void MathMacro::validate(LaTeXFeatures & features) const
{
+ // Immediately after a document is loaded, in some cases the MacroData
+ // of the global macros defined in the lib/symbols file may still not
+ // be known to the macro machinery because it will be set only after
+ // the first call to updateMacros(). This is not a problem unless
+ // instant preview is on for math, in which case we will be missing
+ // the corresponding requirements.
+ // In this case, we get the required info from the global macro table.
if (!d->requires_.empty())
features.require(d->requires_);
+ else if (!d->macro_) {
+ // Update requires for known global macros.
+ MacroData const * data = MacroTable::globalMacros().get(name());
+ if (data && !data->requires().empty())
+ features.require(data->requires());
+ }
if (name() == "binom")
features.require("binom");