fidlcparsequality is a simple tool which measures the quality of the error reporting of the
fidlc compiler. It works by taking a base library, and running the compiler on successively mutated version of this base library, then collecting and categorizing the errors reported by the compiler.
fx set core.x64 --with //tools/fidl/fidlcparsequality:host fx build
./out/default/host_x64/fidlcparsequality --fidlc out/default/host_x64/fidlc
runs: 7382, hardExits: 0, unknownErr 0 ^Invalid library name component .*: 212 ^Multiple struct fields with the same name;: 6 ^cannot specify strictness for .*: 1 ^invalid character .*: 27 ^invalid identifier .*: 15 ^unexpected identifier .*, was expecting .*: 1047 ^unexpected token .*, was expecting .*: 2108 ^unknown type .*: 2388