CIL

CIL is a programming language created in 1994.

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Cilk, Cilk++ and Cilk Plus are general-purpose programming languages designed for multithreaded parallel computing. They are based on the C and C++ programming languages, which they extend with constructs to express parallel loops and the fork–join idiom. Originally developed in the 1990s at the Massachusetts Institute of Technology (MIT) in the group of Charles E. Read more on Wikipedia...

CIL website
CIL Wikipedia page
There are at least 1 CIL repos on GitHub
CIL first developed in Intel
file extensions for CIL include cil
Explore CIL snippets on Rosetta Code
CIL on HOPL
CIL appears in the TIOBE Index
cilk.com was registered in 1999
See also: (4 related languages)C, OpenCL, NESL, UPC

Example from Wikipedia:

// y ← α x + y
 void axpy(int n, float alpha, const float *x, float *y)
 {
     for (int i = 0; i < n; i++) {
         y[i] += alpha * x[i];
     }
 }

Feature	Supported	Token	Example
Comments	✓		// A comment
Line Comments	✓	//	// A comment
Semantic Indentation	X

CIL - Programming language

Language features