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xo-expression: + LocalEnv::lookup_local_binding()

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This commit is contained in:
Roland Conybeare 2024-07-03 16:37:06 -04:00
commit 8cf89f5eef
2 changed files with 23 additions and 5 deletions
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5
include/xo/expression/LocalEnv.hpp
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@ -35,6 +35,11 @@ namespace xo {
int n_arg() const { return argv_.size(); }
TypeDescr fn_arg(uint32_t i) const { return argv_[i]->valuetype(); }
/** report binding path for a formal parameter.
* Returns sentinel if @p vname doesn't appear in @ref argv_
**/
binding_path lookup_local_binding(const std::string & vname) const;
/** single-assign this environment's origin **/
void assign_origin(Lambda * p) {
assert(origin_ == nullptr);