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| author | Alex Richardson <Alexander.Richardson@cl.cam.ac.uk> | 2020-05-27 15:13:42 +0100 |
|---|---|---|
| committer | Alex Richardson <Alexander.Richardson@cl.cam.ac.uk> | 2020-05-27 16:31:39 +0100 |
| commit | 3be5e53f208d63135bb4e8499abdc1ac8a2b3266 (patch) | |
| tree | 9ff1a65cad37aa549f62150d86d6ecb88ea377c4 /llvm/docs/CommandGuide/FileCheck.rst | |
| parent | 461af57de78155ee5d1dc1969b81dd019d228538 (diff) | |
| download | llvm-3be5e53f208d63135bb4e8499abdc1ac8a2b3266.zip llvm-3be5e53f208d63135bb4e8499abdc1ac8a2b3266.tar.gz llvm-3be5e53f208d63135bb4e8499abdc1ac8a2b3266.tar.bz2 | |
[FileCheck] Allow parenthesized expressions
With this change it is be possible to write FileCheck expressions such
as [[#(VAR+1)-2]]. Currently, the only supported arithmetic operators are
plus and minus, so this is not particularly useful yet. However, it our
CHERI fork we have tests that benefit from having multiplication in
FileCheck expressions. Allowing parenthesized expressions is the simplest
way for us to work around the current lack of operator precedence in
FileCheck expressions.
Reviewed By: thopre, jhenderson
Differential Revision: https://reviews.llvm.org/D77383
Diffstat (limited to 'llvm/docs/CommandGuide/FileCheck.rst')
| -rw-r--r-- | llvm/docs/CommandGuide/FileCheck.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/docs/CommandGuide/FileCheck.rst b/llvm/docs/CommandGuide/FileCheck.rst index 7d9a69e..d8a2e34 100644 --- a/llvm/docs/CommandGuide/FileCheck.rst +++ b/llvm/docs/CommandGuide/FileCheck.rst @@ -694,6 +694,8 @@ The syntax of a numeric substitution is ``[[#%<fmtspec>,<expr>]]`` where: A numeric operand is a previously defined numeric variable, or an integer literal. The supported operators are ``+`` and ``-``. Spaces are accepted before, after and between any of these elements. + There is currently no support for operator precendence, but parentheses can + be used to change the evaluation order. For example: |