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authorTim Foley <tfoley@nvidia.com>2017-07-18 14:51:12 -0700
committerTim Foley <tfoley@nvidia.com>2017-07-18 14:51:12 -0700
commit2476c035ec15d3ee22239ebd1fe10e6e8c1e01e3 (patch)
tree30e1bf209e232d7f8d6723959db68b2c0cb015dd /source/slang/compiler.cpp
parent3d313d963f29f6ca6a8d12bd5c403a70c49aca2a (diff)
Add a compile-time loop construct to Slang
The basic syntax is: $for(i in Range(0,99)) { /* stuff goes here */ } Note that the exact form is very restrictive. All that you are allowed to change is `i`, `0`, `99` or `/* stuff goes here */`. As a tiny bit of syntax sugar, the following should work: $for(i in Range(99)) { /* stuff goes here */ } Note that the range given is half-open (C++ iterator `[begin,end)` style). Both the beginning and end of the range must be compile-time constant expressions that Slang knows how to constant-fold. The implementation will basically generate code for `/* stuff goes here */` N times, once for each value in the half-open range. Each time, the variable `i` will be replaced with a different compile-time-constant expression. While I was working on a test case for this, I also found that our build of glslang had an issue with resource limits, so I fixed that. Clients will need to build a new glslang to use the fix.
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