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captures for "when" statements

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update Triggers to IntrusivePtr's and simpler AST traversal
introduce IDSet type, migrate associated "ID*" types to "const ID*"
This commit is contained in:
Vern Paxson 2022-01-07 14:50:35 -08:00
parent fa142438fe
commit f895008c34
24 changed files with 648 additions and 202 deletions
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19
src/Var.cc
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@ -680,6 +680,7 @@ class OuterIDBindingFinder : public TraversalCallback
public:
OuterIDBindingFinder(ScopePtr s) { scopes.emplace_back(s); }
TraversalCode PreStmt(const Stmt*) override;
TraversalCode PreExpr(const Expr*) override;
TraversalCode PostExpr(const Expr*) override;
@ -687,6 +688,24 @@ public:
std::unordered_set<ID*> outer_id_references;
};
TraversalCode OuterIDBindingFinder::PreStmt(const Stmt* stmt)
{
if ( stmt->Tag() != STMT_WHEN )
return TC_CONTINUE;
auto ws = static_cast<const WhenStmt*>(stmt);
auto lambda = ws->Info()->Lambda();
if ( ! lambda )
// Old-style semantics.
return TC_CONTINUE;
// The semantics of identifiers for the "when" statement are those
// of the lambda it's transformed into.
lambda->Traverse(this);
return TC_ABORTSTMT;
}
TraversalCode OuterIDBindingFinder::PreExpr(const Expr* expr)
{
if ( expr->Tag() == EXPR_LAMBDA )