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xo-expression: + Lambda::layer_var_map

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This commit is contained in:
Roland Conybeare 2024-07-03 15:10:34 -04:00
commit 89043b0d46
2 changed files with 56 additions and 38 deletions
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17
include/xo/expression/Lambda.hpp
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@ -9,6 +9,7 @@
#include "FunctionInterface.hpp"
#include "Variable.hpp"
#include "LocalEnv.hpp"
#include <map>
#include <vector>
#include <string>
//#include <cstdint>
@ -73,9 +74,7 @@ namespace xo {
return this;
}
virtual void attach_envs(ref::brw<Environment> p) override {
local_env_->assign_parent(p);
}
virtual void attach_envs(ref::brw<Environment> p) override;
virtual void display(std::ostream & os) const override;
@ -97,7 +96,7 @@ namespace xo {
* Goal is to unify variables that can use the same binding
* path to determine memory location at runtime.
**/
void regularize_layer_vars();
std::map<std::string, ref::rp<Variable>> regularize_layer_vars();
private:
/** lambda name. Initially supporting only form like
@ -118,6 +117,16 @@ namespace xo {
/** free variables for this lambda **/
std::set<std::string> free_var_set_;
/** map giving unique identity to each variable appearing in this layer.
* includes:
* - formal parameters
* - free variables in @ref body_
* excludes:
* - any variables appearing in nested lambdas
* (whether formals or free variables)
**/
std::map<std::string, ref::rp<Variable>> layer_var_map_;
/** established (once) by @ref attach_envs.
*
* @note data dependency on ancestor expressions that don't exist yet