Write Jinja2-style templates in C++. Uses lua as a scripting language (very lightweight)
I use luacpptemplater for templating OpenCL kernels, eg https://github.com/hughperkins/cltorch/blob/master/src/lib/THClScatter.cl. Enabling/disabling chunks of code:
{% if scatterFill then %}
kernel void THClTensor_kernel_scatterFill(
...
{% end %}
Unrolling loops:
int linearId = _linearId; // copy it, since we'll modify it
int curDimIndex;
{% for d=dims-1,0,-1 do %}
curDimIndex = linearId % idx_info->sizes[{{d}}];
idxOffset += curDimIndex * idx_info->strides[{{d}}];
if( {{d}} != dim ) { // this only matters for the source, the others are
// unaffected by which dimension we are on. I think.
dstOffset += curDimIndex * dst_info->strides[{{d}}];
}
linearId /= idx_info->sizes[{{d}}];
{% end %}
- contains a lua scripting engine, which is very lightweight
- can use the entire power of lua scripting inside your templates
- mostly I just use loops and
ifblocks, but the sky is the limit. The entire power of lua scripting is at our disposal
git clone https://github.com/hughperkins/luacpptemplater
cd luacpptemplater
mkdir build
cd build
ccmake ..
# press 'c'
# select the options you want
# press 'c'
# press 'g'
make -j 4 install
=> the unit test (if selected) will install into ../dist/bin, and the library will be built into ../dist/lib (assuming
linux)
You can run ../dist/bin/luacpptemplater_unittests to convince yourself everything is working ok
- link with libluacpptemplater.so
- there is a .cmake file you can import from cmakelists, at
../dist/lib/luacpptemplater/luacpptemplater-targets.cmake
- it basically uses the code from https://john.nachtimwald.com/2014/08/06/using-lua-as-a-templating-engine/ I think I did make some tweaks to it, and provided c++ wrapping around it, but basically it's John Nachtimwald's idea and core implementation. His idea is very cool :-)
- initially, I dabbled with writing a templating engine in pure C++, ie Jinja2CppLight
- however, it quickly became apparent that I was gradually reinventing my own scripting language from scratch...
- So I hunted around for a Lua solution, which I found at https://john.nachtimwald.com/2014/08/06/using-lua-as-a-templating-engine/
- This worked great for me, and I've never looked back :-)
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