Dream of my own C compiler

packages/tcc/src/Sym.zig

@@ -0,0 +1,65 @@
+const std = @import("std");
+const Self = @This();
+
+const CType = @import("CType.zig");
+const SValue = @import("SValue.zig");
+
+v: u32,
+r: SValue.Register,
+a: SymAttr,
+u: extern union {
+    s: extern struct {
+        c: u32,
+        u: extern union {
+            sym_scope: u32,
+            jnext: u32,
+            f: FuncAttr,
+            auxtype: u32,
+        },
+    },
+    enum_val: u64,
+    d: ?*u32,
+},
+type: CType,
+w: extern union {
+    next: ?*Self,
+    asm_label: u32,
+},
+prev: ?*Self,
+prev_tok: ?*Self,
+
+pub const SymAttr = packed struct(u16) {
+    /// log2(align) + 1 (0 means unspecified)
+    aligned: u5 = 0,
+    @"packed": bool = false,
+    weak: bool = 0,
+    visibility: Visibility = .default,
+    dllexport: bool = false,
+    dllimport: bool = false,
+    _unused: u5 = 0,
+};
+
+pub const Visibility = enum(u2) {
+    default = 0,
+    internal = 1,
+    hidden = 2,
+    protected = 3,
+};
+
+pub const FuncAttr = packed struct(u32) {
+    func_call: enum(u3) {
+        cdecl = 0,
+        stdcall = 1,
+        fastcall1 = 2,
+        fastcall2 = 3,
+        fastcall3 = 4,
+        fastcallw = 5,
+    },
+    func_type: enum(u2) {
+        new = 1,
+        old = 2,
+        ellipsis = 3,
+    },
+    func_args: u8,
+    _unused: u19,
+};