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Update cycle error message
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@ -36,6 +36,7 @@
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"interner",
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"interner",
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"itertools",
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"itertools",
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"lcons",
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"lcons",
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"linearization",
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"linearizes",
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"linearizes",
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"linearizing",
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"linearizing",
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"lnet",
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"lnet",
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@ -40,7 +40,7 @@ This code will work as expected, because `Nat.add` is unrolled lazily only when
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### Automatic optimization
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### Automatic optimization
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HVM-lang carries out [match linearization](compiler-options#linearize-matches) and [combinator floating](compiler-options#float-combinators) optimizations, enabled through the CLI, which is active by default in strict mode.
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HVM-lang carries out [match linearization](compiler-options#linearize-matches) and [combinator floating](compiler-options#float-combinators) optimizations, enabled through the CLI, which are active by default in strict mode.
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Consider the code below:
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Consider the code below:
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@ -13,7 +13,17 @@ pub fn check_cycles(book: &Book) -> Result<(), String> {
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let graph = Graph::from(book);
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let graph = Graph::from(book);
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let cycles = graph.cycles();
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let cycles = graph.cycles();
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if cycles.is_empty() { Ok(()) } else { Err(pretty_print_cycles(&cycles)) }
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if cycles.is_empty() {
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Ok(())
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} else {
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Err(format!(
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"{}\n{}\n{}\n{}",
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"Mutual recursion cycle detected in compiled funcions:",
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pretty_print_cycles(&cycles),
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"This program will expand infinitely in strict evaluation mode.",
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"Read https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md for more information."
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))
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}
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}
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}
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fn pretty_print_cycles(cycles: &[Vec<Ref>]) -> String {
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fn pretty_print_cycles(cycles: &[Vec<Ref>]) -> String {
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11
tests/golden_tests/mutual_recursion/multiple.hvm
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11
tests/golden_tests/mutual_recursion/multiple.hvm
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@ -0,0 +1,11 @@
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(A) = (B)
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(B) = (C)
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(C) = (A)
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(H) = (I)
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(I) = (H)
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(M) = (N)
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(N) = (M)
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(Main) = *
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@ -2,4 +2,7 @@
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source: tests/golden_tests.rs
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source: tests/golden_tests.rs
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input_file: tests/golden_tests/mutual_recursion/a_b_c.hvm
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input_file: tests/golden_tests/mutual_recursion/a_b_c.hvm
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---
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---
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Mutual recursion cycle detected in compiled funcions:
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Cycle 1: A -> B -> C
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Cycle 1: A -> B -> C
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This program will expand infinitely in strict evaluation mode.
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Read https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md for more information.
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10
tests/snapshots/mutual_recursion__multiple.hvm.snap
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10
tests/snapshots/mutual_recursion__multiple.hvm.snap
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@ -0,0 +1,10 @@
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---
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source: tests/golden_tests.rs
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input_file: tests/golden_tests/mutual_recursion/multiple.hvm
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---
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Mutual recursion cycle detected in compiled funcions:
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Cycle 1: A -> B -> C
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Cycle 2: H -> I
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Cycle 3: M -> N
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This program will expand infinitely in strict evaluation mode.
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Read https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md for more information.
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@ -2,4 +2,7 @@
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source: tests/golden_tests.rs
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source: tests/golden_tests.rs
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input_file: tests/golden_tests/mutual_recursion/odd_even.hvm
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input_file: tests/golden_tests/mutual_recursion/odd_even.hvm
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---
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---
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Mutual recursion cycle detected in compiled funcions:
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Cycle 1: isEven -> isOdd
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Cycle 1: isEven -> isOdd
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This program will expand infinitely in strict evaluation mode.
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Read https://github.com/HigherOrderCO/hvm-lang/blob/main/docs/lazy-definitions.md for more information.
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