Doing this for variable *nodes* was breaking in extremely specific
circumstances:
* A null node is passed into setVariable() and, if source maps are
enabled, recorded in _variableNodes.
* Later on, getVariableNode() is called for that variable. Because
that variable's node is null, it calls
_getVariableNodeFromGlobalModule() even though the variable is
actually defined.
* _getVariableNodeFromGlobalModule() sets _lastVariableIndex to 0 on
the assumption that the variable is undefined, which turns out to be
incorrect in this specific case.
The next commit will fix the issue where a null node can be passed
into setVariable() when source maps are enabled, but it makes more
sense to assign the variable index to 0 in the variable access anyway,
since it happens first and isn't skipped when source maps are
disabled.
This also adds a test to verify that all YAML files are valid. Travis
won't run tests at all if its YAML is invalid, but this way Appveyor
can warn about broken Travis config and vice versa, and a local test
run will warn about either.
For any @errors encountered in mixins or functions, use the call-site
(instead of the @error rule) as the span printed in the error message.
Closes#474
See sass/sass-spec#1494
We now wrap _withStackFrame() around wider sections of code, including
_loadStylesheet() which handles parse errors, so that the @use/@import
stack frames are available.
In addition to being useful for users of Sass, this will make it
possible for core Sass functions to produce warnings without needing
an explicit reference to the evaluator.
The automatic @charset adding is useful in general, but there are
consistently cases where it trips up naïve downstream tools. This
option makes it easier for users to control when it occurs.
This adds a --no-unicode option to disable Unicode span rendering,
decouples repl highlighting from SourceSpan.highlight, and updates
tests to work with the new error highlighting.
It also tightly scopes source spans for statements with children.
Previously, source spans for these nodes extended all the way through
any whitespace that followed the node. This led to messy-looking
multiline span highlights with dart-lang/source_span#25.
Now, StylesheetParser.children doesn't consume trailing whitespace.
Instead, we add a helper method StylesheetParser._withChildren that
parses children, creates the appropriate span, and then consumes the
trailing whitespace.
