diff --git a/src/translate_c.zig b/src/translate_c.zig index a6715d161c..7fd4b93821 100644 --- a/src/translate_c.zig +++ b/src/translate_c.zig @@ -1748,7 +1748,8 @@ fn transBinaryOperator( const lhs_expr = stmt.getLHS(); const lhs_qt = getExprQualType(c, lhs_expr); const lhs_qt_translated = try transQualType(c, scope, lhs_qt, lhs_expr.getBeginLoc()); - const elem_type = lhs_qt_translated.castTag(.c_pointer).?.data.elem_type; + const c_pointer = getContainer(c, lhs_qt_translated).?; + const elem_type = c_pointer.castTag(.c_pointer).?.data.elem_type; const sizeof = try Tag.sizeof.create(c.arena, elem_type); const bitcast = try Tag.bit_cast.create(c.arena, .{ .lhs = ptrdiff_type, .rhs = infixOpNode }); diff --git a/test/translate_c.zig b/test/translate_c.zig index d2db895a5a..92dc3038c0 100644 --- a/test/translate_c.zig +++ b/test/translate_c.zig @@ -3916,4 +3916,36 @@ pub fn addCases(cases: *tests.TranslateCContext) void { \\ }) != 0) {} \\} }); + + if (builtin.os.tag == .windows) { + cases.add("Pointer subtraction with typedef", + \\typedef char* S; + \\void foo() { + \\ S a, b; + \\ long long c = a - b; + \\} + , &[_][]const u8{ + \\pub export fn foo() void { + \\ var a: S = undefined; + \\ var b: S = undefined; + \\ var c: c_longlong = @divExact(@bitCast(c_longlong, @ptrToInt(a) -% @ptrToInt(b)), @sizeOf(u8)); + \\ _ = @TypeOf(c); + \\} + }); + } else { + cases.add("Pointer subtraction with typedef", + \\typedef char* S; + \\void foo() { + \\ S a, b; + \\ long c = a - b; + \\} + , &[_][]const u8{ + \\pub export fn foo() void { + \\ var a: S = undefined; + \\ var b: S = undefined; + \\ var c: c_long = @divExact(@bitCast(c_long, @ptrToInt(a) -% @ptrToInt(b)), @sizeOf(u8)); + \\ _ = @TypeOf(c); + \\} + }); + } }