Iterating a JSON array with GET re-parses the entire string on every
call, so walking N elements is O(N^2). ARRAY_SPLIT parses the array
once and returns its elements as a CMake list, letting each element be
queried individually in linear total time.
Each element is re-serialized as compact JSON and encoded to survive
CMake list parsing: '[' and ']' inside strings are emitted as \u005B
and \u005D, and ';' is escaped as '\;'. Every element therefore stays
valid, re-queryable JSON.
Fixes: #27985
This was broken by refactoring in commit dab5e6ebb1 (introduce
cm::CMakeString class as helper for string() command, 2025-10-06,
v4.3.0-rc1~510^2~2).
Fixes: #27749
Since commit 13c7bb5b0c (cmGeneratorExpression: Update strip function to
collect parsed expressions, 2025-04-08), the logic to strip generator
expressions from a string made incorrect assumptions about the contents of
generator expressions, leading certain cases to be stripped incorrectly.
Clean up the logic and fix broken behavior, and add test coverage with
`string(GENEX_STRIP)`.
Fixes: #27133
a760a74abf Tests: Optionally skip tests requiring 64-bit time_t
14e21fa992 bootstrap: Compile with 64-bit time_t on 32-bit Linux if possible
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !10951
Extend commit 5b10f96793 (Linux: Compile with _FILE_OFFSET_BITS=64 on
32-bit Linux, 2020-09-23, v3.19.0-rc1~112^2) to cover `time_t` too,
by compiling with `_TIME_BITS=64`.
`difftime` returns a `double`, so commit 6727270b75 (CMake: Extend
TIMESTAMP sub-commands with new unix time format specifier, 2016-02-16,
v3.6.0-rc1~338^2) cast it to `long` to get an integer result. However,
in the MSVC ABI, `long` is a 32-bit integer. Use an explicit 64-bit
integer type instead.
Fixes: #26716
The semantics mimic other languages like Python, Java, JS, etc.
To advance past a zero-length match, the search algorithm first
tries to find a non-zero alternative branch. If that fails, it
force-advances by 1 character.
Fixes: #13790, #13792, #18690, #26629
When doing successive matches, track the input start and current search
start positions separately to prevent the `^` anchor from matching in
the middle of the string. Add policy CMP0186 to provide compatibility.
Issue: #26629Fixes: #16899
Adds a set of sub commands to the string command for parsing JSON, the
JSON commands are: GET, TYPE, MEMBER, LENGTH, REMOVE, SET, and EQUAL.
Closes: #19501
When `string(REGEX REPLACE)` or `string(REGEX MATCHALL)` loop
internally, they store their matches, but they do not clear the previous
match from an earlier iteration. This can leave the contents of
`CMAKE_MATCH_<N>` with bogus values for later matches in the string if
they have groups which earlier matched a non-empty string, but now match
an empty string.
Fixes#17079.
Add a string(CONCAT) command to simply concatenate input arguments
together. This will be useful for combining strings from different
quoting syntaxes. Add a RunCMake.string test covering these cases.
Daksh Mamodiya
Marc Chevrier
Brad King
Martin Duffy
Nikita Nemkin
Peter Steneteg
Kyle Edwards
Alex Turbov
Sylvain Joubert
Ben Boeckel
Bernhard M. Wiedemann
Daniel Pfeifer
Justin Borodinsky
Nils Gladitz