dmd.chkformat - D Programming Language

Menu

- Learn
- Documentation
  - Language Reference
  - Library Reference
  - Command-line Reference
  - Feature Overview
  - Articles
- Downloads
- Packages
- Community
  - Blog
  - Orgs using D
  - Twitter
  - Calendar
  - Forums
  - IRC
  - Community Discord
  - Wiki
  - GitHub
  - Issues
  - Get involved
  - Contributors
  - Foundation
  - Security Team
  - Donate
  - Sponsors
- Resources
  - Tour
  - Books
  - Tutorials
  - Tools
  - Editors
  - IDEs
  - run.dlang.io
  - Visual D
  - Acknowledgments
  - D Style
  - Glossary
  - Sitemap

Search
Report a bug
If you spot a problem with this page, click here to create a Bugzilla issue.
Improve this page
Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using a local clone.

# dmd.chkformat

Check the arguments to printf and scanf against the format string.
Compiler implementation of the D programming language.
Authors:
Walter Bright
License:
Boost License 1.0

Source chkformat.d

Documentation https://dlang.org/phobos/dmd_chkformat.html

Coverage https://codecov.io/gh/dlang/dmd/src/master/src/dmd/chkformat.d

bool `checkPrintfFormat`(ref const Loc `loc`, scope const char[] `format`, scope Expression[] `args`);
  Check that arguments to a printf format string are compatible with that string. Issue errors for incompatibilities.
  Follows the C99 specification for printf.
  Takes a generous, rather than strict, view of compatiblity. For example, an unsigned value can be formatted with a signed specifier.
  Diagnosed incompatibilities are:
  1. incompatible sizes which will cause argument misalignment 2. deferencing arguments that are not pointers 3. insufficient number of arguments 4. struct arguments 5. array and slice arguments 6. non-pointer arguments to s specifier 7. non-standard formats 8. undefined behavior per C99
  Per the C Standard, extra arguments are ignored.
  No attempt is made to fix the arguments or the format string.
  Returns:
  true if errors occurred

  References C99 7.19.6.1 http://www.cplusplus.com/reference/cstdio/printf/

bool `checkScanfFormat`(ref const Loc `loc`, scope const char[] `format`, scope Expression[] `args`);
  Check that arguments to a scanf format string are compatible with that string. Issue errors for incompatibilities.
  Follows the C99 specification for scanf.
  Takes a generous, rather than strict, view of compatiblity. For example, an unsigned value can be formatted with a signed specifier.
  Diagnosed incompatibilities are:
  1. incompatible sizes which will cause argument misalignment 2. deferencing arguments that are not pointers 3. insufficient number of arguments 4. struct arguments 5. array and slice arguments 6. non-standard formats 7. undefined behavior per C99
  Per the C Standard, extra arguments are ignored.
  No attempt is made to fix the arguments or the format string.
  Returns:
  true if errors occurred

  References C99 7.19.6.2 http://www.cplusplus.com/reference/cstdio/scanf/

Copyright © 1999-2020 by the D Language Foundation | Page generated by Ddoc on Sun Mar 8 02:30:04 2020