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io-parsers.cpp
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//===-- lib/Parser/io-parsers.cpp -----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Per-type parsers for I/O statements and FORMAT
#include "basic-parsers.h"
#include "expr-parsers.h"
#include "misc-parsers.h"
#include "stmt-parser.h"
#include "token-parsers.h"
#include "type-parser-implementation.h"
#include "flang/Parser/characters.h"
#include "flang/Parser/parse-tree.h"
namespace Fortran::parser {
// R1201 io-unit -> file-unit-number | * | internal-file-variable
// R1203 internal-file-variable -> char-variable
// R905 char-variable -> variable
// "char-variable" is attempted first since it's not type constrained but
// syntactically ambiguous with "file-unit-number", which is constrained.
// Note, "file-unit-number" is replaced by "expr" to allow for better
// error messages.
TYPE_PARSER(construct<IoUnit>(variable / lookAhead(space / ",);\n"_ch)) ||
construct<IoUnit>(
indirect(expr) / (lookAhead(space >> ",)"_ch) || atEndOfStmt)) ||
construct<IoUnit>(star))
// R1202 file-unit-number -> scalar-int-expr
TYPE_PARSER(construct<FileUnitNumber>(
scalarIntExpr / (lookAhead(space >> ",)"_ch) || atEndOfStmt)))
// R1204 open-stmt -> OPEN ( connect-spec-list )
TYPE_CONTEXT_PARSER("OPEN statement"_en_US,
construct<OpenStmt>(
"OPEN (" >> nonemptyList("expected connection specifications"_err_en_US,
Parser<ConnectSpec>{}) /
")"))
// R1206 file-name-expr -> scalar-default-char-expr
constexpr auto fileNameExpr{scalarDefaultCharExpr};
// R1205 connect-spec ->
// [UNIT =] file-unit-number | ACCESS = scalar-default-char-expr |
// ACTION = scalar-default-char-expr |
// ASYNCHRONOUS = scalar-default-char-expr |
// BLANK = scalar-default-char-expr |
// DECIMAL = scalar-default-char-expr |
// DELIM = scalar-default-char-expr |
// ENCODING = scalar-default-char-expr | ERR = label |
// FILE = file-name-expr | FORM = scalar-default-char-expr |
// IOMSG = iomsg-variable | IOSTAT = scalar-int-variable |
// NEWUNIT = scalar-int-variable | PAD = scalar-default-char-expr |
// POSITION = scalar-default-char-expr | RECL = scalar-int-expr |
// ROUND = scalar-default-char-expr | SIGN = scalar-default-char-expr |
// STATUS = scalar-default-char-expr
// @ | CARRIAGECONTROL = scalar-default-char-variable
// | CONVERT = scalar-default-char-variable
// | DISPOSE = scalar-default-char-variable
constexpr auto statusExpr{construct<StatusExpr>(scalarDefaultCharExpr)};
constexpr auto errLabel{construct<ErrLabel>(label)};
TYPE_PARSER(first(construct<ConnectSpec>(maybe("UNIT ="_tok) >> fileUnitNumber),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"ACCESS =" >> pure(ConnectSpec::CharExpr::Kind::Access),
scalarDefaultCharExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"ACTION =" >> pure(ConnectSpec::CharExpr::Kind::Action),
scalarDefaultCharExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"ASYNCHRONOUS =" >> pure(ConnectSpec::CharExpr::Kind::Asynchronous),
scalarDefaultCharExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"BLANK =" >> pure(ConnectSpec::CharExpr::Kind::Blank),
scalarDefaultCharExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"DECIMAL =" >> pure(ConnectSpec::CharExpr::Kind::Decimal),
scalarDefaultCharExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"DELIM =" >> pure(ConnectSpec::CharExpr::Kind::Delim),
scalarDefaultCharExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"ENCODING =" >> pure(ConnectSpec::CharExpr::Kind::Encoding),
scalarDefaultCharExpr)),
construct<ConnectSpec>("ERR =" >> errLabel),
construct<ConnectSpec>("FILE =" >> fileNameExpr),
extension<LanguageFeature::FileName>(
"nonstandard usage: NAME= in place of FILE="_port_en_US,
construct<ConnectSpec>("NAME =" >> fileNameExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"FORM =" >> pure(ConnectSpec::CharExpr::Kind::Form),
scalarDefaultCharExpr)),
construct<ConnectSpec>("IOMSG =" >> msgVariable),
construct<ConnectSpec>("IOSTAT =" >> statVariable),
construct<ConnectSpec>(construct<ConnectSpec::Newunit>(
"NEWUNIT =" >> scalar(integer(variable)))),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"PAD =" >> pure(ConnectSpec::CharExpr::Kind::Pad),
scalarDefaultCharExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"POSITION =" >> pure(ConnectSpec::CharExpr::Kind::Position),
scalarDefaultCharExpr)),
construct<ConnectSpec>(
construct<ConnectSpec::Recl>("RECL =" >> scalarIntExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"ROUND =" >> pure(ConnectSpec::CharExpr::Kind::Round),
scalarDefaultCharExpr)),
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"SIGN =" >> pure(ConnectSpec::CharExpr::Kind::Sign),
scalarDefaultCharExpr)),
construct<ConnectSpec>("STATUS =" >> statusExpr),
extension<LanguageFeature::Carriagecontrol>(
"nonstandard usage: CARRIAGECONTROL="_port_en_US,
construct<ConnectSpec>(
construct<ConnectSpec::CharExpr>("CARRIAGECONTROL =" >>
pure(ConnectSpec::CharExpr::Kind::Carriagecontrol),
scalarDefaultCharExpr))),
extension<LanguageFeature::Convert>(
"nonstandard usage: CONVERT="_port_en_US,
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"CONVERT =" >> pure(ConnectSpec::CharExpr::Kind::Convert),
scalarDefaultCharExpr))),
extension<LanguageFeature::Dispose>(
"nonstandard usage: DISPOSE="_port_en_US,
construct<ConnectSpec>(construct<ConnectSpec::CharExpr>(
"DISPOSE =" >> pure(ConnectSpec::CharExpr::Kind::Dispose),
scalarDefaultCharExpr)))))
// R1209 close-spec ->
// [UNIT =] file-unit-number | IOSTAT = scalar-int-variable |
// IOMSG = iomsg-variable | ERR = label |
// STATUS = scalar-default-char-expr
constexpr auto closeSpec{first(
construct<CloseStmt::CloseSpec>(maybe("UNIT ="_tok) >> fileUnitNumber),
construct<CloseStmt::CloseSpec>("IOSTAT =" >> statVariable),
construct<CloseStmt::CloseSpec>("IOMSG =" >> msgVariable),
construct<CloseStmt::CloseSpec>("ERR =" >> errLabel),
construct<CloseStmt::CloseSpec>("STATUS =" >> statusExpr))};
// R1208 close-stmt -> CLOSE ( close-spec-list )
TYPE_CONTEXT_PARSER("CLOSE statement"_en_US,
construct<CloseStmt>("CLOSE" >> parenthesized(nonemptyList(closeSpec))))
// R1210 read-stmt ->
// READ ( io-control-spec-list ) [input-item-list] |
// READ format [, input-item-list]
// The ambiguous READ(CVAR) is parsed as if CVAR were the unit.
// As Fortran doesn't have internal unformatted I/O, it should
// be parsed as if (CVAR) were a format; this is corrected by
// rewriting in semantics when we know that CVAR is character.
constexpr auto inputItemList{
extension<LanguageFeature::IOListLeadingComma>(
"nonstandard usage: leading comma in input item list"_port_en_US,
some("," >> inputItem)) || // legacy extension: leading comma
optionalList(inputItem)};
TYPE_CONTEXT_PARSER("READ statement"_en_US,
construct<ReadStmt>("READ (" >>
construct<std::optional<IoUnit>>(maybe("UNIT ="_tok) >> ioUnit),
"," >> construct<std::optional<Format>>(format),
defaulted("," >> nonemptyList(ioControlSpec)) / ")", inputItemList) ||
construct<ReadStmt>(
"READ (" >> construct<std::optional<IoUnit>>(ioUnit),
construct<std::optional<Format>>(),
defaulted("," >> nonemptyList(ioControlSpec)) / ")",
inputItemList) ||
construct<ReadStmt>("READ" >> construct<std::optional<IoUnit>>(),
construct<std::optional<Format>>(),
parenthesized(nonemptyList(ioControlSpec)), inputItemList) ||
construct<ReadStmt>("READ" >> construct<std::optional<IoUnit>>(),
construct<std::optional<Format>>(format),
construct<std::list<IoControlSpec>>(), many("," >> inputItem)))
// R1214 id-variable -> scalar-int-variable
constexpr auto idVariable{construct<IdVariable>(scalarIntVariable)};
// R1213 io-control-spec ->
// [UNIT =] io-unit | [FMT =] format | [NML =] namelist-group-name |
// ADVANCE = scalar-default-char-expr |
// ASYNCHRONOUS = scalar-default-char-constant-expr |
// BLANK = scalar-default-char-expr |
// DECIMAL = scalar-default-char-expr |
// DELIM = scalar-default-char-expr | END = label | EOR = label |
// ERR = label | ID = id-variable | IOMSG = iomsg-variable |
// IOSTAT = scalar-int-variable | PAD = scalar-default-char-expr |
// POS = scalar-int-expr | REC = scalar-int-expr |
// ROUND = scalar-default-char-expr | SIGN = scalar-default-char-expr |
// SIZE = scalar-int-variable
constexpr auto endLabel{construct<EndLabel>(label)};
constexpr auto eorLabel{construct<EorLabel>(label)};
TYPE_PARSER(first(construct<IoControlSpec>("UNIT =" >> ioUnit),
construct<IoControlSpec>("FMT =" >> format),
construct<IoControlSpec>("NML =" >> name),
construct<IoControlSpec>(
"ADVANCE =" >> construct<IoControlSpec::CharExpr>(
pure(IoControlSpec::CharExpr::Kind::Advance),
scalarDefaultCharExpr)),
construct<IoControlSpec>(construct<IoControlSpec::Asynchronous>(
"ASYNCHRONOUS =" >> scalarDefaultCharConstantExpr)),
construct<IoControlSpec>("BLANK =" >>
construct<IoControlSpec::CharExpr>(
pure(IoControlSpec::CharExpr::Kind::Blank), scalarDefaultCharExpr)),
construct<IoControlSpec>(
"DECIMAL =" >> construct<IoControlSpec::CharExpr>(
pure(IoControlSpec::CharExpr::Kind::Decimal),
scalarDefaultCharExpr)),
construct<IoControlSpec>("DELIM =" >>
construct<IoControlSpec::CharExpr>(
pure(IoControlSpec::CharExpr::Kind::Delim), scalarDefaultCharExpr)),
construct<IoControlSpec>("END =" >> endLabel),
construct<IoControlSpec>("EOR =" >> eorLabel),
construct<IoControlSpec>("ERR =" >> errLabel),
construct<IoControlSpec>("ID =" >> idVariable),
construct<IoControlSpec>("IOMSG = " >> msgVariable),
construct<IoControlSpec>("IOSTAT = " >> statVariable),
construct<IoControlSpec>("PAD =" >>
construct<IoControlSpec::CharExpr>(
pure(IoControlSpec::CharExpr::Kind::Pad), scalarDefaultCharExpr)),
construct<IoControlSpec>(
"POS =" >> construct<IoControlSpec::Pos>(scalarIntExpr)),
construct<IoControlSpec>(
"REC =" >> construct<IoControlSpec::Rec>(scalarIntExpr)),
construct<IoControlSpec>("ROUND =" >>
construct<IoControlSpec::CharExpr>(
pure(IoControlSpec::CharExpr::Kind::Round), scalarDefaultCharExpr)),
construct<IoControlSpec>("SIGN =" >>
construct<IoControlSpec::CharExpr>(
pure(IoControlSpec::CharExpr::Kind::Sign), scalarDefaultCharExpr)),
construct<IoControlSpec>(
"SIZE =" >> construct<IoControlSpec::Size>(scalarIntVariable))))
// R1211 write-stmt -> WRITE ( io-control-spec-list ) [output-item-list]
constexpr auto outputItemList{
extension<LanguageFeature::IOListLeadingComma>(
"nonstandard usage: leading comma in output item list"_port_en_US,
some("," >> outputItem)) || // legacy: allow leading comma
optionalList(outputItem)};
TYPE_CONTEXT_PARSER("WRITE statement"_en_US,
construct<WriteStmt>("WRITE (" >>
construct<std::optional<IoUnit>>(maybe("UNIT ="_tok) >> ioUnit),
"," >> construct<std::optional<Format>>(format),
defaulted("," >> nonemptyList(ioControlSpec)) / ")", outputItemList) ||
construct<WriteStmt>(
"WRITE (" >> construct<std::optional<IoUnit>>(ioUnit),
construct<std::optional<Format>>(),
defaulted("," >> nonemptyList(ioControlSpec)) / ")",
outputItemList) ||
construct<WriteStmt>("WRITE" >> construct<std::optional<IoUnit>>(),
construct<std::optional<Format>>(),
parenthesized(nonemptyList(ioControlSpec)), outputItemList))
// R1212 print-stmt PRINT format [, output-item-list]
TYPE_CONTEXT_PARSER("PRINT statement"_en_US,
construct<PrintStmt>(
"PRINT" >> format, defaulted("," >> nonemptyList(outputItem))))
// R1215 format -> default-char-expr | label | *
// deprecated(ASSIGN): | scalar-int-name
TYPE_PARSER(construct<Format>(label / !"_."_ch) ||
construct<Format>(expr / !"="_tok) || construct<Format>(star))
// R1216 input-item -> variable | io-implied-do
TYPE_PARSER(construct<InputItem>(variable) ||
construct<InputItem>(indirect(inputImpliedDo)))
// R1217 output-item -> expr | io-implied-do
TYPE_PARSER(construct<OutputItem>(expr) ||
construct<OutputItem>(indirect(outputImpliedDo)))
// R1220 io-implied-do-control ->
// do-variable = scalar-int-expr , scalar-int-expr [, scalar-int-expr]
constexpr auto ioImpliedDoControl{loopBounds(scalarIntExpr)};
// R1218 io-implied-do -> ( io-implied-do-object-list , io-implied-do-control )
// R1219 io-implied-do-object -> input-item | output-item
TYPE_CONTEXT_PARSER("input implied DO"_en_US,
parenthesized(
construct<InputImpliedDo>(nonemptyList(inputItem / lookAhead(","_tok)),
"," >> ioImpliedDoControl)))
TYPE_CONTEXT_PARSER("output implied DO"_en_US,
parenthesized(construct<OutputImpliedDo>(
nonemptyList(outputItem / lookAhead(","_tok)),
"," >> ioImpliedDoControl)))
// R1222 wait-stmt -> WAIT ( wait-spec-list )
TYPE_CONTEXT_PARSER("WAIT statement"_en_US,
"WAIT" >>
parenthesized(construct<WaitStmt>(nonemptyList(Parser<WaitSpec>{}))))
// R1223 wait-spec ->
// [UNIT =] file-unit-number | END = label | EOR = label | ERR = label |
// ID = scalar-int-expr | IOMSG = iomsg-variable |
// IOSTAT = scalar-int-variable
constexpr auto idExpr{construct<IdExpr>(scalarIntExpr)};
TYPE_PARSER(first(construct<WaitSpec>(maybe("UNIT ="_tok) >> fileUnitNumber),
construct<WaitSpec>("END =" >> endLabel),
construct<WaitSpec>("EOR =" >> eorLabel),
construct<WaitSpec>("ERR =" >> errLabel),
construct<WaitSpec>("ID =" >> idExpr),
construct<WaitSpec>("IOMSG =" >> msgVariable),
construct<WaitSpec>("IOSTAT =" >> statVariable)))
constexpr auto bareUnitNumberAsList{
applyFunction(singletonList<PositionOrFlushSpec>,
construct<PositionOrFlushSpec>(fileUnitNumber))};
constexpr auto positionOrFlushSpecList{
parenthesized(nonemptyList(positionOrFlushSpec)) || bareUnitNumberAsList};
// R1224 backspace-stmt ->
// BACKSPACE file-unit-number | BACKSPACE ( position-spec-list )
TYPE_CONTEXT_PARSER("BACKSPACE statement"_en_US,
construct<BackspaceStmt>("BACKSPACE" >> positionOrFlushSpecList))
// R1225 endfile-stmt ->
// ENDFILE file-unit-number | ENDFILE ( position-spec-list )
TYPE_CONTEXT_PARSER("ENDFILE statement"_en_US,
construct<EndfileStmt>("END FILE" >> positionOrFlushSpecList))
// R1226 rewind-stmt -> REWIND file-unit-number | REWIND ( position-spec-list )
TYPE_CONTEXT_PARSER("REWIND statement"_en_US,
construct<RewindStmt>("REWIND" >> positionOrFlushSpecList))
// R1227 position-spec ->
// [UNIT =] file-unit-number | IOMSG = iomsg-variable |
// IOSTAT = scalar-int-variable | ERR = label
// R1229 flush-spec ->
// [UNIT =] file-unit-number | IOSTAT = scalar-int-variable |
// IOMSG = iomsg-variable | ERR = label
TYPE_PARSER(
construct<PositionOrFlushSpec>(maybe("UNIT ="_tok) >> fileUnitNumber) ||
construct<PositionOrFlushSpec>("IOMSG =" >> msgVariable) ||
construct<PositionOrFlushSpec>("IOSTAT =" >> statVariable) ||
construct<PositionOrFlushSpec>("ERR =" >> errLabel))
// R1228 flush-stmt -> FLUSH file-unit-number | FLUSH ( flush-spec-list )
TYPE_CONTEXT_PARSER("FLUSH statement"_en_US,
construct<FlushStmt>("FLUSH" >> positionOrFlushSpecList))
// R1231 inquire-spec ->
// [UNIT =] file-unit-number | FILE = file-name-expr |
// ACCESS = scalar-default-char-variable |
// ACTION = scalar-default-char-variable |
// ASYNCHRONOUS = scalar-default-char-variable |
// BLANK = scalar-default-char-variable |
// DECIMAL = scalar-default-char-variable |
// DELIM = scalar-default-char-variable |
// ENCODING = scalar-default-char-variable |
// ERR = label | EXIST = scalar-logical-variable |
// FORM = scalar-default-char-variable |
// FORMATTED = scalar-default-char-variable |
// ID = scalar-int-expr | IOMSG = iomsg-variable |
// IOSTAT = scalar-int-variable |
// NAME = scalar-default-char-variable |
// NAMED = scalar-logical-variable |
// NEXTREC = scalar-int-variable | NUMBER = scalar-int-variable |
// OPENED = scalar-logical-variable |
// PAD = scalar-default-char-variable |
// PENDING = scalar-logical-variable | POS = scalar-int-variable |
// POSITION = scalar-default-char-variable |
// READ = scalar-default-char-variable |
// READWRITE = scalar-default-char-variable |
// RECL = scalar-int-variable | ROUND = scalar-default-char-variable |
// SEQUENTIAL = scalar-default-char-variable |
// SIGN = scalar-default-char-variable |
// SIZE = scalar-int-variable |
// STREAM = scalar-default-char-variable |
// STATUS = scalar-default-char-variable |
// WRITE = scalar-default-char-variable
// @ | CARRIAGECONTROL = scalar-default-char-variable
// | CONVERT = scalar-default-char-variable
// | DISPOSE = scalar-default-char-variable
TYPE_PARSER(first(construct<InquireSpec>(maybe("UNIT ="_tok) >> fileUnitNumber),
construct<InquireSpec>("FILE =" >> fileNameExpr),
construct<InquireSpec>(
"ACCESS =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Access),
scalarDefaultCharVariable)),
construct<InquireSpec>(
"ACTION =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Action),
scalarDefaultCharVariable)),
construct<InquireSpec>(
"ASYNCHRONOUS =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Asynchronous),
scalarDefaultCharVariable)),
construct<InquireSpec>("BLANK =" >>
construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Blank),
scalarDefaultCharVariable)),
construct<InquireSpec>(
"DECIMAL =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Decimal),
scalarDefaultCharVariable)),
construct<InquireSpec>("DELIM =" >>
construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Delim),
scalarDefaultCharVariable)),
construct<InquireSpec>(
"DIRECT =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Direct),
scalarDefaultCharVariable)),
construct<InquireSpec>(
"ENCODING =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Encoding),
scalarDefaultCharVariable)),
construct<InquireSpec>("ERR =" >> errLabel),
construct<InquireSpec>("EXIST =" >>
construct<InquireSpec::LogVar>(
pure(InquireSpec::LogVar::Kind::Exist), scalarLogicalVariable)),
construct<InquireSpec>("FORM =" >>
construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Form), scalarDefaultCharVariable)),
construct<InquireSpec>(
"FORMATTED =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Formatted),
scalarDefaultCharVariable)),
construct<InquireSpec>("ID =" >> idExpr),
construct<InquireSpec>("IOMSG =" >>
construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Iomsg),
scalarDefaultCharVariable)),
construct<InquireSpec>("IOSTAT =" >>
construct<InquireSpec::IntVar>(pure(InquireSpec::IntVar::Kind::Iostat),
scalar(integer(variable)))),
construct<InquireSpec>("NAME =" >>
construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Name), scalarDefaultCharVariable)),
construct<InquireSpec>("NAMED =" >>
construct<InquireSpec::LogVar>(
pure(InquireSpec::LogVar::Kind::Named), scalarLogicalVariable)),
construct<InquireSpec>("NEXTREC =" >>
construct<InquireSpec::IntVar>(pure(InquireSpec::IntVar::Kind::Nextrec),
scalar(integer(variable)))),
construct<InquireSpec>("NUMBER =" >>
construct<InquireSpec::IntVar>(pure(InquireSpec::IntVar::Kind::Number),
scalar(integer(variable)))),
construct<InquireSpec>("OPENED =" >>
construct<InquireSpec::LogVar>(
pure(InquireSpec::LogVar::Kind::Opened), scalarLogicalVariable)),
construct<InquireSpec>("PAD =" >>
construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Pad), scalarDefaultCharVariable)),
construct<InquireSpec>("PENDING =" >>
construct<InquireSpec::LogVar>(
pure(InquireSpec::LogVar::Kind::Pending), scalarLogicalVariable)),
construct<InquireSpec>("POS =" >>
construct<InquireSpec::IntVar>(
pure(InquireSpec::IntVar::Kind::Pos), scalar(integer(variable)))),
construct<InquireSpec>(
"POSITION =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Position),
scalarDefaultCharVariable)),
construct<InquireSpec>("READ =" >>
construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Read), scalarDefaultCharVariable)),
construct<InquireSpec>(
"READWRITE =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Readwrite),
scalarDefaultCharVariable)),
construct<InquireSpec>("RECL =" >>
construct<InquireSpec::IntVar>(
pure(InquireSpec::IntVar::Kind::Recl), scalar(integer(variable)))),
construct<InquireSpec>("ROUND =" >>
construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Round),
scalarDefaultCharVariable)),
construct<InquireSpec>(
"SEQUENTIAL =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Sequential),
scalarDefaultCharVariable)),
construct<InquireSpec>("SIGN =" >>
construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Sign), scalarDefaultCharVariable)),
construct<InquireSpec>("SIZE =" >>
construct<InquireSpec::IntVar>(
pure(InquireSpec::IntVar::Kind::Size), scalar(integer(variable)))),
construct<InquireSpec>(
"STREAM =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Stream),
scalarDefaultCharVariable)),
construct<InquireSpec>(
"STATUS =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Status),
scalarDefaultCharVariable)),
construct<InquireSpec>(
"UNFORMATTED =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Unformatted),
scalarDefaultCharVariable)),
construct<InquireSpec>("WRITE =" >>
construct<InquireSpec::CharVar>(pure(InquireSpec::CharVar::Kind::Write),
scalarDefaultCharVariable)),
extension<LanguageFeature::Carriagecontrol>(
"nonstandard usage: CARRIAGECONTROL="_port_en_US,
construct<InquireSpec>("CARRIAGECONTROL =" >>
construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Carriagecontrol),
scalarDefaultCharVariable))),
extension<LanguageFeature::Convert>(
"nonstandard usage: CONVERT="_port_en_US,
construct<InquireSpec>(
"CONVERT =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Convert),
scalarDefaultCharVariable))),
extension<LanguageFeature::Dispose>(
"nonstandard usage: DISPOSE="_port_en_US,
construct<InquireSpec>(
"DISPOSE =" >> construct<InquireSpec::CharVar>(
pure(InquireSpec::CharVar::Kind::Dispose),
scalarDefaultCharVariable)))))
// R1230 inquire-stmt ->
// INQUIRE ( inquire-spec-list ) |
// INQUIRE ( IOLENGTH = scalar-int-variable ) output-item-list
TYPE_CONTEXT_PARSER("INQUIRE statement"_en_US,
"INQUIRE" >>
(construct<InquireStmt>(
parenthesized(nonemptyList(Parser<InquireSpec>{}))) ||
construct<InquireStmt>(construct<InquireStmt::Iolength>(
parenthesized("IOLENGTH =" >> scalar(integer(variable))),
nonemptyList(outputItem)))))
// R1301 format-stmt -> FORMAT format-specification
// 13.2.1 allows spaces to appear "at any point" within a format specification
// without effect, except of course within a character string edit descriptor.
TYPE_CONTEXT_PARSER("FORMAT statement"_en_US,
construct<FormatStmt>("FORMAT" >> Parser<format::FormatSpecification>{}))
// R1321 char-string-edit-desc
// N.B. C1313 disallows any kind parameter on the character literal.
constexpr auto charStringEditDesc{
space >> (charLiteralConstantWithoutKind || rawHollerithLiteral)};
// R1303 format-items -> format-item [[,] format-item]...
constexpr auto formatItems{
nonemptySeparated(space >> Parser<format::FormatItem>{}, maybe(","_tok))};
// R1306 r -> digit-string
constexpr DigitStringIgnoreSpaces repeat;
// R1304 format-item ->
// [r] data-edit-desc | control-edit-desc | char-string-edit-desc |
// [r] ( format-items )
TYPE_PARSER(construct<format::FormatItem>(
maybe(repeat), Parser<format::IntrinsicTypeDataEditDesc>{}) ||
construct<format::FormatItem>(
maybe(repeat), Parser<format::DerivedTypeDataEditDesc>{}) ||
construct<format::FormatItem>(Parser<format::ControlEditDesc>{}) ||
construct<format::FormatItem>(charStringEditDesc) ||
construct<format::FormatItem>(maybe(repeat), parenthesized(formatItems)))
// R1302 format-specification ->
// ( [format-items] ) | ( [format-items ,] unlimited-format-item )
// R1305 unlimited-format-item -> * ( format-items )
// minor extension: the comma is optional before the unlimited-format-item
TYPE_PARSER(parenthesized(construct<format::FormatSpecification>(
defaulted(formatItems / maybe(","_tok)),
"*" >> parenthesized(formatItems)) ||
construct<format::FormatSpecification>(defaulted(formatItems))))
// R1308 w -> digit-string
// R1309 m -> digit-string
// R1310 d -> digit-string
// R1311 e -> digit-string
constexpr auto width{repeat};
constexpr auto mandatoryWidth{construct<std::optional<int>>(width)};
constexpr auto digits{repeat};
constexpr auto noInt{construct<std::optional<int>>()};
constexpr auto mandatoryDigits{construct<std::optional<int>>("." >> width)};
// The extra trailing spaces in the following quoted edit descriptor token
// parsers are intentional: they inhibit any spurious warnings about missing
// spaces in pedantic mode that would otherwise be emitted if the edit
// descriptor were followed by a character that could appear in an identifier.
// R1307 data-edit-desc ->
// I w [. m] | B w [. m] | O w [. m] | Z w [. m] | F w . d |
// E w . d [E e] | EN w . d [E e] | ES w . d [E e] | EX w . d [E e] |
// G w [. d [E e]] | L w | A [w] | D w . d |
// DT [char-literal-constant] [( v-list )]
// (part 1 of 2)
TYPE_PARSER(construct<format::IntrinsicTypeDataEditDesc>(
"I " >> pure(format::IntrinsicTypeDataEditDesc::Kind::I) ||
"B " >> pure(format::IntrinsicTypeDataEditDesc::Kind::B) ||
"O " >> pure(format::IntrinsicTypeDataEditDesc::Kind::O) ||
"Z " >> pure(format::IntrinsicTypeDataEditDesc::Kind::Z),
mandatoryWidth, maybe("." >> digits), noInt) ||
construct<format::IntrinsicTypeDataEditDesc>(
"F " >> pure(format::IntrinsicTypeDataEditDesc::Kind::F) ||
"D " >> pure(format::IntrinsicTypeDataEditDesc::Kind::D),
mandatoryWidth, mandatoryDigits, noInt) ||
construct<format::IntrinsicTypeDataEditDesc>(
"E " >> ("N " >> pure(format::IntrinsicTypeDataEditDesc::Kind::EN) ||
"S " >> pure(format::IntrinsicTypeDataEditDesc::Kind::ES) ||
"X " >> pure(format::IntrinsicTypeDataEditDesc::Kind::EX) ||
pure(format::IntrinsicTypeDataEditDesc::Kind::E)),
mandatoryWidth, mandatoryDigits, maybe("E " >> digits)) ||
construct<format::IntrinsicTypeDataEditDesc>(
"G " >> pure(format::IntrinsicTypeDataEditDesc::Kind::G),
mandatoryWidth, mandatoryDigits, maybe("E " >> digits)) ||
construct<format::IntrinsicTypeDataEditDesc>(
"G " >> pure(format::IntrinsicTypeDataEditDesc::Kind::G) ||
"L " >> pure(format::IntrinsicTypeDataEditDesc::Kind::L),
mandatoryWidth, noInt, noInt) ||
construct<format::IntrinsicTypeDataEditDesc>(
"A " >> pure(format::IntrinsicTypeDataEditDesc::Kind::A), maybe(width),
noInt, noInt) ||
// PGI/Intel extension: omitting width (and all else that follows)
// Parse them just to get them to the I/O checker in semantics;
// they are not supported by the runtime.
extension<LanguageFeature::AbbreviatedEditDescriptor>(construct<
format::IntrinsicTypeDataEditDesc>(
"I " >> pure(format::IntrinsicTypeDataEditDesc::Kind::I) ||
("B "_tok / !letter /* don't occlude BN & BZ */) >>
pure(format::IntrinsicTypeDataEditDesc::Kind::B) ||
"O " >> pure(format::IntrinsicTypeDataEditDesc::Kind::O) ||
"Z " >> pure(format::IntrinsicTypeDataEditDesc::Kind::Z) ||
"F " >> pure(format::IntrinsicTypeDataEditDesc::Kind::F) ||
("D "_tok / !letter /* don't occlude DT, DC, & DP */) >>
pure(format::IntrinsicTypeDataEditDesc::Kind::D) ||
"E " >>
("N " >> pure(format::IntrinsicTypeDataEditDesc::Kind::EN) ||
"S " >> pure(format::IntrinsicTypeDataEditDesc::Kind::ES) ||
"X " >> pure(format::IntrinsicTypeDataEditDesc::Kind::EX) ||
pure(format::IntrinsicTypeDataEditDesc::Kind::E)) ||
"G " >> pure(format::IntrinsicTypeDataEditDesc::Kind::G) ||
"L " >> pure(format::IntrinsicTypeDataEditDesc::Kind::L),
noInt, noInt, noInt)))
// R1307 data-edit-desc (part 2 of 2)
// R1312 v -> [sign] digit-string
constexpr SignedDigitStringIgnoreSpaces scaleFactor;
TYPE_PARSER(construct<format::DerivedTypeDataEditDesc>(
"D T" >> defaulted(charLiteralConstantWithoutKind),
defaulted(parenthesized(nonemptyList(scaleFactor)))))
// R1314 k -> [sign] digit-string
constexpr PositiveDigitStringIgnoreSpaces count;
// R1313 control-edit-desc ->
// position-edit-desc | [r] / | : | sign-edit-desc | k P |
// blank-interp-edit-desc | round-edit-desc | decimal-edit-desc |
// @ \ | $
// R1315 position-edit-desc -> T n | TL n | TR n | n X
// R1316 n -> digit-string
// R1317 sign-edit-desc -> SS | SP | S
// R1318 blank-interp-edit-desc -> BN | BZ
// R1319 round-edit-desc -> RU | RD | RZ | RN | RC | RP
// R1320 decimal-edit-desc -> DC | DP
TYPE_PARSER(construct<format::ControlEditDesc>(
"T L " >> pure(format::ControlEditDesc::Kind::TL) ||
"T R " >> pure(format::ControlEditDesc::Kind::TR) ||
"T " >> pure(format::ControlEditDesc::Kind::T),
count) ||
construct<format::ControlEditDesc>(count,
"X " >> pure(format::ControlEditDesc::Kind::X) ||
"/" >> pure(format::ControlEditDesc::Kind::Slash)) ||
construct<format::ControlEditDesc>(
"X " >> pure(format::ControlEditDesc::Kind::X) ||
"/" >> pure(format::ControlEditDesc::Kind::Slash)) ||
construct<format::ControlEditDesc>(
scaleFactor, "P " >> pure(format::ControlEditDesc::Kind::P)) ||
construct<format::ControlEditDesc>(
":" >> pure(format::ControlEditDesc::Kind::Colon)) ||
"S " >> ("S " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::SS)) ||
"P " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::SP)) ||
construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::S))) ||
"B " >> ("N " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::BN)) ||
"Z " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::BZ))) ||
"R " >> ("U " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::RU)) ||
"D " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::RD)) ||
"Z " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::RZ)) ||
"N " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::RN)) ||
"C " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::RC)) ||
"P " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::RP))) ||
"D " >> ("C " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::DC)) ||
"P " >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::DP))) ||
extension<LanguageFeature::AdditionalFormats>(
"nonstandard usage: $ and \\ control edit descriptors"_port_en_US,
"$" >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::Dollar)) ||
"\\" >> construct<format::ControlEditDesc>(
pure(format::ControlEditDesc::Kind::Backslash))))
} // namespace Fortran::parser