1 files changed, 45 insertions, 0 deletions
diff --git a/src/formatter/types.c b/src/formatter/types.c
new file mode 100644
index 00000000..e52faf70
--- /dev/null
+++ b/src/formatter/types.c
@@ -0,0 +1,45 @@
+// Logic for formatting types
+
+#include "../ast.h"
+#include "../stdlib/datatypes.h"
+#include "../stdlib/stdlib.h"
+#include "../stdlib/text.h"
+#include "args.h"
+#include "formatter.h"
+
+Text_t format_type(type_ast_t *type) {
+    switch (type->tag) {
+    case VarTypeAST: return Text$from_str(Match(type, VarTypeAST)->name);
+    case PointerTypeAST: {
+        DeclareMatch(ptr, type, PointerTypeAST);
+        return Texts(ptr->is_stack ? Text("&") : Text("@"), format_type(ptr->pointed));
+    }
+    case ListTypeAST: {
+        return Texts("[", format_type(Match(type, ListTypeAST)->item), "]");
+    }
+    case SetTypeAST: {
+        return Texts("|", format_type(Match(type, SetTypeAST)->item), "|");
+    }
+    case TableTypeAST: {
+        DeclareMatch(table, type, TableTypeAST);
+        Text_t code = Texts("{", format_type(table->key), "=", format_type(table->value));
+        if (table->default_value) {
+            OptionalText_t val = format_inline_code(table->default_value, (Table_t){});
+            assert(val.length >= 0);
+            code = Texts(code, "; default=", val);
+        }
+        return Texts(code, "}");
+    }
+    case FunctionTypeAST: {
+        DeclareMatch(func, type, FunctionTypeAST);
+        Text_t code = Texts("func(", format_inline_args(func->args, (Table_t){}));
+        if (func->ret) code = Texts(code, func->args ? Text(" -> ") : Text("-> "), format_type(func->ret));
+        return Texts(code, ")");
+    }
+    case OptionalTypeAST: {
+        return Texts(format_type(Match(type, OptionalTypeAST)->type), "?");
+    }
+    case UnknownTypeAST:
+    default: fail("Invalid Type AST");
+    }
+}