Kaleidoscope | Keyboardio Model 01 and other keyboards with AVR

Define chrome driver instance outside of the for loop.I haven't testes but This should work.

The problem seems to be that uninitialized global variables are somehow optimized out and not added to the symbol table.

A quick work around to ensure that the variable gets added to the symbol table is to initialize it with an "Undefined value".

The following code allows to do such an initialization with the c++ api

Do you mean when the user type the first letter and then press enter for example?

If so, you can remove tags which are not in the source list by return false in the beforeTagSave callback.

Like this:

All of Kaleidoscope's operators are left-associative, which allows a simplification in the operator-precedence algorithm, at the cost of a lack of flexibility [Note 1]. So it probably is not a good basis for implementing operator-precedence parsers.

The main loop in ParseBinOp combines a series of equal-precedence operators, avoiding recursion. When it encounters a higher precedence operator, though, it must recurse, and it needs to do so in a way that will not absorb too much of the rest of the expression. In particular, the recursive call must not absorb an operator of equal precedence. Hence the + 1.

If you remove the +1 then certain expressions will be parsed as though some of their operators were right-associative. It might be a bit tricky to find a counterexample, particularly since the only non-commutative operators are - and <. Without actually trying, I guess that you would get an incorrect parse of a-b*c-d.

1. This comes home to roost later, when assignment is added to the language. Assignment is usually right-associative to allow chained assignments, but Kaleidoscope forces the use of parentheses: x = ( y = 0 ).

Here's a few things I found out by reading the LLVM source:

• The output assembly syntax is controlled by the AssemblyDialect member in llvm::MCAsmInfo. For x86 the derived classes of llvm::MCAsmInfo can be found in X86MCAsmInfo.h and X86MCAsmInfo.cpp.
• The member AssemblyDialect is initialized to the value of AsmWriterFlavor, which is set by the command line option x86-asm-syntax.

As far as I could tell AssemblyDialect isn't referenced anywhere else in the code base, so the only way to set it is by the x86-asm-syntax flag. For that you can use llvm::cl::ParseCommandLineOptions. Minimal example for setting the assembly syntax to intel:

I figured it out— I was missing that I need to call llvmlite.binding.load_library_permanently(filename) in order for the external symbols to become available. Even though the library is already in memory, the function still needs to be invoked. (This corresponds to the LLVM native function llvm::sys::DynamicLibrary::LoadLibraryPermanently()).

From this answer, it appears calling the above function with nullptr will import all the symbols available to the process.

Oddly, on OSX, I found that the external symbols were available even though load_library_permanently() had not been explicitly called— I'm not sure why this is (perhaps the OSX build of llvmlite itself happened to call the function with nullptr, as above?).

I think the problem might be that $(llvm-config --cxxflags) doesn't work properly in macOS. I don't know exactly what it is with --cxxflags, but I personally experienced a problem that $(llvm-config --libfiles) didn't return the correct path to the shared library libLLVM in macOS (that command worked in Linux anyway).

However, I suggest to use CMake, which you will need anyway when working with LLVM. Below is a sample CMake code copied from the LLVM website. I followed this CMake code and can compile my project in macOS.

This is due to not having opam package ctypes-foreign installed.

You can prepare each image for "kaleidoscope" separately and then paste it onto resulted image: