commit 04464ec2e7e0c482cd22350551663ec89a1c9e73
Author: Arthur Barraux <arthur.barraux@etu.uca.fr>
Date:   Mon Jun 2 10:27:04 2025 +0200

    first commit

diff --git a/include/config_tools.h b/include/config_tools.h
new file mode 100644
index 0000000..be87dba
--- /dev/null
+++ b/include/config_tools.h
@@ -0,0 +1,34 @@
+#ifndef CONFIG_TOOLS_H_
+#define CONFIG_TOOLS_H_
+
+#include "data.h"
+#include "parser.h"
+#include <stdio.h>
+
+config_t *config_create(void);
+void free_node(node_t *node);
+void config_destroy(config_t *config);
+int handle_map_key(config_t *config, node_t **args, int arg_count);
+int handle_define(config_t *config, node_t **args, int arg_count);
+int execute_function_call(config_t *config, node_t *call);
+int config_parse_string(config_t *config, const char *input);
+int config_parse_file(config_t *config, const char *filename);
+
+const char *config_get_key_mapping(config_t *config, const char *key_combo);
+node_t *find_variable(config_t *config, const char *name);
+
+const char *config_get_string(config_t *config, const char *path,
+                              const char *default_value);
+int config_get_int(config_t *config, const char *path, int default_value);
+double config_get_double(config_t *config, const char *path,
+                         double default_value);
+bool config_get_bool(config_t *config, const char *path, bool default_value);
+void config_print_all(config_t *config);
+
+static struct {
+  const char *name;
+  int (*handler)(config_t *config, node_t **args, int arg_count);
+} builtin_functions[] = {
+    {"map-key", handle_map_key}, {"define", handle_define}, {NULL, NULL}};
+
+#endif
diff --git a/include/data.h b/include/data.h
new file mode 100644
index 0000000..fccb8c4
--- /dev/null
+++ b/include/data.h
@@ -0,0 +1,100 @@
+#ifndef DATA_H_PARSER
+#define DATA_H_PARSER
+
+#include "define.h"
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Token types for lexical analysis
+
+typedef enum {
+  TOKEN_COMMA,   // ,
+  TOKEN_PERCENT, // %
+  TOKEN_LPAREN,  // (
+  TOKEN_RPAREN,  // )
+  TOKEN_SYMBOL,  // identifiers/function names
+  TOKEN_STRING,  // "quoted strings"
+  TOKEN_NUMBER,  // integers and floats
+  TOKEN_BOOLEAN, // true false
+  TOKEN_NEWLINE, // \n (statement separator)
+  TOKEN_EOF,
+  TOKEN_ERROR
+} token_type_t;
+
+typedef struct {
+  token_type_t type;
+  char value[MAX_TOKEN_LENGTH];
+  int line;
+  int column;
+} token_t;
+
+// AST node types
+typedef enum {
+  NODE_SYMBOL,
+  NODE_STRING,
+  NODE_NUMBER,
+  NODE_BOOLEAN,
+  NODE_FUNCTION_REF, // %function-name
+  NODE_FUNCTION_CALL // ,function-name()
+} node_type_t;
+
+typedef struct node {
+  node_type_t type;
+  union {
+    char symbol[MAX_SYMBOL_LENGTH];
+    char string[MAX_STRING_LENGTH];
+    double number;
+    bool boolean;
+    char function_ref[MAX_SYMBOL_LENGTH];
+    struct {
+      char function_name[MAX_SYMBOL_LENGTH];
+      struct node *args[MAX_ARGS];
+      int arg_count;
+    } call;
+  } data;
+} node_t;
+
+// Lexer state
+typedef struct {
+  const char *input;
+  int pos;
+  int line;
+  int column;
+  char current_char;
+} lexer_t;
+
+// Configuration storage
+typedef struct key_mapping {
+  char *key_combo;
+  char *function_name;
+  struct key_mapping *next;
+} key_mapping_t;
+
+typedef struct config_var {
+  char *name;
+  node_t *value;
+  struct config_var *next;
+} config_var_t;
+
+typedef struct {
+  key_mapping_t *key_mappings;
+  config_var_t *variables;
+} config_t;
+
+void advance_char(lexer_t *lexer);
+void skip_whitespace(lexer_t *lexer);
+void skip_comment(lexer_t *lexer);
+node_t *create_node(node_type_t type);
+node_t *create_symbol_node(const char *symbol);
+node_t *create_string_node(const char *string);
+node_t *create_number_node(double number);
+node_t *create_boolean_node(bool value);
+node_t *create_function_ref_node(const char *function_name);
+node_t *create_function_call_node(const char *function_name);
+
+void add_arg_to_call(node_t *call, node_t *args);
+
+#endif
diff --git a/include/define.h b/include/define.h
new file mode 100644
index 0000000..1aa64fa
--- /dev/null
+++ b/include/define.h
@@ -0,0 +1,9 @@
+#ifndef BLISP_DEFINE_H_
+#define BLISP_DEFINE_H_
+
+#define MAX_TOKEN_LENGTH 256
+#define MAX_SYMBOL_LENGTH 128
+#define MAX_STRING_LENGTH 512
+#define MAX_ARGS 16
+
+#endif
diff --git a/include/lexer.h b/include/lexer.h
new file mode 100644
index 0000000..081a23b
--- /dev/null
+++ b/include/lexer.h
@@ -0,0 +1,8 @@
+#ifndef LEXER_H_
+#define LEXER_H_
+
+#include "data.h"
+
+token_t next_token(lexer_t *lexer);
+
+#endif
diff --git a/include/parser.h b/include/parser.h
new file mode 100644
index 0000000..6029a10
--- /dev/null
+++ b/include/parser.h
@@ -0,0 +1,11 @@
+#ifndef PARSER_H_
+#define PARSER_H_
+
+#include "data.h"
+#include "lexer.h"
+
+node_t *parse_atom(lexer_t *lexer, token_t *token);
+node_t *parse_function_call(lexer_t *lexer, const char *function_name);
+node_t *parse_statement(lexer_t *lexer);
+
+#endif
diff --git a/init.bl b/init.bl
new file mode 100644
index 0000000..741a275
--- /dev/null
+++ b/init.bl
@@ -0,0 +1,12 @@
+// Configuration file
+
+,map-key("CTRL-s" %editorSave)
+// ,map-key("CTRL-q" %editorQuit)
+,map-key("CTRL-a" %move-cursor-beg-line)
+,map-key("CTRL-z" %move-cursor-end-line)
+,map-key("CTRL-f o" %open-file)
+,map-key("CTRL-w s h" %window-split-horizontal)
+,map-key("CTRL-w s v" %window-split-vertical)
+
+,define(theme "dark")
+,define(auto-save true)
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..acf8bdd
--- /dev/null
+++ b/main.c
@@ -0,0 +1,38 @@
+
+#include "src/data.h"
+#include "src/config_tools.h"
+
+int main() {
+  // Parse the configuration
+  config_t *config = config_create();
+  char *config_file = "init.bl";
+  if (!config) {
+    fprintf(stderr, "Error: Failed to create config structure\n");
+    return 1;
+  }
+
+  if (config_parse_file(config, config_file) != 0) {
+    fprintf(stderr, "Error: Failed to parse config file\n");
+    config_destroy(config);
+    return 1;
+  }
+
+  printf("Successfully parsed Lisp config file: %s\n\n", config_file);
+
+  // Print all entries
+  config_print_all(config);
+  printf("\n");
+
+  // Demonstrate usage
+  printf("Example usage:\n");
+  printf("CTRL-s maps to: %s\n", config_get_key_mapping(config, "CTRL-s"));
+  printf("CTRL-f o maps to: %s\n", config_get_key_mapping(config, "CTRL-f o"));
+  printf("Window width: %d\n", config_get_int(config, "window-width", 1024));
+  printf("Theme: %s\n", config_get_string(config, "theme", "light"));
+  printf("Auto-save: %s\n",
+         config_get_bool(config, "auto-save", false) ? "enabled" : "disabled");
+  printf("Font size: %d\n", config_get_int(config, "font-size", 12));
+
+  config_destroy(config);
+  return 0;
+}
diff --git a/src/config_tools.c b/src/config_tools.c
new file mode 100644
index 0000000..1098633
--- /dev/null
+++ b/src/config_tools.c
@@ -0,0 +1,282 @@
+#include "../include/config_tools.h"
+#include "../include/data.h"
+#include <stdio.h>
+
+config_t *config_create(void) {
+  /*
+   * @brief Initialize config structure
+   */
+  config_t *config = malloc(sizeof(config_t));
+  if (config) {
+    config->key_mappings = NULL;
+    config->variables = NULL;
+  }
+  return config;
+}
+
+void free_node(node_t *node) {
+  int i;
+  if (!node)
+    return;
+
+  if (node->type == NODE_FUNCTION_CALL) {
+    for (i = 0; i < node->data.call.arg_count; i++) {
+      free_node(node->data.call.args[i]);
+    }
+    // free(node->data.call.args);
+  }
+
+  free(node);
+}
+
+void config_destroy(config_t *config) {
+  if (!config)
+    return;
+
+  key_mapping_t *mapping = config->key_mappings;
+  while (mapping) {
+    key_mapping_t *next = mapping->next;
+    free(mapping->key_combo);
+    free(mapping->function_name);
+    free(mapping);
+    mapping = next;
+  }
+
+  // Free variables
+  config_var_t *var = config->variables;
+  while (var) {
+    config_var_t *next = var->next;
+    free(var->name);
+    free_node(var->value);
+    free(var);
+    var = next;
+  }
+
+  free(config);
+}
+
+// Built-in function handlers
+int handle_map_key(config_t *config, node_t **args, int arg_count) {
+  if (arg_count != 2 || args[0]->type != NODE_STRING ||
+      args[1]->type != NODE_FUNCTION_REF) {
+    fprintf(stderr, "Error: map-key requires (key_combo, function_ref)\n");
+    return -1;
+  }
+
+  key_mapping_t *mapping = malloc(sizeof(key_mapping_t));
+  if (!mapping)
+    return -1;
+
+  mapping->key_combo = strdup(args[0]->data.string);
+  mapping->function_name = strdup(args[1]->data.function_ref);
+  mapping->next = config->key_mappings;
+  config->key_mappings = mapping;
+
+  return 0;
+}
+
+int handle_define(config_t *config, node_t **args, int arg_count) {
+  if (arg_count != 2 || args[0]->type != NODE_SYMBOL) {
+    fprintf(stderr, "Error: define requires (variable_name, value)\n");
+    return -1;
+  }
+
+  config_var_t *var = malloc(sizeof(config_var_t));
+  if (!var)
+    return -1;
+
+  var->name = strdup(args[0]->data.symbol);
+  var->value = args[1]; // Transfer ownership
+  var->next = config->variables;
+  config->variables = var;
+
+  return 0;
+}
+
+int execute_function_call(config_t *config, node_t *call) {
+  if (call->type != NODE_FUNCTION_CALL)
+    return -1;
+
+  // Look for built-in function
+  for (int i = 0; builtin_functions[i].name; i++) {
+    if (strcmp(call->data.call.function_name, builtin_functions[i].name) == 0) {
+      return builtin_functions[i].handler(config, call->data.call.args,
+                                          call->data.call.arg_count);
+    }
+  }
+
+  fprintf(stderr, "Error: Unknown function '%s'\n",
+          call->data.call.function_name);
+  return -1;
+}
+
+int config_parse_string(config_t *config, const char *input) {
+  lexer_t lexer = {0};
+  lexer.input = input;
+  lexer.pos = 0;
+  lexer.line = 1;
+  lexer.column = 1;
+  lexer.current_char = input[0];
+
+  while (lexer.current_char != '\0') {
+    printf("%c", lexer.current_char);
+    skip_whitespace(&lexer);
+    skip_comment(&lexer);
+    skip_whitespace(&lexer);
+
+    if (lexer.current_char == '\0')
+      break;
+    if (lexer.current_char == '\n') {
+      advance_char(&lexer);
+      continue;
+    }
+
+    node_t *stmt = parse_statement(&lexer);
+    if (stmt) {
+      if (execute_function_call(config, stmt) != 0) {
+        fprintf(stderr, "Error executing statement at line %d\n", lexer.line);
+      }
+      if (stmt->type != NODE_FUNCTION_CALL ||
+          strcmp(stmt->data.call.function_name, "define") != 0) {
+        free_node(stmt); // Don't free if ownership was transferred to define
+      }
+    }
+
+    // Skip to next line
+    while (lexer.current_char != '\n' && lexer.current_char != '\0') {
+      advance_char(&lexer);
+    }
+  }
+
+  return 0;
+}
+
+int config_parse_file(config_t *config, const char *filename) {
+  FILE *file = fopen(filename, "r");
+  long file_size = 0;
+  char *content = NULL;
+  int result = 0;
+  if (!file) {
+    perror("Error opening config file");
+    return -1;
+  }
+
+  fseek(file, 0, SEEK_END);
+  file_size = ftell(file);
+  fseek(file, 0, SEEK_SET);
+
+  content = (char *)malloc(file_size + 1);
+  if (!content) {
+    fclose(file);
+    return -1;
+  }
+
+  fread(content, 1, file_size, file);
+  content[file_size] = '\0';
+  fclose(file);
+
+  result = config_parse_string(config, content);
+  free(content);
+
+  return result;
+}
+
+// Getter functions
+
+const char *config_get_key_mapping(config_t *config, const char *key_combo) {
+  key_mapping_t *mapping = config->key_mappings;
+  while (mapping) {
+    if (strcmp(mapping->key_combo, key_combo) == 0) {
+      return mapping->function_name;
+    }
+    mapping = mapping->next;
+  }
+  return NULL;
+}
+
+node_t *find_variable(config_t *config, const char *name) {
+  config_var_t *var = config->variables;
+  while (var) {
+    if (strcmp(var->name, name) == 0) {
+      return var->value;
+    }
+    var = var->next;
+  }
+  return NULL;
+}
+
+const char *config_get_string(config_t *config, const char *path,
+                              const char *default_value) {
+  node_t *node = find_variable(config, path);
+  if (node && node->type == NODE_STRING) {
+    return node->data.string;
+  }
+  return default_value;
+}
+
+int config_get_int(config_t *config, const char *path, int default_value) {
+  node_t *node = find_variable(config, path);
+  if (node && node->type == NODE_NUMBER) {
+    return (int)node->data.number;
+  }
+  return default_value;
+}
+
+double config_get_double(config_t *config, const char *path,
+                         double default_value) {
+  node_t *node = find_variable(config, path);
+  if (node && node->type == NODE_NUMBER) {
+    return node->data.number;
+  }
+  return default_value;
+}
+
+bool config_get_bool(config_t *config, const char *path, bool default_value) {
+  node_t *node = find_variable(config, path);
+  if (node && node->type == NODE_BOOLEAN) {
+    return node->data.boolean;
+  }
+  return default_value;
+}
+
+void config_print_all(config_t *config) {
+  printf("Key Mappings:\n");
+  printf("%-20s -> %s\n", "Key Combination", "Function");
+  printf("%-20s    %s\n", "---------------", "--------");
+
+  key_mapping_t *mapping = config->key_mappings;
+  while (mapping) {
+    printf("%-20s -> %s\n", mapping->key_combo, mapping->function_name);
+    mapping = mapping->next;
+  }
+
+  printf("\nVariables:\n");
+  printf("%-20s = %s\n", "Name", "Value");
+  printf("%-20s   %s\n", "----", "-----");
+
+  config_var_t *var = config->variables;
+  while (var) {
+    printf("%-20s = ", var->name);
+
+    switch (var->value->type) {
+    case NODE_STRING:
+      printf("\"%s\"", var->value->data.string);
+      break;
+    case NODE_NUMBER:
+      printf("%g", var->value->data.number);
+      break;
+    case NODE_BOOLEAN:
+      printf("%s", var->value->data.boolean ? "true" : "false");
+      break;
+    case NODE_SYMBOL:
+      printf("%s", var->value->data.symbol);
+      break;
+    default:
+      printf("[unknown type]");
+      break;
+    }
+    printf("\n");
+
+    var = var->next;
+  }
+}
diff --git a/src/data.c b/src/data.c
new file mode 100644
index 0000000..3e32e3a
--- /dev/null
+++ b/src/data.c
@@ -0,0 +1,100 @@
+#include "../include/data.h"
+#include "../include/define.h"
+#include <string.h>
+
+void advance_char(lexer_t *lexer) {
+  if (lexer->current_char == '\n') {
+    lexer->line++;
+    lexer->column = 1;
+  } else {
+    lexer->column++;
+  }
+  lexer->pos++;
+  lexer->current_char = lexer->input[lexer->pos];
+}
+
+void skip_whitespace(lexer_t *lexer) {
+  while (isspace(lexer->current_char) && lexer->current_char != '\n') {
+    advance_char(lexer);
+  }
+}
+
+void skip_comment(lexer_t *lexer) {
+  if (lexer->current_char == '/' && lexer->input[lexer->pos + 1] == '/') {
+    while (lexer->current_char != '\n' && lexer->current_char != '\0') {
+      advance_char(lexer);
+    }
+  }
+}
+
+// Node creation functions
+node_t *create_node(node_type_t type) {
+  node_t *node = malloc(sizeof(node_t));
+  if (!node)
+    return NULL;
+
+  memset(node, 0, sizeof(node_t));
+  node->type = type;
+  return node;
+}
+
+node_t *create_symbol_node(const char *symbol) {
+  node_t *node = create_node(NODE_SYMBOL);
+  if (node) {
+    strncpy(node->data.symbol, symbol, MAX_SYMBOL_LENGTH - 1);
+    node->data.symbol[MAX_SYMBOL_LENGTH - 1] = '\0';
+  }
+  return node;
+}
+
+node_t *create_string_node(const char *string) {
+  node_t *node = create_node(NODE_STRING);
+  if (node) {
+    strncpy(node->data.string, string, MAX_STRING_LENGTH - 1);
+    node->data.string[MAX_STRING_LENGTH - 1] = '\0';
+  }
+  return node;
+}
+
+node_t *create_number_node(double number) {
+  node_t *node = create_node(NODE_NUMBER);
+  if (node) {
+    node->data.number = number;
+  }
+  return node;
+}
+
+node_t *create_boolean_node(bool value) {
+  node_t *node = create_node(NODE_BOOLEAN);
+  if (node) {
+    node->data.boolean = value;
+  }
+  return node;
+}
+
+node_t *create_function_ref_node(const char *function_name) {
+  node_t *node = create_node(NODE_FUNCTION_REF);
+  if (node) {
+    strncpy(node->data.function_ref, function_name, MAX_SYMBOL_LENGTH - 1);
+    node->data.function_ref[MAX_SYMBOL_LENGTH - 1] = '\0';
+  }
+  return node;
+}
+
+node_t *create_function_call_node(const char *function_name) {
+  node_t *node = create_node(NODE_FUNCTION_CALL);
+  if (node) {
+    strncpy(node->data.call.function_name, function_name,
+            MAX_SYMBOL_LENGTH - 1);
+    node->data.call.function_name[MAX_SYMBOL_LENGTH - 1] = '\0';
+    node->data.call.arg_count = 0;
+  }
+  return node;
+}
+
+void add_arg_to_call(node_t *call, node_t *arg) {
+  if (call->type == NODE_FUNCTION_CALL &&
+      call->data.call.arg_count < MAX_ARGS) {
+    call->data.call.args[call->data.call.arg_count++] = arg;
+  }
+}
diff --git a/src/lexer.c b/src/lexer.c
new file mode 100644
index 0000000..2783676
--- /dev/null
+++ b/src/lexer.c
@@ -0,0 +1,140 @@
+#include "../include/lexer.h"
+#include <stdio.h>
+
+token_t next_token(lexer_t *lexer) {
+  token_t token = {0};
+  token.line = lexer->line;
+  token.column = lexer->column;
+
+  skip_whitespace(lexer);
+  skip_comment(lexer);
+  skip_whitespace(lexer);
+
+  if (lexer->current_char == '\0') {
+    token.type = TOKEN_EOF;
+    return token;
+  }
+
+  // Newline (statement separator)
+  if (lexer->current_char == '\n') {
+    token.type = TOKEN_NEWLINE;
+    advance_char(lexer);
+    return token;
+  }
+
+  // Comma (function call indicator)
+  if (lexer->current_char == ',') {
+    token.type = TOKEN_COMMA;
+    token.value[0] = ',';
+    token.value[1] = '\0';
+    advance_char(lexer);
+    return token;
+  }
+
+  // Percent (function reference indicator)
+  if (lexer->current_char == '%') {
+    token.type = TOKEN_PERCENT;
+    token.value[0] = '%';
+    token.value[1] = '\0';
+    advance_char(lexer);
+    return token;
+  }
+
+  // Parentheses
+  if (lexer->current_char == '(') {
+    token.type = TOKEN_LPAREN;
+    token.value[0] = '(';
+    token.value[1] = '\0';
+    advance_char(lexer);
+    return token;
+  }
+
+  if (lexer->current_char == ')') {
+    token.type = TOKEN_RPAREN;
+    token.value[0] = ')';
+    token.value[1] = '\0';
+    advance_char(lexer);
+    return token;
+  }
+
+  // Strings
+  if (lexer->current_char == '"') {
+    token.type = TOKEN_STRING;
+    advance_char(lexer); // Skip opening quote
+
+    int i = 0;
+    while (lexer->current_char != '"' && lexer->current_char != '\0' &&
+           i < MAX_TOKEN_LENGTH - 1) {
+      if (lexer->current_char == '\\' && lexer->input[lexer->pos + 1] != '\0') {
+        advance_char(lexer);
+        switch (lexer->current_char) {
+        case 'n':
+          token.value[i++] = '\n';
+          break;
+        case 't':
+          token.value[i++] = '\t';
+          break;
+        case 'r':
+          token.value[i++] = '\r';
+          break;
+        case '\\':
+          token.value[i++] = '\\';
+          break;
+        case '"':
+          token.value[i++] = '"';
+          break;
+        default:
+          token.value[i++] = lexer->current_char;
+          break;
+        }
+      } else {
+        token.value[i++] = lexer->current_char;
+      }
+      advance_char(lexer);
+    }
+    token.value[i] = '\0';
+
+    if (lexer->current_char == '"') {
+      advance_char(lexer); // Skip closing quote
+    }
+    return token;
+  }
+
+  // Numbers, symbols, and booleans
+  if (isalnum(lexer->current_char) || lexer->current_char == '-' ||
+      lexer->current_char == '+' || lexer->current_char == '.' ||
+      lexer->current_char == '_') {
+
+    int i = 0;
+    while (
+        (isalnum(lexer->current_char) || strchr("-+._", lexer->current_char)) &&
+        i < MAX_TOKEN_LENGTH - 1) {
+      token.value[i++] = lexer->current_char;
+      advance_char(lexer);
+    }
+    token.value[i] = '\0';
+
+    // Check for booleans
+    if (strcmp(token.value, "true") == 0 || strcmp(token.value, "false") == 0) {
+      token.type = TOKEN_BOOLEAN;
+    } else {
+      // Check for numbers
+      char *endptr;
+      strtod(token.value, &endptr);
+      if (*endptr == '\0' && strlen(token.value) > 0 &&
+          (isdigit(token.value[0]) || token.value[0] == '-' ||
+           token.value[0] == '+')) {
+        token.type = TOKEN_NUMBER;
+      } else {
+        token.type = TOKEN_SYMBOL;
+      }
+    }
+    return token;
+  }
+
+  // Error case
+  token.type = TOKEN_ERROR;
+  snprintf(token.value, MAX_TOKEN_LENGTH, "Unexpected character '%c'",
+           lexer->current_char);
+  return token;
+}
diff --git a/src/parser.c b/src/parser.c
new file mode 100644
index 0000000..ebf9557
--- /dev/null
+++ b/src/parser.c
@@ -0,0 +1,85 @@
+#include "../include/parser.h"
+
+node_t *parse_atom(lexer_t *lexer, token_t *token) {
+  switch (token->type) {
+  case TOKEN_SYMBOL:
+    return create_symbol_node(token->value);
+
+  case TOKEN_STRING:
+    return create_string_node(token->value);
+
+  case TOKEN_NUMBER:
+    return create_number_node(atof(token->value));
+
+  case TOKEN_BOOLEAN:
+    return create_boolean_node(strcmp(token->value, "true") == 0);
+
+  case TOKEN_PERCENT: {
+    // Parse function reference: %function-name
+    token_t next = next_token(lexer);
+    if (next.type == TOKEN_SYMBOL) {
+      return create_function_ref_node(next.value);
+    }
+    return NULL;
+  }
+
+  default:
+    return NULL;
+  }
+}
+
+node_t *parse_function_call(lexer_t *lexer, const char *function_name) {
+  node_t *call = create_function_call_node(function_name);
+  if (!call)
+    return NULL;
+
+  token_t token = next_token(lexer);
+  if (token.type != TOKEN_LPAREN) {
+    // Function call without parentheses - no arguments
+    printf("no paren\n");
+    return call;
+  }
+
+  // Parse arguments
+  token = next_token(lexer);
+  while (token.type != TOKEN_RPAREN && token.type != TOKEN_EOF) {
+    node_t *arg = NULL;
+
+    if (token.type == TOKEN_PERCENT) {
+      // Function reference argument
+      token_t func_token = next_token(lexer);
+      if (func_token.type == TOKEN_SYMBOL) {
+        arg = create_function_ref_node(func_token.value);
+      }
+    } else {
+      // Regular argument
+      arg = parse_atom(lexer, &token);
+    }
+
+    if (arg) {
+      add_arg_to_call(call, arg);
+    }
+
+    token = next_token(lexer);
+  }
+
+  return call;
+}
+
+node_t *parse_statement(lexer_t *lexer) {
+  skip_whitespace(lexer);
+  skip_comment(lexer);
+  skip_whitespace(lexer);
+
+  token_t token = next_token(lexer);
+
+  if (token.type == TOKEN_COMMA) {
+    // Function call: ,function-name(args)
+    token_t func_token = next_token(lexer);
+    if (func_token.type == TOKEN_SYMBOL) {
+      return parse_function_call(lexer, func_token.value);
+    }
+  }
+
+  return NULL;
+}