16.3 Missing Features

This section lists features we know are missing from g77, and which we want to add someday. (There is no priority implied in the ordering below.)

GNU Fortran language:

16.3.1 Better Source Model
16.3.2 Fortran 90 Support
16.3.3 Intrinsics in PARAMETER Statements
16.3.4 Arbitrary Concatenation
16.3.5 SELECT CASE on CHARACTER Type
16.3.6 RECURSIVE Keyword
16.3.8 Popular Non-standard Types
16.3.9 Full Support for Compiler Types
16.3.10 Array Bounds Expressions
16.3.11 POINTER Statements
16.3.12 Sensible Non-standard Constructs
16.3.13 READONLY Keyword
16.3.14 FLUSH Statement
16.3.15 Expressions in FORMAT Statements
16.3.16 Explicit Assembler Code
16.3.17 Q Edit Descriptor

GNU Fortran dialects:

16.3.18 Old-style PARAMETER Statements
16.3.19 TYPE and ACCEPT I/O Statements
16.3.20 STRUCTURE, UNION, RECORD, MAP
16.3.21 OPEN, CLOSE, and INQUIRE Keywords
16.3.22 ENCODE and DECODE
16.3.23 AUTOMATIC Statement
16.3.24 Suppressing Space Padding of Source Lines
16.3.25 Fortran Preprocessor
16.3.26 Bit Operations on Floating-point Data
16.3.27 Really Ugly Character Assignments

New facilities:

16.3.28 POSIX Standard
16.3.29 Floating-point Exception Handling
16.3.30 Nonportable Conversions
16.3.31 Large Automatic Arrays
16.3.32 Support for Threads
16.3.7 Increasing Precision/Range
16.3.33 Enabling Debug Lines

Better diagnostics:

16.3.34 Better Warnings
16.3.35 Gracefully Handle Sensible Bad Code
16.3.36 Non-standard Conversions
16.3.37 Non-standard Intrinsics
16.3.38 Modifying DO Variable
16.3.39 Better Pedantic Compilation
16.3.40 Warn About Implicit Conversions
16.3.41 Invalid Use of Hollerith Constant
16.3.42 Dummy Array Without Dimensioning Dummy
16.3.43 Invalid FORMAT Specifiers
16.3.44 Ambiguous Dialects
16.3.45 Unused Labels
16.3.46 Informational Messages

Run-time facilities:

16.3.47 Uninitialized Variables at Run Time
16.3.48 Portable Unformatted Files
16.3.49 Better List-directed I/O
16.3.50 Default to Console I/O

Debugging:

16.3.51 Labels Visible to Debugger