*index)++;
+          error_if_finished(file, tokens, index);
+        }
       }
+    }
+    if (token->type == TOKEN_ASSIGN) {
       (*index)++;
       error_if_finished(file, tokens, index);
+
+      free(declaration->from);
+
+      declaration->from = parse_token(file, tokens, index, true);
+      if ((*index) >= tokens->size)
+        break;
+      token = darray_get(tokens, *index);
     }
+    if (token->type != TOKEN_COMMA)
+      break;
+    (*index)++;
+    error_if_finished(file, tokens, index);
+    token = darray_get(tokens, *index);
   }
-  if (token->type != TOKEN_ASSIGN) return parsedValue;
-
-  (*index)++;
-  error_if_finished(file, tokens, index);
-  
-  free(declaration->from);
-
-  declaration->from = parse_token(file, tokens, index, true);
-
   return parsedValue;
+}
+
+void free_string(void *ptr) {
+  // `ptr` is a pointer to a char*
+  char *str = *(char **)ptr;
+  free(str);
+}
+
+void free_single_declaration(void *ptr) {
+  ParsedSingleDeclaration *declaration = ptr;
+  free(declaration->name);
+  if (declaration->is_function)
+    darray_free(declaration->parameters, free_string);
+  free_parsed(declaration->from);
+  free(declaration->from);
+}
+
+void free_declaration(void *ptr) {
+  ParsedValue *parsedValue = ptr;
+  DArray *declaration = parsedValue->data;
+  darray_free(declaration, free_single_declaration);
+  free(declaration);
 }
\ No newline at end of file
diff --git a/src/parser/declaration/declaration.h b/src/parser/declaration/declaration.h
index 571da4d..358add9 100644
--- a/src/parser/declaration/declaration.h
+++ b/src/parser/declaration/declaration.h
@@ -8,10 +8,12 @@ typedef struct {
   bool is_function;
   DArray * parameters; // string[]
   ParsedValue * from;
-} ParsedDeclaration;
+} ParsedSingleDeclaration;
 
 // Function declaration for parsing an identifier
 ParsedValue *parse_declaration(char *file, DArray *tokens,
                               size_t *index);
 
+void free_declaration(void *ptr);
+
 #endif // DECLARATION_H
\ No newline at end of file
diff --git a/src/parser/if/if.c b/src/parser/if/if.c
index 9bdca56..9bbf038 100644
--- a/src/parser/if/if.c
+++ b/src/parser/if/if.c
@@ -42,7 +42,7 @@ ParsedValue *parse_if(char *file, DArray *tokens,
       token = darray_get(tokens, *index);
       if (token->type != TOKEN_LPAREN) {
         fprintf(stderr,
-                "%s:%u:%u error: expected '(' after if\n",
+                "%s:%zu:%zu error: expected '(' after if\n",
                 file, token->line, token->column);
         exit(EXIT_FAILURE);
       }
@@ -67,7 +67,7 @@ ParsedValue *parse_if(char *file, DArray *tokens,
 
       if (token->type != TOKEN_RPAREN) {
         fprintf(stderr,
-                "%s:%u:%u error: missing closing ')' in condition\n",
+                "%s:%zu:%zu error: missing closing ')' in condition\n",
                 file, token->line, token->column);
         exit(EXIT_FAILURE);
       }
@@ -82,7 +82,7 @@ ParsedValue *parse_if(char *file, DArray *tokens,
 
     if (!parsed_content) {
       fprintf(stderr,
-              "%s:%u:%u error: expected body after condition\n",
+              "%s:%zu:%zu error: expected body after condition\n",
               file, token->line, token->column);
       exit(EXIT_FAILURE);
     }
diff --git a/src/parser/parser.c b/src/parser/parser.c
index cc53d4d..1d21f44 100644
--- a/src/parser/parser.c
+++ b/src/parser/parser.c
@@ -8,6 +8,7 @@
 #include "number/number.h"
 #include "string/string.h"
 #include "literals/literals.h"
+#include "assignable/call/call.h"
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdio.h>
@@ -21,7 +22,7 @@ const char *ValueTypeNames[] = {"string", "assign",       "identifier",
 void error_if_finished(char *file, DArray *tokens, size_t *index) {
   if ((*index) >= tokens->size) {
     Token *token = darray_get(tokens, tokens->size - 1);
-    fprintf(stderr, "%s:%u:%u error: syntax error\n", file, token->line,
+    fprintf(stderr, "%s:%zu:%zu error: syntax error\n", file, token->line,
             token->column);
     exit(EXIT_FAILURE);
   }
@@ -67,7 +68,7 @@ ParsedValue *parse_token(char *file, DArray *tokens, size_t *index,
     output = parse_token(file, tokens, index, inline_flag);
     break;
   case TOKEN_INDENT:
-    fprintf(stderr, "%s:%u:%u error: invalid indentation\n", file, token->line,
+    fprintf(stderr, "%s:%zu:%zu error: invalid indentation\n", file, token->line,
             token->column);
     exit(EXIT_FAILURE);
   case TOKEN_IDENTIFIER:
@@ -82,7 +83,7 @@ ParsedValue *parse_token(char *file, DArray *tokens, size_t *index,
     output = parse_declaration(file, tokens, index);
     break;
   default:
-    fprintf(stderr, "%s:%u:%u error: syntax error\n", file, token->line,
+    fprintf(stderr, "%s:%zu:%zu error: syntax error\n", file, token->line,
             token->column);
     exit(EXIT_FAILURE);
   }
@@ -102,6 +103,9 @@ ParsedValue *parse_token(char *file, DArray *tokens, size_t *index,
     case TOKEN_ASSIGN_STAR:;
       output = parse_assign(file, tokens, output, index);
       break;
+    case TOKEN_LPAREN:
+      output = parse_call(file, tokens, index, output);
+      break;
     default:
       passed = true;
     }
@@ -131,6 +135,12 @@ void free_parsed(void *ptr) {
   case AST_ASSIGN:
     free_parse_assign(parsed);
     break;
+  case AST_DECLARATION:
+    free_declaration(parsed);
+    break;
+  case AST_CALL:
+    free_parse_call(parsed);
+    break;
   case AST_NUMBER:
   case AST_NULL:
   case AST_BOOLEAN:
diff --git a/test.ar b/test.ar
index 1813ee1..1ec6e30 100644
--- a/test.ar
+++ b/test.ar
@@ -1,2 +1,2 @@
-let a
-a = 10
\ No newline at end of file
+let a, b = 1, c, d = 42, temp_result, compute_area(radius) = 3.1415, identity(x) = x, f(x), g(y, z), result, z = 0, extremely_long_variable_name_to_test_limits, cache_value = compute_area(5), placeholder_fn_with_no_body(arg1, arg2, arg3), total = identity(100), deeply_nested_args_function(arg1, arg2, arg3, arg4, arg5), sum = a, another, another_function(), just_null_here,
+x = 10
\ No newline at end of file