From 92f868e356db56f04748c73bd0e89369e5ce6ff3 Mon Sep 17 00:00:00 2001
From: anutosh491 <andersonbhat491@gmail.com>
Date: Wed, 25 Oct 2023 23:41:45 +0530
Subject: [PATCH] Implementing symbolic get args method

---
 src/libasr/pass/intrinsic_function_registry.h | 47 +++++++++++++++++++
 src/lpython/semantics/python_attribute_eval.h | 15 ++++++
 2 files changed, 62 insertions(+)

diff --git a/src/libasr/pass/intrinsic_function_registry.h b/src/libasr/pass/intrinsic_function_registry.h
index 4cf8cf36b0..e9941c0a63 100644
--- a/src/libasr/pass/intrinsic_function_registry.h
+++ b/src/libasr/pass/intrinsic_function_registry.h
@@ -84,6 +84,7 @@ enum class IntrinsicScalarFunctions : int64_t {
     SymbolicMulQ,
     SymbolicPowQ,
     SymbolicLogQ,
+    SymbolicGetArguments,
     // ...
 };
 
@@ -150,6 +151,7 @@ inline std::string get_intrinsic_name(int x) {
         INTRINSIC_NAME_CASE(SymbolicMulQ)
         INTRINSIC_NAME_CASE(SymbolicPowQ)
         INTRINSIC_NAME_CASE(SymbolicLogQ)
+        INTRINSIC_NAME_CASE(SymbolicGetArguments)
         default : {
             throw LCompilersException("pickle: intrinsic_id not implemented");
         }
@@ -3114,6 +3116,46 @@ namespace SymbolicHasSymbolQ {
     }
 } // namespace SymbolicHasSymbolQ
 
+namespace SymbolicGetArguments {
+    static inline void verify_args(const ASR::IntrinsicScalarFunction_t& x,
+        diag::Diagnostics& diagnostics) {
+        ASRUtils::require_impl(x.n_args == 1, "Intrinsic function SymbolicGetArguments"
+            "accepts exactly 1 argument", x.base.base.loc, diagnostics);
+
+        ASR::ttype_t* input_type = ASRUtils::expr_type(x.m_args[0]);
+        ASRUtils::require_impl(ASR::is_a<ASR::SymbolicExpression_t>(*input_type),
+            "SymbolicGetArguments expects an argument of type SymbolicExpression",
+                x.base.base.loc, diagnostics);
+    }
+
+    static inline ASR::expr_t* eval_SymbolicGetArguments(Allocator &/*al*/,
+        const Location &/*loc*/, ASR::ttype_t *, Vec<ASR::expr_t*> &/*args*/) {
+        /*TODO*/
+        return nullptr;
+    }
+
+    static inline ASR::asr_t* create_SymbolicGetArguments(Allocator& al,
+        const Location& loc, Vec<ASR::expr_t*>& args,
+        const std::function<void (const std::string &, const Location &)> err) {
+
+        if (args.size() != 1) {
+            err("Intrinsic function SymbolicGetArguments accepts exactly 1 argument", loc);
+        }
+
+        ASR::ttype_t* argtype = ASRUtils::expr_type(args[0]);
+        if (!ASR::is_a<ASR::SymbolicExpression_t>(*argtype)) {
+            err("Arguments of SymbolicGetArguments function must be of type SymbolicExpression",
+                    args[0]->base.loc);
+        }
+
+        ASR::ttype_t *symbolic_type = ASRUtils::TYPE(ASR::make_SymbolicExpression_t(al, loc));
+        ASR::ttype_t *to_type = ASRUtils::TYPE(ASR::make_List_t(al, loc, symbolic_type));
+        return UnaryIntrinsicFunction::create_UnaryFunction(al, loc, args, eval_SymbolicGetArguments,
+            static_cast<int64_t>(IntrinsicScalarFunctions::SymbolicGetArguments),
+            0, to_type);
+    }
+} // namespace SymbolicGetArguments
+
 #define create_symbolic_query_macro(X)                                                    \
 namespace X {                                                                             \
     static inline void verify_args(const ASR::IntrinsicScalarFunction_t& x,               \
@@ -3320,6 +3362,8 @@ namespace IntrinsicScalarFunctionRegistry {
             {nullptr, &SymbolicPowQ::verify_args}},
         {static_cast<int64_t>(IntrinsicScalarFunctions::SymbolicLogQ),
             {nullptr, &SymbolicLogQ::verify_args}},
+        {static_cast<int64_t>(IntrinsicScalarFunctions::SymbolicGetArguments),
+            {nullptr, &SymbolicGetArguments::verify_args}},
     };
 
     static const std::map<int64_t, std::string>& intrinsic_function_id_to_name = {
@@ -3434,6 +3478,8 @@ namespace IntrinsicScalarFunctionRegistry {
             "SymbolicPowQ"},
         {static_cast<int64_t>(IntrinsicScalarFunctions::SymbolicLogQ),
             "SymbolicLogQ"},
+        {static_cast<int64_t>(IntrinsicScalarFunctions::SymbolicGetArguments),
+            "SymbolicGetArguments"},
     };
 
 
@@ -3494,6 +3540,7 @@ namespace IntrinsicScalarFunctionRegistry {
                 {"MulQ", {&SymbolicMulQ::create_SymbolicMulQ, &SymbolicMulQ::eval_SymbolicMulQ}},
                 {"PowQ", {&SymbolicPowQ::create_SymbolicPowQ, &SymbolicPowQ::eval_SymbolicPowQ}},
                 {"LogQ", {&SymbolicLogQ::create_SymbolicLogQ, &SymbolicLogQ::eval_SymbolicLogQ}},
+                {"GetArguments", {&SymbolicGetArguments::create_SymbolicGetArguments, &SymbolicGetArguments::eval_SymbolicGetArguments}},
     };
 
     static inline bool is_intrinsic_function(const std::string& name) {
diff --git a/src/lpython/semantics/python_attribute_eval.h b/src/lpython/semantics/python_attribute_eval.h
index 2f70c308e8..978fd9e5c1 100644
--- a/src/lpython/semantics/python_attribute_eval.h
+++ b/src/lpython/semantics/python_attribute_eval.h
@@ -47,6 +47,7 @@ struct AttributeHandler {
             {"diff", &eval_symbolic_diff},
             {"expand", &eval_symbolic_expand},
             {"has", &eval_symbolic_has_symbol},
+            {"args", &eval_symbolic_get_arguments}
         };
     }
 
@@ -513,6 +514,20 @@ struct AttributeHandler {
                                 { throw SemanticError(msg, loc); });
     }
 
+    static ASR::asr_t* eval_symbolic_get_arguments(ASR::expr_t *s, Allocator &al, const Location &loc,
+            Vec<ASR::expr_t*> &args, diag::Diagnostics &/*diag*/) {
+        Vec<ASR::expr_t*> args_with_list;
+        args_with_list.reserve(al, args.size() + 1);
+        args_with_list.push_back(al, s);
+        for(size_t i = 0; i < args.size(); i++) {
+            args_with_list.push_back(al, args[i]);
+        }
+        ASRUtils::create_intrinsic_function create_function =
+            ASRUtils::IntrinsicScalarFunctionRegistry::get_create_function("GetArguments");
+        return create_function(al, loc, args_with_list, [&](const std::string &msg, const Location &loc)
+                                { throw SemanticError(msg, loc); });
+    }
+
 }; // AttributeHandler
 
 } // namespace LCompilers::LPython