QuoteRef: wegbB_1971 ;;254 can thoroughly intermix compiled and interpretive code

QuoteRef: wegbB_1971 ;;255 basic ideas- extension mechanisms, sustained variability (i.e. can modify system behavior), bootstrapping, uniformity

QuoteRef: wegbB_1971 ;;257 Any symbols may be an identifier eg "#&"

QuoteRef: wegbB_1971 ;;257 any id can be an infix operator, prefix operator, id or all (context)

QuoteRef: wegbB_1971 ;;257 ECL allows extensive changes to parse tables

258 ;;Quote: EL1 included parameterized mode generation routines for defining new data types

QuoteRef: wegbB_1971 ;;258 automatic garbage collection returned into list of 2**n--tables of how big each object is and where pointers located

QuoteRef: wegbB_1971 ;;258 treats procedure as a mode (like integers)

259 ;;Quote: a program consists of a large number of variables, a few constants, and some punctuation to paste this all together

259 ;;Quote: allow anything to be part of a mode declaration, e.g., a field that returns the number of leading zero's

QuoteRef: wegbB_1971 ;;260 frozen list eg if foo (a,b,c) is a foomode procedure and foomode is frozen then know its data type i.e. type of arguments and result

QuoteRef: wegbB_1971 ;;260 compilation with frozen list of invariants (compile time determinable)

260 ;;Quote: handle errors and interrupts by a procedure for jumping to any label, or exiting any called procedure and returning a value

QuoteRef: wegbB_1971 ;;261 in ECL have complete access to variables in previous levels using DYB(var_name, procedure_level)