1 files changed, 63 insertions, 0 deletions
diff --git a/42sh/src/parser/parser_fundec.c b/42sh/src/parser/parser_fundec.c
new file mode 100644
index 0000000..08d4816
--- /dev/null
+++ b/42sh/src/parser/parser_fundec.c
@@ -0,0 +1,63 @@
+#include "parser/parser_functions.h"
+#include "parser/parser_utils.h"
+
+struct ast *parse_funcdec(struct lexer *lexer, enum parser_state *state,
+                          struct string *txt)
+{
+    struct ast *function = ast_create(AST_FUNCTION);
+    if (function == NULL)
+    {
+        QUICK_CLEANUP
+    }
+
+    struct token next = lexer_peek(lexer);
+
+    if (txt == NULL && next.type != TOKEN_WORD)
+    {
+        cleanup(function, state);
+        return NULL;
+    }
+    else if (txt == NULL)
+    {
+        ((struct ast_function *)function)->name = next.value;
+        lexer_pop(lexer);
+        next = lexer_peek(lexer);
+    }
+    else
+    {
+        // If we used the word in the txt variable, no need to peek
+        ((struct ast_function *)function)->name = txt;
+    }
+
+    if (next.type != TOKEN_PAR_LEFT)
+    {
+        cleanup(function, state);
+        return NULL;
+    }
+
+    lexer_pop(lexer);
+    next = lexer_peek(lexer);
+
+    if (next.type != TOKEN_PAR_RIGHT)
+    {
+        cleanup(function, state);
+        return NULL;
+    }
+
+    lexer_pop(lexer);
+    next = lexer_peek(lexer);
+
+    clean_cons_tokens(TOKEN_NEWLINE, lexer);
+
+    struct ast *body = parse_shell_command(lexer, state);
+    next = lexer_peek(lexer);
+
+    if (error_check(function, state, next))
+    {
+        return NULL;
+    }
+
+    set_left(function, body);
+
+    return function;
+}