Implementing Alts

examples/alt-sequence-syntax/main.hank

@@ -0,0 +1,4 @@
+- (sequence_example) {once: one|two} {sequence: | |three|four|-> cycle_example}
+-> sequence_example
+- (cycle_example) {cycle: one|two |three|four}
+-> cycle_example

examples/alt-sequence-syntax/partialtest1.hlog

@@ -0,0 +1,20 @@
+one
+two
+three
+four
+one
+two
+three
+four
+one
+two
+three
+four
+one
+two
+three
+four
+one
+two
+three
+four

examples/diverts/test1.hlog

@@ -1,6 +1,6 @@
 First output. 1 1 0 1
 Second output. 1 1 1 1
- 1 1 1 2
+1 1 1 2
 Third output.
 Fourth output.
 Fifth output.