Update mutual recursion error message

src/hvmc_net/mutual_recursion.message

@@ -2,13 +2,17 @@ Seems like you're trying to run some recursive function(s) on strict-mode:
 {refs}
 
 Due to the ultra-greedy nature of strict-mode, that might result in infinite loops.
+If the float-combinators optimization is not on, we recommend activating it.
 
 You have 2 options:
 
 1. Easy Fix: use lazy-mode.
 
 Just append the `-L` option to `HVM-Lang`, and it will run in lazy-mode. It has the advantage of not doing wasteful work, having an improved complexity class, and being compatible with unrestricted recursion! It has a small overhead though, and isn't compatible with GPU.
 
-2. Hard Fix: use combinators.
+2. Hard Fix: refactor the program to use lazy references.
 
-By converting your program to use combinators, you can avoid the direct recursive calls that result in loops. If you use the built-in `data` and `match` syntaxes, HVM-Lang usually does this for you, but it couldn't handle your program. See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.
+When a function reference is in head position of an application or is duplicated by the non-linear use of a `let` expression it will be greedly expanded, leading to an infinite loop.
+If the application is used written as a combinator, it will automatically lifted to a lazy reference, which usually breaks the recursion cycle. Alternatively, by using the built-in `data` and `match` syntax, hvm-lang will try to do this automatically.
+For let expressions where the variable is non-linear (used more than once), you can instead employ `use` expressions to statically duplicate the offending recursive term.
+See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.

tests/snapshots/compile_file_o_all__repeated_name_trucation.hvm.snap

@@ -8,16 +8,20 @@ long_name_that_truncates
 long_name_that_truncates$C0
 
 Due to the ultra-greedy nature of strict-mode, that might result in infinite loops.
+If the float-combinators optimization is not on, we recommend activating it.
 
 You have 2 options:
 
 1. Easy Fix: use lazy-mode.
 
 Just append the `-L` option to `HVM-Lang`, and it will run in lazy-mode. It has the advantage of not doing wasteful work, having an improved complexity class, and being compatible with unrestricted recursion! It has a small overhead though, and isn't compatible with GPU.
 
-2. Hard Fix: use combinators.
+2. Hard Fix: refactor the program to use lazy references.
 
-By converting your program to use combinators, you can avoid the direct recursive calls that result in loops. If you use the built-in `data` and `match` syntaxes, HVM-Lang usually does this for you, but it couldn't handle your program. See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.
+When a function reference is in head position of an application or is duplicated by the non-linear use of a `let` expression it will be greedly expanded, leading to an infinite loop.
+If the application is used written as a combinator, it will automatically lifted to a lazy reference, which usually breaks the recursion cycle. Alternatively, by using the built-in `data` and `match` syntax, hvm-lang will try to do this automatically.
+For let expressions where the variable is non-linear (used more than once), you can instead employ `use` expressions to statically duplicate the offending recursive term.
+See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.
 
 
 @long_name_that_truncates = (* @long_name_that_truncates$C0)

tests/snapshots/mutual_recursion__a_b_c.hvm.snap

@@ -9,13 +9,17 @@ B
 C
 
 Due to the ultra-greedy nature of strict-mode, that might result in infinite loops.
+If the float-combinators optimization is not on, we recommend activating it.
 
 You have 2 options:
 
 1. Easy Fix: use lazy-mode.
 
 Just append the `-L` option to `HVM-Lang`, and it will run in lazy-mode. It has the advantage of not doing wasteful work, having an improved complexity class, and being compatible with unrestricted recursion! It has a small overhead though, and isn't compatible with GPU.
 
-2. Hard Fix: use combinators.
+2. Hard Fix: refactor the program to use lazy references.
 
-By converting your program to use combinators, you can avoid the direct recursive calls that result in loops. If you use the built-in `data` and `match` syntaxes, HVM-Lang usually does this for you, but it couldn't handle your program. See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.
+When a function reference is in head position of an application or is duplicated by the non-linear use of a `let` expression it will be greedly expanded, leading to an infinite loop.
+If the application is used written as a combinator, it will automatically lifted to a lazy reference, which usually breaks the recursion cycle. Alternatively, by using the built-in `data` and `match` syntax, hvm-lang will try to do this automatically.
+For let expressions where the variable is non-linear (used more than once), you can instead employ `use` expressions to statically duplicate the offending recursive term.
+See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.

tests/snapshots/mutual_recursion__multiple.hvm.snap

@@ -12,13 +12,17 @@ I
 ...
 
 Due to the ultra-greedy nature of strict-mode, that might result in infinite loops.
+If the float-combinators optimization is not on, we recommend activating it.
 
 You have 2 options:
 
 1. Easy Fix: use lazy-mode.
 
 Just append the `-L` option to `HVM-Lang`, and it will run in lazy-mode. It has the advantage of not doing wasteful work, having an improved complexity class, and being compatible with unrestricted recursion! It has a small overhead though, and isn't compatible with GPU.
 
-2. Hard Fix: use combinators.
+2. Hard Fix: refactor the program to use lazy references.
 
-By converting your program to use combinators, you can avoid the direct recursive calls that result in loops. If you use the built-in `data` and `match` syntaxes, HVM-Lang usually does this for you, but it couldn't handle your program. See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.
+When a function reference is in head position of an application or is duplicated by the non-linear use of a `let` expression it will be greedly expanded, leading to an infinite loop.
+If the application is used written as a combinator, it will automatically lifted to a lazy reference, which usually breaks the recursion cycle. Alternatively, by using the built-in `data` and `match` syntax, hvm-lang will try to do this automatically.
+For let expressions where the variable is non-linear (used more than once), you can instead employ `use` expressions to statically duplicate the offending recursive term.
+See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.

tests/snapshots/mutual_recursion__odd_even.hvm.snap

@@ -8,13 +8,17 @@ isEven
 isOdd
 
 Due to the ultra-greedy nature of strict-mode, that might result in infinite loops.
+If the float-combinators optimization is not on, we recommend activating it.
 
 You have 2 options:
 
 1. Easy Fix: use lazy-mode.
 
 Just append the `-L` option to `HVM-Lang`, and it will run in lazy-mode. It has the advantage of not doing wasteful work, having an improved complexity class, and being compatible with unrestricted recursion! It has a small overhead though, and isn't compatible with GPU.
 
-2. Hard Fix: use combinators.
+2. Hard Fix: refactor the program to use lazy references.
 
-By converting your program to use combinators, you can avoid the direct recursive calls that result in loops. If you use the built-in `data` and `match` syntaxes, HVM-Lang usually does this for you, but it couldn't handle your program. See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.
+When a function reference is in head position of an application or is duplicated by the non-linear use of a `let` expression it will be greedly expanded, leading to an infinite loop.
+If the application is used written as a combinator, it will automatically lifted to a lazy reference, which usually breaks the recursion cycle. Alternatively, by using the built-in `data` and `match` syntax, hvm-lang will try to do this automatically.
+For let expressions where the variable is non-linear (used more than once), you can instead employ `use` expressions to statically duplicate the offending recursive term.
+See here for more info: https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md.