python regex-based preprocessor proof of concept

tests_ispcpp/hello.ispc

@@ -0,0 +1,11 @@
+export void saxpy(uniform int N,
+                  uniform floating<0> scale,
+                  uniform floating<1> X[],
+                  uniform floating<1> Y[],
+                  uniform floating<2> result[])
+{
+    foreach (i = 0 ... N) {
+        floating<2> tmp = scale * X[i] + Y[i];
+        result[i] = tmp;
+    }
+}