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4419 lines (4206 loc) · 123 KB
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#include <cctype>
#include <lpython/ast_to_src.h>
#include <libasr/string_utils.h>
#include <lpython/bigint.h>
using LFortran::AST::expr_t;
using LFortran::AST::Name_t;
using LFortran::AST::Num_t;
using LFortran::AST::BinOp_t;
using LFortran::AST::operatorType;
using LFortran::AST::BaseVisitor;
using LFortran::AST::StrOp_t;
namespace LFortran {
namespace {
std::string op2str(const operatorType type)
{
switch (type) {
case (operatorType::Add) : return " + ";
case (operatorType::Sub) : return " - ";
case (operatorType::Mul) : return "*";
case (operatorType::Div) : return "/";
case (operatorType::Pow) : return "**";
}
throw LFortranException("Unknown type");
}
std::string boolop2str(const AST::boolopType type)
{
switch (type) {
case (AST::boolopType::And) : return " .and. ";
case (AST::boolopType::Or) : return " .or. ";
case (AST::boolopType::Xor) : return " .xor. ";
case (AST::boolopType::Eqv) : return " .eqv. ";
case (AST::boolopType::NEqv) : return " .neqv. ";
}
throw LFortranException("Unknown type");
}
std::string cmpop2str(const AST::cmpopType type)
{
switch (type) {
case (AST::cmpopType::Eq) : return " == ";
case (AST::cmpopType::Gt) : return " > ";
case (AST::cmpopType::GtE) : return " >= ";
case (AST::cmpopType::Lt) : return " < ";
case (AST::cmpopType::LtE) : return " <= ";
case (AST::cmpopType::NotEq) : return " /= ";
}
throw LFortranException("Unknown type");
}
std::string strop2str(const AST::stroperatorType type)
{
switch (type) {
case (AST::stroperatorType::Concat) : return " // ";
}
throw LFortranException("Unknown type");
}
std::string intrinsicop2str(const AST::intrinsicopType type)
{
switch (type) {
case (AST::intrinsicopType::AND) : return ".and.";
case (AST::intrinsicopType::OR) : return ".or.";
case (AST::intrinsicopType::XOR) : return ".xor.";
case (AST::intrinsicopType::EQV) : return ".eqv.";
case (AST::intrinsicopType::NEQV) : return ".neqv.";
case (AST::intrinsicopType::PLUS) : return "+";
case (AST::intrinsicopType::MINUS) : return "-";
case (AST::intrinsicopType::STAR) : return "*";
case (AST::intrinsicopType::DIV) : return "/";
case (AST::intrinsicopType::POW) : return "**";
case (AST::intrinsicopType::NOT) : return ".not.";
case (AST::intrinsicopType::EQ) : return "==";
case (AST::intrinsicopType::GT) : return ">";
case (AST::intrinsicopType::GTE) : return ">=";
case (AST::intrinsicopType::LT) : return "<";
case (AST::intrinsicopType::LTE) : return "<=";
case (AST::intrinsicopType::NOTEQ) : return "/=";
case (AST::intrinsicopType::CONCAT) : return "//";
}
throw LFortranException("Unknown type");
}
std::string symbol2str(const AST::symbolType type)
{
switch (type) {
case (AST::symbolType::None) : return "";
case (AST::symbolType::Arrow) : return " => ";
case (AST::symbolType::Equal) : return " = ";
case (AST::symbolType::Asterisk) : return "*";
case (AST::symbolType::DoubleAsterisk) : return "*(*)";
case (AST::symbolType::Slash) : return "/";
}
throw LFortranException("Unknown type");
}
}
namespace AST {
class ASTToSRCVisitor : public BaseVisitor<ASTToSRCVisitor>
{
public:
std::string s;
bool use_colors;
int indent_level;
std::string indent;
int indent_spaces;
bool indent_unit;
// The precedence of the last expression, using the table
// 10.1 in the Fortran 2018 standard:
int last_expr_precedence;
// Syntax highlighting groups
enum gr {
// Type
UnitHeader, // program, end program
Type, // integer, real, character, complex
// Constant
String, // "some string"
Integer, // 234
Real, // 5.5_dp
Logical, // .true., .false.
Complex, // (7,8)
// Functions
Call, // call
Intrinsic, // exp, sin, cos
// Statements
Conditional, // if, then, else, end if, where, select case
Repeat, // do, while, forall
Keyword, // any other keyword: print
// Operators
Operator,
// Reset
Reset, // resets any previously set formatting
};
std::string syn_reset;
public:
ASTToSRCVisitor(bool color, int indent, bool indent_unit)
: use_colors{color}, indent_level{0},
indent_spaces{indent}, indent_unit{indent_unit}
{ }
std::string syn(const gr &g=gr::Reset) {
std::string syn_color;
if (use_colors) {
switch (g) {
case (gr::UnitHeader) : {
syn_color = color(fgB::cyan);
syn_reset = color(fg::reset);
break;
}
case (gr::Type) : {
syn_color = color(fgB::green);
syn_reset = color(fg::reset);
break;
}
case (gr::String) :
case (gr::Integer) :
case (gr::Real) :
case (gr::Logical) :
case (gr::Complex) : {
syn_color = color(fg::magenta);
syn_reset = color(fg::reset);
break;
}
case (gr::Call) :
case (gr::Intrinsic) : {
syn_color = color(fgB::cyan) + color(style::bold);
syn_reset = color(fg::reset) + color(style::reset);
break;
}
case (gr::Conditional) :
case (gr::Repeat) :
case (gr::Keyword) : {
syn_color = color(fg::yellow);
syn_reset = color(fg::reset);
break;
}
case (gr::Operator) : {
syn_color = color(fg::blue) + color(style::bold);
syn_reset = color(fg::reset) + color(style::reset);
break;
}
case (gr::Reset) : {
syn_color = syn_reset;
syn_reset = "";
break;
} ;
default : {
throw LFortranException("Syntax Group not implemented");
}
}
}
return syn_color;
}
void inc_indent() {
indent_level++;
indent = std::string(indent_level*indent_spaces, ' ');
}
void dec_indent() {
indent_level--;
indent = std::string(indent_level*indent_spaces, ' ');
}
std::string print_trivia_inside(const trivia_t &x) {
std::string r;
auto y = (TriviaNode_t &)x;
if(y.n_inside > 0) {
for (size_t i=0; i<y.n_inside; i++) {
switch (y.m_inside[i]->type) {
case trivia_nodeType::Comment: {
r += std::string(
down_cast<Comment_t>(y.m_inside[i])->m_comment
);
r += "\n";
break;
}
case trivia_nodeType::EOLComment: {
r += " ";
r += std::string(
down_cast<EOLComment_t>(y.m_inside[i])->m_comment
);
r += "\n";
break;
}
case trivia_nodeType::EndOfLine: {
r += "\n";
break;
}
case trivia_nodeType::Semicolon: {
r += "; ";
break;
}
}
}
} else {
return "\n";
}
return r;
}
std::string print_trivia_after(const trivia_t &x) {
std::string r;
auto y = (TriviaNode_t &)x;
if(y.n_after > 0) {
for (size_t i=0; i<y.n_after; i++) {
switch (y.m_after[i]->type) {
case trivia_nodeType::Comment: {
r += std::string(
down_cast<Comment_t>(y.m_after[i])->m_comment
);
r += "\n";
break;
}
case trivia_nodeType::EOLComment: {
r += " ";
r += std::string(
down_cast<EOLComment_t>(y.m_after[i])->m_comment
);
r += "\n";
break;
}
case trivia_nodeType::EndOfLine: {
r += "\n";
break;
}
case trivia_nodeType::Semicolon: {
r += "; ";
break;
}
}
}
} else {
return "\n";
}
return r;
}
void visit_TranslationUnit(const TranslationUnit_t &x) {
std::string r;
for (size_t i=0; i<x.n_items; i++) {
this->visit_ast(*x.m_items[i]);
r += s;
if (i < x.n_items-1) {
if (is_a<expr_t>(*x.m_items[i]) || (
( is_a<mod_t>(*x.m_items[i])
|| is_a<program_unit_t>(*x.m_items[i])
) &&
( is_a<mod_t>(*x.m_items[i+1])
|| is_a<program_unit_t>(*x.m_items[i+1])
)
)
) {
r.append("\n");
}
}
}
s = r;
}
void visit_Module(const Module_t &x) {
std::string r = "";
r += syn(gr::UnitHeader);
r.append("module");
r += syn();
r += " ";
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
r += format_unit_body(x);
r += syn(gr::UnitHeader);
r.append("end module");
r += syn();
r += " ";
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_Submodule(const Submodule_t &x) {
std::string r = "";
r += syn(gr::UnitHeader);
r.append("submodule");
r += syn();
r += " (";
r.append(x.m_id);
if(x.m_parent_name) {
r += ":";
r.append(x.m_parent_name);
}
r += ") ";
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
if (indent_unit) inc_indent();
if(x.n_use > 0) {
for (size_t i=0; i<x.n_use; i++) {
this->visit_unit_decl1(*x.m_use[i]);
r.append(s);
}
r.append("\n");
}
if(x.n_decl > 0) {
for (size_t i=0; i<x.n_decl; i++) {
this->visit_unit_decl2(*x.m_decl[i]);
r.append(s);
}
r.append("\n");
}
if (x.n_contains > 0) {
r += "\n";
r += syn(gr::UnitHeader);
r.append("contains");
r += syn();
r += "\n\n";
inc_indent();
for (size_t i=0; i<x.n_contains; i++) {
this->visit_program_unit(*x.m_contains[i]);
r.append(s);
r.append("\n");
}
dec_indent();
}
if (indent_unit) dec_indent();
r += syn(gr::UnitHeader);
r.append("end submodule");
r += syn();
r += " ";
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_BlockData(const BlockData_t &x) {
std::string r = indent;
r += syn(gr::UnitHeader);
r += "block data";
r += syn();
if(x.m_name) {
r += " ";
r.append(x.m_name);
}
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
inc_indent();
for (size_t i=0; i<x.n_use; i++) {
this->visit_unit_decl1(*x.m_use[i]);
r.append(s);
}
r += format_implicit(x);
for (size_t i=0; i<x.n_decl; i++) {
this->visit_unit_decl2(*x.m_decl[i]);
r.append(s);
}
dec_indent();
r += indent;
r += syn(gr::UnitHeader);
r.append("end block data");
r += syn();
if(x.m_name) {
r += " ";
r.append(x.m_name);
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_Program(const Program_t &x) {
std::string r;
r += syn(gr::UnitHeader);
r.append("program");
r += syn();
r += " ";
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
r += format_unit_body(x);
r += syn(gr::UnitHeader);
r.append("end program");
r += syn();
r += " ";
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_Subroutine(const Subroutine_t &x) {
std::string r = indent;
for (size_t i=0; i<x.n_attributes; i++) {
visit_decl_attribute(*x.m_attributes[i]);
r += s;
r.append(" ");
}
r += syn(gr::UnitHeader);
r.append("subroutine");
r += syn();
r += " ";
r.append(x.m_name);
r.append("(");
for (size_t i=0; i<x.n_args; i++) {
this->visit_arg(x.m_args[i]);
r.append(s);
if (i < x.n_args-1) r.append(", ");
}
r.append(")");
if (x.m_bind) {
r.append(" ");
this->visit_bind(*x.m_bind);
r.append(s);
}
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
r += format_unit_body(x, !indent_unit);
r += indent;
r += syn(gr::UnitHeader);
r.append("end subroutine");
r += syn();
r += " ";
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_Procedure(const Procedure_t &x) {
std::string r = indent;
for (size_t i=0; i<x.n_attributes; i++) {
visit_decl_attribute(*x.m_attributes[i]);
r += s;
r.append(" ");
}
r += syn(gr::UnitHeader);
r.append("procedure");
r += syn();
r += " ";
r.append(x.m_name);
r.append("(");
for (size_t i=0; i<x.n_args; i++) {
this->visit_arg(x.m_args[i]);
r.append(s);
if (i < x.n_args-1) r.append(", ");
}
r.append(")");
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
r += format_unit_body(x, !indent_unit);
r += indent;
r += syn(gr::UnitHeader);
r.append("end procedure");
r += syn();
r += " ";
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_DerivedType(const DerivedType_t &x) {
std::string r = indent;
r += syn(gr::UnitHeader);
r.append("type");
r += syn();
for (size_t i=0; i<x.n_attrtype; i++) {
if (i == 0) r.append(", ");
this->visit_decl_attribute(*x.m_attrtype[i]);
r.append(s);
if (i < x.n_attrtype-1) r.append(", ");
}
r.append(" :: ");
r.append(x.m_name);
for (size_t i=0; i<x.n_namelist; i++) {
if (i == 0) r += "(";
r.append(x.m_namelist[i]);
if (i < x.n_namelist-1) r.append(", ");
else r += ")";
}
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
inc_indent();
for (size_t i=0; i<x.n_items; i++) {
visit_unit_decl2(*x.m_items[i]);
r.append(s);
}
dec_indent();
if (x.n_contains) {
r += "\n";
r += syn(gr::UnitHeader);
r.append("contains");
r += syn();
r += "\n\n";
for (size_t i=0; i<x.n_contains; i++) {
this->visit_procedure_decl(*x.m_contains[i]);
r.append(s);
// r.append("\n");
}
}
r += syn(gr::UnitHeader);
r.append(indent + "end type ");
r += syn();
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_DerivedTypeProc(const DerivedTypeProc_t &x) {
std::string r;
r += syn(gr::String);
r.append("procedure");
r += syn();
if (x.m_name) {
r += "(";
r.append(x.m_name);
r += ")";
}
for (size_t i=0; i<x.n_attr; i++) {
if (i == 0) r.append(", ");
this->visit_decl_attribute(*x.m_attr[i]);
r.append(s);
if (i < x.n_attr-1) r.append(", ");
}
r.append(" :: ");
for (size_t i=0; i<x.n_symbols; i++) {
this->visit_use_symbol(*x.m_symbols[i]);
r.append(s);
if (i < x.n_symbols-1) r.append(", ");
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_GenericOperator(const GenericOperator_t &x) {
std::string r;
r += syn(gr::String);
r.append("generic");
r += syn();
if(x.n_attr > 0 && x.m_attr[0] != nullptr){
r += ", ";
this->visit_decl_attribute(*x.m_attr[0]);
r.append(s);
}
r += " :: operator(" + intrinsicop2str(x.m_op) + ")";
r += " => ";
for (size_t i=0; i<x.n_names; i++) {
r.append(x.m_names[i]);
if (i < x.n_names-1) r.append(", ");
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_GenericDefinedOperator(const GenericDefinedOperator_t &x) {
std::string r;
r += syn(gr::String);
r.append("generic");
r += syn();
if(x.n_attr > 0 && x.m_attr[0] != nullptr){
r += ", ";
this->visit_decl_attribute(*x.m_attr[0]);
r.append(s);
}
r += " :: operator(";
r += syn(gr::Operator);
r += "." + std::string(x.m_optype) + ".";
r += syn();
r += ")";
r += " => ";
for (size_t i=0; i<x.n_names; i++) {
r.append(x.m_names[i]);
if (i < x.n_names-1) r.append(", ");
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_GenericAssignment(const GenericAssignment_t &x) {
std::string r;
r += syn(gr::String);
r.append("generic");
r += syn();
if(x.n_attr > 0 && x.m_attr[0] != nullptr){
r += ", ";
this->visit_decl_attribute(*x.m_attr[0]);
r.append(s);
}
r += " :: assignment(=) => ";
for (size_t i=0; i<x.n_names; i++) {
r.append(x.m_names[i]);
if (i < x.n_names-1) r.append(", ");
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_GenericName(const GenericName_t &x) {
std::string r;
r += syn(gr::String);
r.append("generic");
r += syn();
if(x.n_attr > 0 && x.m_attr[0] != nullptr){
r += ", ";
this->visit_decl_attribute(*x.m_attr[0]);
r.append(s);
}
r += " :: ";
r.append(x.m_name);
r += " => ";
for (size_t i=0; i<x.n_names; i++) {
r.append(x.m_names[i]);
if (i < x.n_names-1) r.append(", ");
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_GenericWrite(const GenericWrite_t &x) {
std::string r;
r += syn(gr::String);
r.append("generic");
r += syn();
if(x.n_attr > 0 && x.m_attr[0] != nullptr){
r += ", ";
this->visit_decl_attribute(*x.m_attr[0]);
r.append(s);
}
r += " :: ";
r += "write(";
r.append(x.m_id);
r += ")";
r += " => ";
for (size_t i=0; i<x.n_names; i++) {
r.append(x.m_names[i]);
if (i < x.n_names-1) r.append(", ");
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_GenericRead(const GenericRead_t &x) {
std::string r;
r += syn(gr::String);
r.append("generic");
r += syn();
if(x.n_attr > 0 && x.m_attr[0] != nullptr){
r += ", ";
this->visit_decl_attribute(*x.m_attr[0]);
r.append(s);
}
r += " :: ";
r += "read(";
r.append(x.m_id);
r += ")";
r += " => ";
for (size_t i=0; i<x.n_names; i++) {
r.append(x.m_names[i]);
if (i < x.n_names-1) r.append(", ");
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_FinalName(const FinalName_t &x) {
std::string r;
r += syn(gr::String);
r.append("final :: ");
r += syn();
r.append(x.m_name);
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_Private(const Private_t &x) {
std::string r;
r += syn(gr::Type);
r.append("private");
r += syn();
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_Enum(const Enum_t & x) {
std::string r = indent;
r += syn(gr::UnitHeader);
r.append("enum");
r += syn();
if(x.n_attr) {
r.append(", ");
for (size_t i=0; i<x.n_attr; i++) {
this->visit_decl_attribute(*x.m_attr[i]);
r.append(s);
}
}
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
inc_indent();
for (size_t i=0; i<x.n_items; i++) {
this->visit_unit_decl2(*x.m_items[i]);
r.append(s);
}
dec_indent();
r += syn(gr::UnitHeader);
r.append("end enum");
r += syn();
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_Interface(const Interface_t &x) {
std::string r;
if(x.m_header->type == AbstractInterfaceHeader) {
r += "abstract ";
}
r += syn(gr::UnitHeader);
r.append("interface");
r += syn();
this->visit_interface_header(*x.m_header);
r.append(s);
if(x.m_trivia){
r += print_trivia_inside(*x.m_trivia);
} else {
r.append("\n");
}
inc_indent();
for (size_t i=0; i<x.n_items; i++) {
this->visit_interface_item(*x.m_items[i]);
r.append(s);
}
dec_indent();
r += syn(gr::UnitHeader);
r.append("end interface");
r += syn();
this->visit_interface_header(*x.m_header);
r.append(s);
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_InterfaceHeader(const InterfaceHeader_t &/* x */) {
s = "";
}
void visit_InterfaceHeaderName(const InterfaceHeaderName_t &x) {
s = " ";
s += x.m_name;
}
void visit_InterfaceHeaderAssignment
(const InterfaceHeaderAssignment_t &/* x */) {
s = " assignment (=)";
}
void visit_InterfaceHeaderOperator
(const InterfaceHeaderOperator_t &x) {
s = " operator (" + intrinsicop2str(x.m_op) + ")";
}
void visit_InterfaceHeaderDefinedOperator
(const InterfaceHeaderDefinedOperator_t &x) {
s = " operator (";
s += syn(gr::Operator);
s += "." + std::string(x.m_operator_name) + ".";
s += syn();
s += ")";
}
void visit_AbstractInterfaceHeader
(const AbstractInterfaceHeader_t &/* x */) {
s = "";
}
void visit_InterfaceHeaderWrite(const InterfaceHeaderWrite_t &x) {
s = " write(";
s.append(x.m_id);
s += ")";
}
void visit_InterfaceHeaderRead(const InterfaceHeaderRead_t &x) {
s = " read(";
s.append(x.m_id);
s += ")";
}
void visit_InterfaceModuleProcedure(const InterfaceModuleProcedure_t &x) {
std::string r = indent;
for (size_t i=0; i<x.n_attributes; i++) {
visit_decl_attribute(*x.m_attributes[i]);
r += s;
r.append(" ");
}
r += syn(gr::UnitHeader);
r.append("procedure ");
r += syn();
for (size_t i=0; i<x.n_names; i++) {
r.append(x.m_names[i]);
if (i < x.n_names-1) r.append(", ");
}
if(x.m_trivia){
r += print_trivia_after(*x.m_trivia);
} else {
r.append("\n");
}
s = r;
}
void visit_InterfaceProc(const InterfaceProc_t &x) {
std::string r;
this->visit_program_unit(*x.m_proc);
r.append(s);
s = r;
}
template <typename T>
std::string format_import(const T &x) {
std::string r;
for (size_t i=0; i<x.n_import; i++) {
this->visit_import_statement(*x.m_import[i]);
r.append(s);
}
return r;
}
std::string format_import(const Program_t &/*x*/) {
return "";
}
std::string format_import(const Module_t &/*x*/) {
return "";
}
template <typename T>
std::string format_implicit(const T &x) {
std::string r;
for (size_t i=0; i<x.n_implicit; i++) {
this->visit_implicit_statement(*x.m_implicit[i]);
r.append(s);
}
return r;
}
template <typename T>
std::string format_body(const T &x) {
std::string r;
for (size_t i=0; i<x.n_body; i++) {
this->visit_stmt(*x.m_body[i]);
r.append(s);
}
return r;
}