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python_ast_to_asr.cpp
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6236 lines (5929 loc) · 306 KB
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#include <fstream>
#include <iostream>
#include <map>
#include <set>
#include <memory>
#include <string>
#include <cmath>
#include <vector>
#include <bitset>
#include <complex>
#include <sstream>
#include <iterator>
#include <libasr/asr.h>
#include <libasr/asr_utils.h>
#include <libasr/asr_verify.h>
#include <libasr/config.h>
#include <libasr/string_utils.h>
#include <libasr/utils.h>
#include <libasr/pass/global_stmts_program.h>
#include <libasr/pass/instantiate_template.h>
#include <libasr/modfile.h>
#include <lpython/python_ast.h>
#include <lpython/semantics/python_ast_to_asr.h>
#include <lpython/utils.h>
#include <lpython/semantics/semantic_exception.h>
#include <lpython/python_serialization.h>
#include <lpython/semantics/python_comptime_eval.h>
#include <lpython/semantics/python_attribute_eval.h>
#include <lpython/semantics/python_intrinsic_eval.h>
#include <lpython/parser/parser.h>
#include <libasr/serialization.h>
namespace LCompilers::LPython {
namespace CastingUtil {
// Data structure which contains priorities for
// intrinsic types defined in ASR
const std::map<ASR::ttypeType, int>& type2weight = {
{ASR::ttypeType::Complex, 4},
{ASR::ttypeType::Real, 3},
{ASR::ttypeType::Integer, 2},
{ASR::ttypeType::Logical, 1}
};
// Data structure which contains casting rules for non-equal
// intrinsic types defined in ASR
const std::map<std::pair<ASR::ttypeType, ASR::ttypeType>, ASR::cast_kindType>& type_rules = {
{std::make_pair(ASR::ttypeType::Complex, ASR::ttypeType::Real), ASR::cast_kindType::ComplexToReal},
{std::make_pair(ASR::ttypeType::Complex, ASR::ttypeType::Logical), ASR::cast_kindType::ComplexToLogical},
{std::make_pair(ASR::ttypeType::Real, ASR::ttypeType::Complex), ASR::cast_kindType::RealToComplex},
{std::make_pair(ASR::ttypeType::Real, ASR::ttypeType::Integer), ASR::cast_kindType::RealToInteger},
{std::make_pair(ASR::ttypeType::Real, ASR::ttypeType::Logical), ASR::cast_kindType::RealToLogical},
{std::make_pair(ASR::ttypeType::Integer, ASR::ttypeType::Complex), ASR::cast_kindType::IntegerToComplex},
{std::make_pair(ASR::ttypeType::Integer, ASR::ttypeType::Real), ASR::cast_kindType::IntegerToReal},
{std::make_pair(ASR::ttypeType::Integer, ASR::ttypeType::Logical), ASR::cast_kindType::IntegerToLogical},
{std::make_pair(ASR::ttypeType::Logical, ASR::ttypeType::Real), ASR::cast_kindType::LogicalToReal},
{std::make_pair(ASR::ttypeType::Logical, ASR::ttypeType::Integer), ASR::cast_kindType::LogicalToInteger},
};
// Data structure which contains casting rules for equal intrinsic
// types but with different kinds.
const std::map<ASR::ttypeType, ASR::cast_kindType>& kind_rules = {
{ASR::ttypeType::Complex, ASR::cast_kindType::ComplexToComplex},
{ASR::ttypeType::Real, ASR::cast_kindType::RealToReal},
{ASR::ttypeType::Integer, ASR::cast_kindType::IntegerToInteger}
};
int get_type_priority(ASR::ttypeType type) {
if( type2weight.find(type) == type2weight.end() ) {
return -1;
}
return type2weight.at(type);
}
int get_src_dest(ASR::expr_t* left_expr, ASR::expr_t* right_expr,
ASR::expr_t*& src_expr, ASR::expr_t*& dest_expr,
ASR::ttype_t*& src_type, ASR::ttype_t*& dest_type,
bool is_assign) {
ASR::ttype_t* left_type = ASRUtils::expr_type(left_expr);
ASR::ttype_t* right_type = ASRUtils::expr_type(right_expr);
if( ASR::is_a<ASR::Const_t>(*left_type) ) {
left_type = ASRUtils::get_contained_type(left_type);
}
if( ASR::is_a<ASR::Const_t>(*right_type) ) {
right_type = ASRUtils::get_contained_type(right_type);
}
left_type = ASRUtils::type_get_past_pointer(left_type);
right_type = ASRUtils::type_get_past_pointer(right_type);
if( ASRUtils::check_equal_type(left_type, right_type) ||
ASRUtils::is_character(*left_type) || ASRUtils::is_character(*right_type) ) {
return 2;
}
if( is_assign ) {
if( ASRUtils::is_real(*left_type) && ASRUtils::is_integer(*right_type)) {
throw SemanticError("Assigning integer to float is not supported",
right_expr->base.loc);
}
if ( ASRUtils::is_complex(*left_type) && !ASRUtils::is_complex(*right_type)) {
throw SemanticError("Assigning non-complex to complex is not supported",
right_expr->base.loc);
}
dest_expr = left_expr, dest_type = left_type;
src_expr = right_expr, src_type = right_type;
return 1;
}
int casted_expr_signal = 2;
ASR::ttypeType left_Type = left_type->type, right_Type = right_type->type;
int left_kind = ASRUtils::extract_kind_from_ttype_t(left_type);
int right_kind = ASRUtils::extract_kind_from_ttype_t(right_type);
int left_priority = get_type_priority(left_Type);
int right_priority = get_type_priority(right_Type);
if( left_priority > right_priority ) {
src_expr = right_expr, src_type = right_type;
dest_expr = left_expr, dest_type = left_type;
casted_expr_signal = 1;
} else if( left_priority < right_priority ) {
src_expr = left_expr, src_type = left_type;
dest_expr = right_expr, dest_type = right_type;
casted_expr_signal = 0;
} else {
if( left_kind > right_kind ) {
src_expr = right_expr, src_type = right_type;
dest_expr = left_expr, dest_type = left_type;
casted_expr_signal = 1;
} else if( left_kind < right_kind ) {
src_expr = left_expr, src_type = left_type;
dest_expr = right_expr, dest_type = right_type;
casted_expr_signal = 0;
} else {
return 2;
}
}
return casted_expr_signal;
}
ASR::expr_t* perform_casting(ASR::expr_t* expr, ASR::ttype_t* src,
ASR::ttype_t* dest, Allocator& al,
const Location& loc) {
ASR::ttypeType src_type = src->type;
ASR::ttypeType dest_type = dest->type;
ASR::cast_kindType cast_kind;
if( src_type == dest_type ) {
if( kind_rules.find(src_type) == kind_rules.end() ) {
return expr;
}
cast_kind = kind_rules.at(src_type);
} else {
std::pair<ASR::ttypeType, ASR::ttypeType> cast_key = std::make_pair(src_type, dest_type);
if( type_rules.find(cast_key) == type_rules.end() ) {
return expr;
}
cast_kind = type_rules.at(cast_key);
}
// TODO: Fix loc
return ASRUtils::EXPR(ASRUtils::make_Cast_t_value(al, loc, expr,
cast_kind, dest));
}
}
int save_pyc_files(const ASR::TranslationUnit_t &u,
std::string infile) {
diag::Diagnostics diagnostics;
LCOMPILERS_ASSERT(asr_verify(u, true, diagnostics));
std::string modfile_binary = save_pycfile(u);
while( infile.back() != '.' ) {
infile.pop_back();
}
std::string modfile = infile + "pyc";
{
std::ofstream out;
out.open(modfile, std::ofstream::out | std::ofstream::binary);
out << modfile_binary;
}
return 0;
}
// Does a CPython style lookup for a module:
// * First the current directory (this is incorrect, we need to do it relative to the current file)
// * Then the LPython runtime directory
Result<std::string> get_full_path(const std::string &filename,
const std::string &runtime_library_dir, std::string& input,
bool <ypes, bool& enum_py) {
ltypes = false;
enum_py = false;
std::string file_path;
if( *(runtime_library_dir.rbegin()) == '/' ) {
file_path = runtime_library_dir + filename;
} else {
file_path = runtime_library_dir + "/" + filename;
}
bool status = read_file(file_path, input);
if (status) {
return file_path;
} else {
status = read_file(file_path, input);
if (status) {
return file_path;
} else {
// If this is `ltypes`, do a special lookup
if (filename == "ltypes.py") {
file_path = runtime_library_dir + "/ltypes/" + filename;
status = read_file(file_path, input);
if (status) {
ltypes = true;
return file_path;
} else {
return Error();
}
} else if (startswith(filename, "numpy.py")) {
file_path = runtime_library_dir + "/lpython_intrinsic_" + filename;
status = read_file(file_path, input);
if (status) {
return file_path;
} else {
return Error();
}
} else if (startswith(filename, "enum.py")) {
enum_py = true;
return Error();
} else {
return Error();
}
}
}
}
bool set_module_path(std::string infile0, std::vector<std::string> &rl_path,
std::string& infile, std::string& path_used, std::string& input,
bool& ltypes, bool& enum_py) {
for (auto path: rl_path) {
Result<std::string> rinfile = get_full_path(infile0, path, input, ltypes, enum_py);
if (rinfile.ok) {
infile = rinfile.result;
path_used = path;
return true;
}
}
return false;
}
ASR::TranslationUnit_t* compile_module_till_asr(Allocator& al,
std::vector<std::string> &rl_path, std::string infile,
const Location &loc, diag::Diagnostics &diagnostics, LocationManager &lm,
const std::function<void (const std::string &, const Location &)> err,
bool allow_implicit_casting) {
{
LocationManager::FileLocations fl;
fl.in_filename = infile;
lm.files.push_back(fl);
std::string input = read_file(infile);
lm.file_ends.push_back(lm.file_ends.back() + input.size());
lm.init_simple(input);
}
Result<AST::ast_t*> r = parse_python_file(al, rl_path[0], infile,
diagnostics, lm.file_ends.end()[-2], false);
if (!r.ok) {
err("The file '" + infile + "' failed to parse", loc);
}
LCompilers::LPython::AST::ast_t* ast = r.result;
// Convert the module from AST to ASR
CompilerOptions compiler_options;
compiler_options.disable_main = true;
compiler_options.symtab_only = false;
Result<ASR::TranslationUnit_t*> r2 = python_ast_to_asr(al, lm, *ast,
diagnostics, compiler_options, false, infile, allow_implicit_casting);
// TODO: Uncomment once a check is added for ensuring
// that module.py file hasn't changed between
// builds.
// save_pyc_files(*r2.result, infile + "c");
if (!r2.ok) {
LCOMPILERS_ASSERT(diagnostics.has_error())
return nullptr; // Error
}
return r2.result;
}
void fill_module_dependencies(SymbolTable* symtab, std::set<std::string>& mod_deps) {
if( symtab == nullptr ) {
return ;
}
for( auto& itr: symtab->get_scope() ) {
if( ASR::is_a<ASR::ExternalSymbol_t>(*itr.second) ) {
ASR::ExternalSymbol_t* ext_sym = ASR::down_cast<ASR::ExternalSymbol_t>(itr.second);
mod_deps.insert(std::string(ext_sym->m_module_name));
} else {
SymbolTable* sym_symtab = ASRUtils::symbol_symtab(itr.second);
fill_module_dependencies(sym_symtab, mod_deps);
}
}
}
ASR::Module_t* load_module(Allocator &al, SymbolTable *symtab,
const std::string &module_name,
const Location &loc, diag::Diagnostics &diagnostics,
LocationManager &lm, bool intrinsic,
std::vector<std::string> &rl_path,
bool <ypes, bool& enum_py, bool& copy,
const std::function<void (const std::string &, const Location &)> err,
bool allow_implicit_casting) {
ltypes = false;
enum_py = false;
copy = false;
if( module_name == "copy" ) {
copy = true;
return nullptr;
}
LCOMPILERS_ASSERT(symtab);
if (symtab->get_scope().find(module_name) != symtab->get_scope().end()) {
ASR::symbol_t *m = symtab->get_symbol(module_name);
if (ASR::is_a<ASR::Module_t>(*m)) {
return ASR::down_cast<ASR::Module_t>(m);
} else {
err("The symbol '" + module_name + "' is not a module", loc);
}
}
LCOMPILERS_ASSERT(symtab->parent == nullptr);
// Parse the module `module_name`.py to AST
std::string infile0 = module_name + ".py";
std::string infile0c = infile0 + "c";
std::string path_used = "", infile;
bool compile_module = true;
ASR::TranslationUnit_t* mod1 = nullptr;
std::string input;
std::string module_dir_name = "";
bool found = set_module_path(infile0c, rl_path, infile,
path_used, input, ltypes, enum_py);
if( !found ) {
input.clear();
found = set_module_path(infile0, rl_path, infile,
path_used, input, ltypes, enum_py);
} else {
mod1 = load_pycfile(al, input, false);
fix_external_symbols(*mod1, *ASRUtils::get_tu_symtab(symtab));
diag::Diagnostics diagnostics;
LCOMPILERS_ASSERT(asr_verify(*mod1, true, diagnostics));
compile_module = false;
}
if( enum_py ) {
return nullptr;
}
if (!found) {
err("Could not find the module '" + module_name + "'. If an import path "
"is available, please use the `-I` option to specify it", loc);
}
if (ltypes) return nullptr;
if( compile_module ) {
diagnostics.add(diag::Diagnostic(
"The module '" + module_name + "' located in " + infile +" cannot be loaded",
diag::Level::Warning, diag::Stage::Semantic, {
diag::Label("imported here", {loc})
})
);
mod1 = compile_module_till_asr(al, rl_path, infile, loc, diagnostics,
lm, err, allow_implicit_casting);
if (mod1 == nullptr) {
throw SemanticAbort();
} else {
diagnostics.diagnostics.pop_back();
}
}
// insert into `symtab`
std::vector<std::pair<std::string, ASR::Module_t*>> children_modules;
if (module_name == "__init__") {
// remove `__init__.py`
module_dir_name = infile.substr(0, infile.find_last_of('/'));
// assign module directory name
module_dir_name = module_dir_name.substr(module_dir_name.find_last_of('/') + 1);
ASRUtils::extract_module_python(*mod1, children_modules, module_dir_name);
} else {
ASRUtils::extract_module_python(*mod1, children_modules, module_name);
}
ASR::Module_t* mod2 = nullptr;
for( auto& a: children_modules ) {
std::string a_name = a.first;
ASR::Module_t* a_mod = a.second;
if( a_name == module_name ) {
a_mod->m_name = s2c(al, module_name);
a_mod->m_intrinsic = intrinsic;
mod2 = a_mod;
} else if (a_name == module_dir_name) {
a_mod->m_name = s2c(al, module_dir_name);
a_mod->m_intrinsic = intrinsic;
mod2 = a_mod;
}
symtab->add_symbol(a_name, (ASR::symbol_t*)a_mod);
a_mod->m_symtab->parent = symtab;
}
if (intrinsic) {
// TODO: I think we should just store intrinsic once, in the module
// itself
// Mark each function as intrinsic also
for (auto &item : mod2->m_symtab->get_scope()) {
if (ASR::is_a<ASR::Function_t>(*item.second)) {
ASR::Function_t *s = ASR::down_cast<ASR::Function_t>(item.second);
if (ASRUtils::get_FunctionType(s)->m_abi == ASR::abiType::Source) {
ASRUtils::get_FunctionType(s)->m_abi = ASR::abiType::Intrinsic;
}
if (s->n_body == 0) {
std::string name = s->m_name;
if (name == "ubound" || name == "lbound") {
ASRUtils::get_FunctionType(s)->m_deftype = ASR::deftypeType::Interface;
}
}
}
}
}
// and return it
return mod2;
}
ASR::symbol_t* import_from_module(Allocator &al, ASR::Module_t *m, SymbolTable *current_scope,
std::string /*mname*/, std::string cur_sym_name, std::string& new_sym_name,
const Location &loc, bool skip_current_scope_check=false) {
new_sym_name = ASRUtils::get_mangled_name(m, new_sym_name);
ASR::symbol_t *t = m->m_symtab->resolve_symbol(cur_sym_name);
if (!t) {
throw SemanticError("The symbol '" + cur_sym_name + "' not found in the module '" + std::string(m->m_name) + "'",
loc);
}
if (!skip_current_scope_check &&
current_scope->get_scope().find(new_sym_name) != current_scope->get_scope().end()) {
throw SemanticError(new_sym_name + " already defined", loc);
}
if (ASR::is_a<ASR::Function_t>(*t)) {
ASR::Function_t *mfn = ASR::down_cast<ASR::Function_t>(t);
// `mfn` is the Function in a module. Now we construct
// an ExternalSymbol that points to it.
Str name;
name.from_str(al, new_sym_name);
char *cname = name.c_str(al);
ASR::asr_t *fn = ASR::make_ExternalSymbol_t(
al, mfn->base.base.loc,
/* a_symtab */ current_scope,
/* a_name */ cname,
(ASR::symbol_t*)mfn,
m->m_name, nullptr, 0, mfn->m_name,
ASR::accessType::Public
);
return ASR::down_cast<ASR::symbol_t>(fn);
} else if (ASR::is_a<ASR::Variable_t>(*t)) {
ASR::Variable_t *mv = ASR::down_cast<ASR::Variable_t>(t);
// `mv` is the Variable in a module. Now we construct
// an ExternalSymbol that points to it.
Str name;
name.from_str(al, new_sym_name);
char *cname = name.c_str(al);
ASR::asr_t *v = ASR::make_ExternalSymbol_t(
al, mv->base.base.loc,
/* a_symtab */ current_scope,
/* a_name */ cname,
(ASR::symbol_t*)mv,
m->m_name, nullptr, 0, mv->m_name,
ASR::accessType::Public
);
return ASR::down_cast<ASR::symbol_t>(v);
} else if (ASR::is_a<ASR::GenericProcedure_t>(*t)) {
ASR::GenericProcedure_t *gt = ASR::down_cast<ASR::GenericProcedure_t>(t);
Str name;
name.from_str(al, new_sym_name);
char *cname = name.c_str(al);
ASR::asr_t *v = ASR::make_ExternalSymbol_t(
al, gt->base.base.loc,
/* a_symtab */ current_scope,
/* a_name */ cname,
(ASR::symbol_t*)gt,
m->m_name, nullptr, 0, gt->m_name,
ASR::accessType::Public
);
return ASR::down_cast<ASR::symbol_t>(v);
} else if (ASR::is_a<ASR::ExternalSymbol_t>(*t)) {
ASR::ExternalSymbol_t *es = ASR::down_cast<ASR::ExternalSymbol_t>(t);
SymbolTable *symtab = current_scope;
// while (symtab->parent != nullptr) symtab = symtab->parent;
ASR::symbol_t *sym = symtab->resolve_symbol(es->m_module_name);
ASR::Module_t *m = ASR::down_cast<ASR::Module_t>(sym);
return import_from_module(al, m, symtab, es->m_module_name,
cur_sym_name, new_sym_name, loc);
} else if (ASR::is_a<ASR::Module_t>(*t)) {
ASR::Module_t* mt = ASR::down_cast<ASR::Module_t>(t);
std::string mangled_cur_sym_name = ASRUtils::get_mangled_name(mt, new_sym_name);
if( cur_sym_name == mangled_cur_sym_name ) {
throw SemanticError("Importing modules isn't supported yet.", loc);
}
return import_from_module(al, mt, current_scope, std::string(mt->m_name),
cur_sym_name, new_sym_name, loc);
} else {
throw SemanticError("Only Subroutines, Functions, Variables and "
"ExternalSymbol are currently supported in 'import'", loc);
}
LCOMPILERS_ASSERT(false);
return nullptr;
}
template <class Struct>
class CommonVisitor : public AST::BaseVisitor<Struct> {
public:
diag::Diagnostics &diag;
ASR::asr_t *tmp;
/*
If `tmp` is not null, then `tmp_vec` is ignored and `tmp` is used as the only result (statement or
expression). If `tmp` is null, then `tmp_vec` is used to return any number of statements:
0 (no statement returned), 1 (redundant, one should use `tmp` for that), 2, 3, ... etc.
*/
std::vector<ASR::asr_t *> tmp_vec;
Allocator &al;
LocationManager &lm;
SymbolTable *current_scope;
// The current_module contains the current module that is being visited;
// this is used to append to the module dependencies if needed
ASR::Module_t *current_module = nullptr;
Vec<char *> current_module_dependencies;
// True for the main module, false for every other one
// The main module is stored directly in TranslationUnit, other modules are Modules
bool main_module;
PythonIntrinsicProcedures intrinsic_procedures;
ProceduresDatabase procedures_db;
AttributeHandler attr_handler;
IntrinsicNodeHandler intrinsic_node_handler;
std::map<int, ASR::symbol_t*> &ast_overload;
std::string parent_dir;
std::string import_path;
Vec<ASR::stmt_t*> *current_body;
ASR::ttype_t* ann_assign_target_type;
AST::expr_t* assign_ast_target;
bool is_c_p_pointer_call;
std::map<std::string, int> generic_func_nums;
std::map<std::string, std::map<std::string, ASR::ttype_t*>> generic_func_subs;
std::vector<ASR::symbol_t*> rt_vec;
std::set<std::string> dependencies;
bool allow_implicit_casting;
CommonVisitor(Allocator &al, LocationManager &lm, SymbolTable *symbol_table,
diag::Diagnostics &diagnostics, bool main_module,
std::map<int, ASR::symbol_t*> &ast_overload, std::string parent_dir,
std::string import_path, bool allow_implicit_casting_)
: diag{diagnostics}, al{al}, lm{lm}, current_scope{symbol_table}, main_module{main_module},
ast_overload{ast_overload}, parent_dir{parent_dir}, import_path{import_path},
current_body{nullptr}, ann_assign_target_type{nullptr}, assign_ast_target{nullptr},
is_c_p_pointer_call{false}, allow_implicit_casting{allow_implicit_casting_} {
current_module_dependencies.reserve(al, 4);
}
ASR::asr_t* resolve_variable(const Location &loc, const std::string &var_name) {
SymbolTable *scope = current_scope;
ASR::symbol_t *v = scope->resolve_symbol(var_name);
if (!v) {
diag.semantic_error_label("Variable '" + var_name
+ "' is not declared", {loc},
"'" + var_name + "' is undeclared");
throw SemanticAbort();
}
return ASR::make_Var_t(al, loc, v);
}
ASR::symbol_t* resolve_intrinsic_function(const Location &loc, const std::string &remote_sym) {
LCOMPILERS_ASSERT(intrinsic_procedures.is_intrinsic(remote_sym))
std::string module_name = intrinsic_procedures.get_module(remote_sym, loc);
SymbolTable *tu_symtab = ASRUtils::get_tu_symtab(current_scope);
std::string rl_path = get_runtime_library_dir();
std::vector<std::string> paths = {rl_path, parent_dir};
bool ltypes, enum_py, copy;
ASR::Module_t *m = load_module(al, tu_symtab, module_name,
loc, diag, lm, true, paths,
ltypes, enum_py, copy,
[&](const std::string &msg, const Location &loc) { throw SemanticError(msg, loc); },
allow_implicit_casting);
LCOMPILERS_ASSERT(!ltypes && !enum_py)
ASR::symbol_t *t = m->m_symtab->resolve_symbol(remote_sym);
if (!t) {
throw SemanticError("The symbol '" + remote_sym
+ "' not found in the module '" + module_name + "'",
loc);
} else if (! (ASR::is_a<ASR::GenericProcedure_t>(*t)
|| ASR::is_a<ASR::Function_t>(*t)
)) {
throw SemanticError("The symbol '" + remote_sym
+ "' found in the module '" + module_name + "', "
+ "but it is not a function, subroutine or a generic procedure.",
loc);
}
char *fn_name = ASRUtils::symbol_name(t);
ASR::asr_t *fn = ASR::make_ExternalSymbol_t(
al, t->base.loc,
/* a_symtab */ current_scope,
/* a_name */ fn_name,
t,
m->m_name, nullptr, 0, fn_name,
ASR::accessType::Private
);
std::string sym = fn_name;
current_scope->add_symbol(sym, ASR::down_cast<ASR::symbol_t>(fn));
ASR::symbol_t *v = ASR::down_cast<ASR::symbol_t>(fn);
// Now we need to add the module `m` with the intrinsic function
// into the current module dependencies
if (current_module) {
// We are in body visitor, the module is already constructed
// and available as current_module.
// Add the module `m` to current module dependencies
Vec<char*> vec;
vec.from_pointer_n_copy(al, current_module->m_dependencies,
current_module->n_dependencies);
if (!present(vec, m->m_name)) {
vec.push_back(al, m->m_name);
current_module->m_dependencies = vec.p;
current_module->n_dependencies = vec.size();
}
} else {
// We are in the symtab visitor or body visitor and we are
// constructing a module, so current_module is not available yet
// (the current_module_dependencies is not used in body visitor)
if (!present(current_module_dependencies, m->m_name)) {
current_module_dependencies.push_back(al, m->m_name);
}
}
return v;
}
void handle_attribute(ASR::expr_t *s, std::string attr_name,
const Location &loc, Vec<ASR::expr_t*> &args) {
tmp = attr_handler.get_attribute(s, attr_name, al, loc, args, diag);
return;
}
void fill_expr_in_ttype_t(std::vector<ASR::expr_t*>& exprs, ASR::dimension_t* dims, size_t n_dims) {
for( size_t i = 0; i < n_dims; i++ ) {
exprs.push_back(dims[i].m_start);
exprs.push_back(dims[i].m_length);
}
}
void fix_exprs_ttype_t(std::vector<ASR::expr_t*>& exprs,
Vec<ASR::call_arg_t>& orig_args,
ASR::Function_t* orig_func=nullptr) {
ASRUtils::ExprStmtDuplicator expr_duplicator(al);
expr_duplicator.allow_procedure_calls = true;
ASRUtils::ReplaceArgVisitor arg_replacer(al, current_scope, orig_func,
orig_args, dependencies);
for( size_t i = 0; i < exprs.size(); i++ ) {
ASR::expr_t* expri = exprs[i];
if (expri) {
expr_duplicator.success = true;
ASR::expr_t* expri_copy = expr_duplicator.duplicate_expr(expri);
LCOMPILERS_ASSERT(expr_duplicator.success);
arg_replacer.current_expr = &expri_copy;
arg_replacer.replace_expr(expri_copy);
exprs[i] = expri_copy;
}
}
}
ASR::ttype_t* handle_return_type(ASR::ttype_t *return_type, const Location &loc,
Vec<ASR::call_arg_t>& args,
ASR::Function_t* f=nullptr) {
// Rebuild the return type if needed and make FunctionCalls use ExternalSymbol
std::vector<ASR::expr_t*> func_calls;
switch( return_type->type ) {
case ASR::ttypeType::Character: {
ASR::Character_t *t = ASR::down_cast<ASR::Character_t>(return_type);
func_calls.push_back(t->m_len_expr);
fill_expr_in_ttype_t(func_calls, t->m_dims, t->n_dims);
fix_exprs_ttype_t(func_calls, args, f);
Vec<ASR::dimension_t> new_dims;
new_dims.reserve(al, t->n_dims);
for( size_t i = 1; i < func_calls.size(); i += 2 ) {
ASR::dimension_t new_dim;
new_dim.loc = func_calls[i]->base.loc;
new_dim.m_start = func_calls[i];
new_dim.m_length = func_calls[i + 1];
new_dims.push_back(al, new_dim);
}
int64_t a_len = t->m_len;
if( func_calls[0] ) {
a_len = ASRUtils::extract_len<SemanticError>(func_calls[0], loc);
}
return ASRUtils::TYPE(ASR::make_Character_t(al, loc, t->m_kind, a_len, func_calls[0], new_dims.p, new_dims.size()));
}
case ASR::ttypeType::Integer: {
ASR::Integer_t *t = ASR::down_cast<ASR::Integer_t>(return_type);
fill_expr_in_ttype_t(func_calls, t->m_dims, t->n_dims);
fix_exprs_ttype_t(func_calls, args, f);
Vec<ASR::dimension_t> new_dims;
new_dims.reserve(al, t->n_dims);
for( size_t i = 0; i < func_calls.size(); i += 2 ) {
ASR::dimension_t new_dim;
new_dim.loc = func_calls[i]->base.loc;
new_dim.m_start = func_calls[i];
new_dim.m_length = func_calls[i + 1];
new_dims.push_back(al, new_dim);
}
return ASRUtils::TYPE(ASR::make_Integer_t(al, loc, t->m_kind, new_dims.p, new_dims.size()));
}
case ASR::ttypeType::Real: {
ASR::Real_t *t = ASR::down_cast<ASR::Real_t>(return_type);
fill_expr_in_ttype_t(func_calls, t->m_dims, t->n_dims);
fix_exprs_ttype_t(func_calls, args, f);
Vec<ASR::dimension_t> new_dims;
new_dims.reserve(al, t->n_dims);
for( size_t i = 0; i < func_calls.size(); i += 2 ) {
ASR::dimension_t new_dim;
new_dim.loc = func_calls[i]->base.loc;
new_dim.m_start = func_calls[i];
new_dim.m_length = func_calls[i + 1];
new_dims.push_back(al, new_dim);
}
return ASRUtils::TYPE(ASR::make_Real_t(al, loc, t->m_kind, new_dims.p, new_dims.size()));
break;
}
default: {
return return_type;
}
}
return nullptr;
}
void visit_expr_list(AST::expr_t** exprs, size_t n,
Vec<ASR::expr_t*> exprs_vec) {
LCOMPILERS_ASSERT(exprs_vec.reserve_called);
for( size_t i = 0; i < n; i++ ) {
this->visit_expr(*exprs[i]);
exprs_vec.push_back(al, ASRUtils::EXPR(tmp));
}
}
void visit_expr_list(AST::expr_t** exprs, size_t n,
Vec<ASR::call_arg_t>& call_args_vec) {
LCOMPILERS_ASSERT(call_args_vec.reserve_called);
for( size_t i = 0; i < n; i++ ) {
this->visit_expr(*exprs[i]);
ASR::expr_t* expr = nullptr;
ASR::call_arg_t arg;
if (tmp) {
expr = ASRUtils::EXPR(tmp);
arg.loc = expr->base.loc;
}
arg.m_value = expr;
call_args_vec.push_back(al, arg);
}
}
int64_t find_argument_position_from_name(ASR::Function_t* orig_func, std::string arg_name,
const Location& call_loc, bool raise_error) {
int64_t arg_position = -1;
for( size_t i = 0; i < orig_func->n_args; i++ ) {
ASR::Var_t* arg_Var = ASR::down_cast<ASR::Var_t>(orig_func->m_args[i]);
std::string original_arg_name = ASRUtils::symbol_name(arg_Var->m_v);
if( original_arg_name == arg_name ) {
return i;
}
}
for ( size_t i = 0; i < ASRUtils::get_FunctionType(orig_func)->n_restrictions; i++ ) {
ASR::symbol_t* rt = ASRUtils::get_FunctionType(orig_func)->m_restrictions[i];
std::string rt_name = ASRUtils::symbol_name(rt);
if ( rt_name == arg_name ) {
return -2;
}
}
if( raise_error && arg_position == -1 ) {
throw SemanticError("Function " + std::string(orig_func->m_name) +
" doesn't have an argument named '" + arg_name + "'",
call_loc);
}
return arg_position;
}
bool visit_expr_list(AST::expr_t** pos_args, size_t n_pos_args,
AST::keyword_t* kwargs, size_t n_kwargs,
Vec<ASR::call_arg_t>& call_args_vec,
std::map<std::string, ASR::symbol_t*>& rt_subs,
ASR::Function_t* orig_func, const Location& call_loc,
bool raise_error=true) {
LCOMPILERS_ASSERT(call_args_vec.reserve_called);
// Fill the whole call_args_vec with nullptr
// This is for error handling later on.
for( size_t i = 0; i < n_pos_args + n_kwargs; i++ ) {
ASR::call_arg_t call_arg;
Location loc;
loc.first = loc.last = 1;
call_arg.m_value = nullptr;
call_arg.loc = loc;
call_args_vec.push_back(al, call_arg);
}
// Now handle positional arguments in the following loop
for( size_t i = 0; i < n_pos_args; i++ ) {
this->visit_expr(*pos_args[i]);
ASR::expr_t* expr = ASRUtils::EXPR(tmp);
call_args_vec.p[i].loc = expr->base.loc;
call_args_vec.p[i].m_value = expr;
}
// Now handle keyword arguments in the following loop
for( size_t i = 0; i < n_kwargs; i++ ) {
this->visit_expr(*kwargs[i].m_value);
ASR::expr_t* expr = ASRUtils::EXPR(tmp);
std::string arg_name = std::string(kwargs[i].m_arg);
int64_t arg_pos = find_argument_position_from_name(orig_func, arg_name, call_loc, raise_error);
if( arg_pos == -1 ) {
return false;
}
// Special treatment for argument to generic function's restriction
if (arg_pos == -2) {
if (ASR::is_a<ASR::Var_t>(*expr)) {
ASR::Var_t* var = ASR::down_cast<ASR::Var_t>(expr);
rt_subs[arg_name] = var->m_v;
}
continue;
}
if( call_args_vec[arg_pos].m_value != nullptr ) {
if( !raise_error ) {
return false;
}
throw SemanticError(std::string(orig_func->m_name) + "() got multiple values for argument '"
+ arg_name + "'",
call_loc);
}
call_args_vec.p[arg_pos].loc = expr->base.loc;
call_args_vec.p[arg_pos].m_value = expr;
}
return true;
}
void visit_expr_list(Vec<ASR::call_arg_t>& exprs, size_t n,
Vec<ASR::expr_t*>& exprs_vec) {
LCOMPILERS_ASSERT(exprs_vec.reserve_called);
for( size_t i = 0; i < n; i++ ) {
exprs_vec.push_back(al, exprs[i].m_value);
}
}
void visit_expr_list_with_cast(ASR::expr_t** m_args, size_t n_args,
Vec<ASR::call_arg_t>& call_args_vec,
Vec<ASR::call_arg_t>& args,
bool check_type_equality=true) {
LCOMPILERS_ASSERT(call_args_vec.reserve_called);
for (size_t i = 0; i < n_args; i++) {
ASR::call_arg_t c_arg;
c_arg.loc = args[i].loc;
c_arg.m_value = args[i].m_value;
cast_helper(m_args[i], c_arg.m_value, true);
ASR::ttype_t* left_type = ASRUtils::expr_type(m_args[i]);
ASR::ttype_t* right_type = ASRUtils::expr_type(c_arg.m_value);
if( check_type_equality && !ASRUtils::check_equal_type(left_type, right_type) ) {
std::string ltype = ASRUtils::type_to_str_python(left_type);
std::string rtype = ASRUtils::type_to_str_python(right_type);
diag.add(diag::Diagnostic(
"Type mismatch in procedure call; the types must be compatible",
diag::Level::Error, diag::Stage::Semantic, {
diag::Label("type mismatch (passed argument type is " + rtype + " but required type is " + ltype + ")",
{ c_arg.loc, left_type->base.loc})
})
);
throw SemanticAbort();
}
call_args_vec.push_back(al, c_arg);
}
}
ASR::ttype_t* get_type_from_var_annotation(std::string var_annotation,
const Location& loc, Vec<ASR::dimension_t>& dims,
AST::expr_t** m_args=nullptr, size_t n_args=0) {
ASR::ttype_t* type = nullptr;
if (var_annotation == "i8") {
type = ASRUtils::TYPE(ASR::make_Integer_t(al, loc,
1, dims.p, dims.size()));
} else if (var_annotation == "i16") {
type = ASRUtils::TYPE(ASR::make_Integer_t(al, loc,
2, dims.p, dims.size()));
} else if (var_annotation == "i32") {
type = ASRUtils::TYPE(ASR::make_Integer_t(al, loc,
4, dims.p, dims.size()));
} else if (var_annotation == "i64") {
type = ASRUtils::TYPE(ASR::make_Integer_t(al, loc,
8, dims.p, dims.size()));
} else if (var_annotation == "f32") {
type = ASRUtils::TYPE(ASR::make_Real_t(al, loc,
4, dims.p, dims.size()));
} else if (var_annotation == "f64") {
type = ASRUtils::TYPE(ASR::make_Real_t(al, loc,
8, dims.p, dims.size()));
} else if (var_annotation == "c32") {
type = ASRUtils::TYPE(ASR::make_Complex_t(al, loc,
4, dims.p, dims.size()));
} else if (var_annotation == "c64") {
type = ASRUtils::TYPE(ASR::make_Complex_t(al, loc,
8, dims.p, dims.size()));
} else if (var_annotation == "str") {
type = ASRUtils::TYPE(ASR::make_Character_t(al, loc,
1, -2, nullptr, dims.p, dims.size()));
} else if (var_annotation == "bool") {
type = ASRUtils::TYPE(ASR::make_Logical_t(al, loc,
4, dims.p, dims.size()));
} else if (var_annotation == "CPtr") {
type = ASRUtils::TYPE(ASR::make_CPtr_t(al, loc));
} else if (var_annotation == "pointer") {
LCOMPILERS_ASSERT(n_args == 1);
AST::expr_t* underlying_type = m_args[0];
type = ast_expr_to_asr_type(underlying_type->base.loc, *underlying_type);
type = ASRUtils::TYPE(ASR::make_Pointer_t(al, loc, type));
} else {
ASR::symbol_t *s = current_scope->resolve_symbol(var_annotation);
if (s) {
if (ASR::is_a<ASR::Variable_t>(*s)) {
ASR::Variable_t *var_sym = ASR::down_cast<ASR::Variable_t>(s);
if (var_sym->m_type->type == ASR::ttypeType::TypeParameter) {
ASR::TypeParameter_t *type_param = ASR::down_cast<ASR::TypeParameter_t>(var_sym->m_type);
return ASRUtils::TYPE(ASR::make_TypeParameter_t(al, loc,
type_param->m_param, dims.p, dims.size()));
}
} else {
ASR::symbol_t *der_sym = ASRUtils::symbol_get_past_external(s);
if( der_sym ) {
if ( ASR::is_a<ASR::StructType_t>(*der_sym) ) {
return ASRUtils::TYPE(ASR::make_Struct_t(al, loc, der_sym, dims.p, dims.size()));
} else if( ASR::is_a<ASR::EnumType_t>(*der_sym) ) {
return ASRUtils::TYPE(ASR::make_Enum_t(al, loc, der_sym, dims.p, dims.size()));
} else if( ASR::is_a<ASR::UnionType_t>(*der_sym) ) {
return ASRUtils::TYPE(ASR::make_Union_t(al, loc, der_sym, dims.p, dims.size()));
}
}
}
}
throw SemanticError("Unsupported type annotation: " + var_annotation, loc);
}
return type;
}
// Function to create appropriate call based on symbol type. If it is external
// generic symbol then it changes the name accordingly.
ASR::asr_t* make_call_helper(Allocator &al, ASR::symbol_t* s, SymbolTable *current_scope,
Vec<ASR::call_arg_t> args, std::string call_name, const Location &loc,
bool ignore_return_value=false, AST::expr_t** pos_args=nullptr, size_t n_pos_args=0,
AST::keyword_t* kwargs=nullptr, size_t n_kwargs=0) {
if (intrinsic_node_handler.is_present(call_name)) {
return intrinsic_node_handler.get_intrinsic_node(call_name, al, loc,
args);
}
if (call_name == "list" && (args.size() == 0 || args[0].m_value == nullptr)) {
if (ann_assign_target_type) {
ASR::ttype_t *type = ASRUtils::get_contained_type(ann_assign_target_type);
ASR::ttype_t* list_type = ASRUtils::TYPE(ASR::make_List_t(al, loc, type));
Vec<ASR::expr_t*> list;
list.reserve(al, 1);
return ASR::make_ListConstant_t(al, loc, list.p,
list.size(), list_type);
}
return nullptr;
}
ASR::symbol_t *s_generic = nullptr, *stemp = s;
// Type map for generic functions
std::map<std::string, ASR::ttype_t*> subs;
std::map<std::string, ASR::symbol_t*> rt_subs;
// handling ExternalSymbol
s = ASRUtils::symbol_get_past_external(s);
bool is_generic_procedure = ASR::is_a<ASR::GenericProcedure_t>(*s);
if (ASR::is_a<ASR::GenericProcedure_t>(*s)) {
s_generic = stemp;
ASR::GenericProcedure_t *p = ASR::down_cast<ASR::GenericProcedure_t>(s);
int idx = -1;
if( n_kwargs > 0 ) {
args.reserve(al, n_pos_args + n_kwargs);
for( size_t iproc = 0; iproc < p->n_procs; iproc++ ) {
args.n = 0;
ASR::Function_t* orig_func = ASR::down_cast<ASR::Function_t>(p->m_procs[iproc]);
if( !visit_expr_list(pos_args, n_pos_args, kwargs, n_kwargs,
args, rt_subs, orig_func, loc, false) ) {
continue;
}
idx = ASRUtils::select_generic_procedure(args, *p, loc,
[&](const std::string &msg, const Location &loc) { throw SemanticError(msg, loc); },
false);
if( idx == (int) iproc ) {
break;
}