Commit Graph

10 Commits

Author SHA1 Message Date
Stephen Kelly 36eef302c0 Genex: Fix segfault when parsing ends with parameter expectation.
The extendResult method expects a non-empty parameters vector, as
assured by the normal case. Avoid calling the method when the parser
finds an incomplete generator expression, but has already entered
the state of expecting to find parameters.
2013-08-13 13:58:39 +02:00
Stephen Kelly b581be0767 Genex: Don't segfault on $<FOO,>
Treat the comma as part of the identifier here. It will later not
resolve to a generator expression and the user gets a proper error
message.
2012-11-27 09:12:39 -05:00
Stephen Kelly fd59b10e71 GenEx: Add some more asserts to verify code-sanity. 2012-10-17 16:21:13 -04:00
Stephen Kelly 6dd2b36559 GenEx: Break if there are no more commas in the container
This was causing an assert on Windows which has safety features for
iterating past the end of the container.
2012-10-17 16:21:13 -04:00
Stephen Kelly e7230c71fd GenEx: Fix termination bugs in generator expression parser.
Content which is incomplete as a generator expression could cause
segfaults by advancing an iterator beyond end() and dereferencing
it. Such incomplete generator expressions  should be treated as
plain text instead.
2012-10-17 16:21:12 -04:00
Stephen Kelly e2d141d474 GenEx: Parse colon after arguments separator colon specially.
The rationale is similar to that in commit b3d8f5da (GenEx: Parse comma
after colon tokens specially, 2012-10-04), in that colon tokens should
not be parsed as identifier-argument delimiters after the first colon.
2012-10-17 16:20:42 -04:00
Stephen Kelly b3d8f5dab7 GenEx: Parse comma after colon tokens specially
Otherwise the comma is treated as plain text by ParseContent.

$<STREQUAL:,> should be valid and true.
$<STREQUAL:,something> should be valid and false.

$<STREQUAL:,,> should be non-valid as it is 3 parameters.
$<STREQUAL:something,,> should be non-valid as it is 3 parameters.

Additionally, this allows reporting the correct error for other
expressions. For example $<TARGET_PROPERTY:,> should be invalid
because it has an empty target and empty property. It shouldn't
attempt to read the property ',' on the 'implicit this' target.
2012-10-09 08:26:43 -04:00
Stephen Kelly 4801eb6333 GenEx: It is not an error to specify an empty parameter
This is allowed by the CONFIG and STREQUAL expressions.
2012-10-09 08:26:32 -04:00
Stephen Kelly f20af79956 Handle colons as a special case in the generator expression parser.
Like the special case for commas, this ensures that the colon only has
special meaning as the delimiter between the identifier and the
parameters of a particular expression, but constructs such as

 INCLUDE_DIRECTORIES "$<1:C:\foo>"

are legal.
2012-09-21 11:33:46 +02:00
Stephen Kelly f1eacf0e07 cmGeneratorExpression: Re-write for multi-stage evaluation
The expressions may be parsed and then cached and evaluated multiple
times.  They are evaluated lazily so that literals such as ',' can be
treated as universal parameter separators, and can be processed from
results without appearing literally, and without interfering with the
parsing/evaluation of the entire expression.
2012-09-18 17:02:23 -04:00