add stdlib::column and stdlib::line
fix some typing rules / make them more generic
allow specifying an entryType of MatrixInits and MatrixTypes
handle matrix entry types when typing
temporarily disable entry type deduction for MatrixInit
add generic wildcard to Matrix references
make sure matrix entry type matches specified type
add syntax for working with rational numbers
check: fractions must not have denominator 0
adapt typing rules to rational numbers
add class to manage rational numbers
Validation: fix assignability check
add RationalMatrix class
rename parser rules to "Rational*" to match core classes
adjust expression interpretation to rational numbers and matrices
fix label provider for new matrix entries
validation: also check placeholder expression in matrices
SmartMatrixType: remove no longer needed equals() implementation