[BUG] Can't use `sizeof`

[JohelEGP]

Title: Can't use sizeof.

Minimal reproducer (https://cpp2.godbolt.org/z/8bs65Tzcz): main: () -> int = sizeof(i32);

Commands:

cppfront main.cpp2
clang++17 -std=c++23 -stdlib=libc++ -lc++abi -pedantic-errors -Wall -Wextra -Wconversion -fsanitize=undefined -Werror=unused-result -I . main.cpp

Expected result: Program returned: 4.

Actual result and error: main.cpp2(1,25): error: use 'sizeof(()', not 'sizeof ('.

[hsutter]

Thanks. That's a migration diagnostic, and it should check that the next character isn't ( before complaining!