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also remove clones for Body
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Folkert
parent
b421df2a28
commit
cd203d20a3
1 changed files with 88 additions and 87 deletions
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@ -864,19 +864,19 @@ fn pattern_to_vars_by_symbol(
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}
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}
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fn single_typed_can_def(
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fn single_can_def(
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loc_can_pattern: Loc<Pattern>,
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loc_can_expr: Loc<Expr>,
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expr_var: Variable,
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loc_annotation: Loc<crate::annotation::Annotation>,
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opt_loc_annotation: Option<Loc<crate::annotation::Annotation>>,
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pattern_vars: SendMap<Symbol, Variable>,
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) -> Def {
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let def_annotation = Annotation {
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let def_annotation = opt_loc_annotation.map(|loc_annotation| Annotation {
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signature: loc_annotation.value.typ,
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introduced_variables: loc_annotation.value.introduced_variables,
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aliases: loc_annotation.value.aliases,
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region: loc_annotation.region,
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};
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});
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Def {
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expr_var,
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@ -886,7 +886,7 @@ fn single_typed_can_def(
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value: loc_can_expr.value,
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},
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pattern_vars,
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annotation: Some(def_annotation),
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annotation: def_annotation,
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}
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}
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@ -1141,11 +1141,11 @@ fn canonicalize_pending_def<'a>(
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refs_by_symbol.insert(symbol, (region, refs));
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}
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let def = single_typed_can_def(
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let def = single_can_def(
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loc_can_pattern,
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loc_can_expr,
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expr_var,
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Loc::at(loc_ann.region, type_annotation),
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Some(Loc::at(loc_ann.region, type_annotation)),
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vars_by_symbol.clone(),
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);
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can_defs_by_symbol.insert(symbol, def);
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@ -1211,108 +1211,109 @@ fn canonicalize_pending_def<'a>(
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// reset the tailcallable_symbol
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env.tailcallable_symbol = outer_identifier;
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// see below: a closure needs a fresh References!
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let mut is_closure = false;
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// First, make sure we are actually assigning an identifier instead of (for example) a tag.
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//
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// If we're assigning (UserId userId) = ... then this is certainly not a closure declaration,
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// which also implies it's not a self tail call!
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//
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// Only defs of the form (foo = ...) can be closure declarations or self tail calls.
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if let (
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&ast::Pattern::Identifier(_name),
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&Pattern::Identifier(ref defined_symbol),
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&Closure(ClosureData {
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if let Loc {
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region,
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value: Pattern::Identifier(symbol),
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} = loc_can_pattern
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{
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if let &Closure(ClosureData {
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function_type,
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closure_type,
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closure_ext_var,
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return_type,
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name: ref symbol,
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name: ref closure_name,
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ref arguments,
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loc_body: ref body,
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ref captured_symbols,
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..
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}),
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) = (
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&loc_pattern.value,
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&loc_can_pattern.value,
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&loc_can_expr.value,
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) {
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is_closure = true;
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// Since everywhere in the code it'll be referred to by its defined name,
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// remove its generated name from the closure map. (We'll re-insert it later.)
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let references = env.closures.remove(symbol).unwrap_or_else(|| {
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panic!(
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"Tried to remove symbol {:?} from procedures, but it was not found: {:?}",
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symbol, env.closures
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)
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});
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// Re-insert the closure into the map, under its defined name.
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// closures don't have a name, and therefore pick a fresh symbol. But in this
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// case, the closure has a proper name (e.g. `foo` in `foo = \x y -> ...`
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// and we want to reference it by that name.
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env.closures.insert(*defined_symbol, references);
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// The closure is self tail recursive iff it tail calls itself (by defined name).
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let is_recursive = match can_output.tail_call {
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Some(ref symbol) if symbol == defined_symbol => Recursive::TailRecursive,
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_ => Recursive::NotRecursive,
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};
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// Recursion doesn't count as referencing. (If it did, all recursive functions
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// would result in circular def errors!)
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refs_by_symbol
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.entry(*defined_symbol)
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.and_modify(|(_, refs)| {
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refs.lookups = refs.lookups.without(defined_symbol);
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}) = &loc_can_expr.value
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{
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// Since everywhere in the code it'll be referred to by its defined name,
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// remove its generated name from the closure map. (We'll re-insert it later.)
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let references = env.closures.remove(closure_name).unwrap_or_else(|| {
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panic!(
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"Tried to remove symbol {:?} from procedures, but it was not found: {:?}",
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closure_name, env.closures
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)
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});
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loc_can_expr.value = Closure(ClosureData {
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function_type,
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closure_type,
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closure_ext_var,
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return_type,
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name: *defined_symbol,
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captured_symbols: captured_symbols.clone(),
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recursive: is_recursive,
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arguments: arguments.clone(),
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loc_body: body.clone(),
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});
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}
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// Re-insert the closure into the map, under its defined name.
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// closures don't have a name, and therefore pick a fresh symbol. But in this
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// case, the closure has a proper name (e.g. `foo` in `foo = \x y -> ...`
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// and we want to reference it by that name.
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env.closures.insert(symbol, references);
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// The closure is self tail recursive iff it tail calls itself (by defined name).
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let is_recursive = match can_output.tail_call {
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Some(tail_symbol) if tail_symbol == symbol => Recursive::TailRecursive,
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_ => Recursive::NotRecursive,
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};
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// Recursion doesn't count as referencing. (If it did, all recursive functions
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// would result in circular def errors!)
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refs_by_symbol.entry(symbol).and_modify(|(_, refs)| {
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refs.lookups = refs.lookups.without(&symbol);
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});
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loc_can_expr.value = Closure(ClosureData {
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function_type,
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closure_type,
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closure_ext_var,
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return_type,
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name: symbol,
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captured_symbols: captured_symbols.clone(),
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recursive: is_recursive,
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arguments: arguments.clone(),
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loc_body: body.clone(),
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});
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// Store the referenced locals in the refs_by_symbol map, so we can later figure out
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// which defined names reference each other.
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for (symbol, region) in bindings_from_patterns(std::iter::once(&loc_can_pattern)) {
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let refs =
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// Functions' references don't count in defs.
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// See 3d5a2560057d7f25813112dfa5309956c0f9e6a9 and its
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// parent commit for the bug this fixed!
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if is_closure {
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References::new()
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} else {
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can_output.references.clone()
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};
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let refs = References::new();
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refs_by_symbol.insert(symbol, (region, refs));
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} else {
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let refs = can_output.references.clone();
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refs_by_symbol.insert(symbol, (region, refs));
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}
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refs_by_symbol.insert(symbol, (region, refs));
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can_defs_by_symbol.insert(
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symbol,
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Def {
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expr_var,
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// TODO try to remove this .clone()!
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loc_pattern: loc_can_pattern.clone(),
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loc_expr: Loc {
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// TODO try to remove this .clone()!
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region: loc_can_expr.region,
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value: loc_can_expr.value.clone(),
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},
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pattern_vars: vars_by_symbol.clone(),
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annotation: None,
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},
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let def = single_can_def(
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loc_can_pattern,
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loc_can_expr,
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expr_var,
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None,
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vars_by_symbol.clone(),
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);
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can_defs_by_symbol.insert(symbol, def);
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} else {
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// Store the referenced locals in the refs_by_symbol map, so we can later figure out
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// which defined names reference each other.
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for (symbol, region) in bindings_from_patterns(std::iter::once(&loc_can_pattern)) {
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let refs = can_output.references.clone();
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refs_by_symbol.insert(symbol, (region, refs));
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can_defs_by_symbol.insert(
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symbol,
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Def {
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expr_var,
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// TODO try to remove this .clone()!
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loc_pattern: loc_can_pattern.clone(),
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loc_expr: Loc {
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// TODO try to remove this .clone()!
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region: loc_can_expr.region,
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value: loc_can_expr.value.clone(),
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},
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pattern_vars: vars_by_symbol.clone(),
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annotation: None,
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},
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);
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}
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}
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output.union(can_output);
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