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Task/Inverted-syntax/EchoLisp/inverted-syntax.echolisp

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+;; use reader macros to transform (a OP b) into (OP b a)
+
+(lib 'match)
+(define-macro invert-= (a <- b) (set! b a))
+(define-macro invert-IF (a 'IF b) (when b a))
+
+(define raining #f)
+
+(#t <- raining)
+raining
+    → #t
+('umbrella-need IF raining)
+    → umbrella-need
+
+(#f <- raining)
+('umbrella-need IF raining)
+    → #f
+
+;; debug mode
+(debug 3)
+('umbrella-need IF raining)
+💡 [0]     invert-IF → ('umbrella-need IF raining)
+compiled :: (#when raining 'umbrella-need)