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https://github.com/HigherOrderCO/Bend.git
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Add unbound refs check
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@ -1,3 +1,4 @@
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pub mod set_entrypoint;
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pub mod shared_names;
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pub mod unbound_refs;
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pub mod unbound_vars;
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37
src/fun/check/unbound_refs.rs
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37
src/fun/check/unbound_refs.rs
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@ -0,0 +1,37 @@
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use crate::{
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diagnostics::Diagnostics,
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fun::{Ctx, Definitions, Name, Term},
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maybe_grow,
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};
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use std::collections::HashSet;
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impl Ctx<'_> {
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pub fn check_unbound_refs(&mut self) -> Result<(), Diagnostics> {
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self.info.start_pass();
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for def in self.book.defs.values() {
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let mut unbounds = HashSet::new();
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for rule in def.rules.iter() {
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rule.body.check_unbound_refs(&self.book.defs, &mut unbounds);
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}
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for unbound in unbounds {
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self.info.add_rule_error(format!("Reference to undefined function '{unbound}'"), def.name.clone());
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}
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}
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self.info.fatal(())
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}
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}
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impl Term {
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pub fn check_unbound_refs(&self, defs: &Definitions, unbounds: &mut HashSet<Name>) {
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maybe_grow(|| {
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if let Term::Ref { nam } = self {
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if !defs.contains_key(nam) {
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unbounds.insert(nam.clone());
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}
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}
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for child in self.children() {
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child.check_unbound_refs(defs, unbounds);
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}
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})
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}
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}
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@ -36,7 +36,7 @@ impl Ctx<'_> {
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#[derive(Debug, Clone, Default)]
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pub struct Book {
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/// The function definitions.
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pub defs: IndexMap<Name, Definition>,
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pub defs: Definitions,
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/// The algebraic datatypes defined by the program
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pub adts: Adts,
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@ -48,6 +48,7 @@ pub struct Book {
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pub entrypoint: Option<Name>,
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}
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pub type Definitions = IndexMap<Name, Definition>;
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pub type Adts = IndexMap<Name, Adt>;
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pub type Constructors = IndexMap<Name, Name>;
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@ -140,6 +140,8 @@ pub fn desugar_book(
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ctx.book.float_combinators(MAX_NET_SIZE);
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}
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ctx.check_unbound_refs()?;
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ctx.prune(opts.prune);
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if opts.merge {
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11
tests/golden_tests/hangs/bad_dup_interaction.bend
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11
tests/golden_tests/hangs/bad_dup_interaction.bend
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@ -0,0 +1,11 @@
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# A net that expands inifinitely like church exponentiation
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# Compiles to this net:
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# a
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# & ({(b c) (d b)} (c d)) ~ {(e a) e}
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main =
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let {a1 a2} =
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@b
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let {b1 b2} = b
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let (c1, c2) = b2
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((b1 c2), c1)
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(a1 a2)
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10
tests/golden_tests/run_file/unbound_wrap.bend
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10
tests/golden_tests/run_file/unbound_wrap.bend
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@ -0,0 +1,10 @@
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type Maybe = (Some x) | None
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Maybe/bind val nxt = match val {
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Maybe/Some: (nxt val.x)
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Maybe/None: Maybe/None
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}
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main = with Maybe {
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(wrap 1)
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}
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7
tests/snapshots/run_file__unbound_wrap.bend.snap
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7
tests/snapshots/run_file__unbound_wrap.bend.snap
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@ -0,0 +1,7 @@
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---
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source: tests/golden_tests.rs
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input_file: tests/golden_tests/run_file/unbound_wrap.bend
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---
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[4m[1m[31mErrors:[0m
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[1mIn definition '[4mmain[0m[1m':[0m
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Reference to undefined function 'Maybe/wrap'
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