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QuoteRef: grisRE4_1980
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ThesaHelp:
references g-h
ThesaHelp:
ACM references f-l
Topic:
pattern matching
Topic:
understanding systems
Topic:
pattern brackets
Topic:
accessing a sequence
Topic:
pattern components
Topic:
access by current position
Topic:
string operations
Topic:
current position in a user interface; cursor
Topic:
backtracking
Topic:
control returning functions and expressions
Topic:
failure returning functions and expressions
Topic:
sequence generators
Topic:
restricted use of global variables
Reference
Griswold, R.E., Hanson, D.R., "An alternative to the use of patterns in string processing", ACM Transactions on Programming languages and systems, 2, 2, pp. 153-172, April 1980. Google
157 ;;Quote: pattern matching in SNOBOL4 can be very arcane, even to the point of needing the system's source listings
161 ;;Quote: instead of constructing patterns, Icon uses 'scan s using e' to establish a context for pattern matching by e
161 ;;Quote: Icon numbers the positions between characters, from either end of the string
162 ;;Quote: the 'upto(...)' operation in Icon, scans until the first occurrence of a letter
162 ;;Quote: in Icon, set the current subject and cursor position by setting variables; programs often set them explicitly
163 ;;Quote: in Icon, use 'move' and 'tab' to move cursor and return the intervening substring
163 ;;Quote: Icon has scanning operations for upto©, many©, any©, find(s), match(s), &, |
163 ;;Quote: Icon's scanning operation for balanced characters specifies left and right sets and following characters
165 ;;Quote: in Icon, tab (10|5) == tab(10)|tab(5) because a failure of tab(10) invokes the alternative value
165 ;;Quote: an Icon generator is an operation that returns alternative values when the first value fails
165 ;;Quote: the Icon scanning operation, upto©, is a generator that returns values until the expression succeeds
167 ;;Quote: unlike SNOBOL4, Icon allows matching procedures in the form of a generator; returns a value when 'suspend' is done
169 ;;Quote: Icon uses two globals &subject and &pos heavily, causes trouble but is also convenient
ThesaHelp: references g-h (299 items)
ThesaHelp: ACM references f-l (241 items)
Topic: pattern matching (42 items)
Topic: understanding systems (48 items)
Topic: pattern brackets (15 items)
Topic: accessing a sequence (9 items)
Topic: pattern components (15 items)
Topic: access by current position (7 items)
Topic: string operations (20 items)
Topic: current position in a user interface; cursor (23 items)
Topic: backtracking (30 items)
Topic: control returning functions and expressions (6 items)
Topic: failure returning functions and expressions (24 items)
Topic: sequence generators (16 items)
Topic: restricted use of global variables (22 items)