[Swift-devel] printing and library functions

[Ben Clifford]

the need for better progress monitoring of a run doesn't necessarily 
correspond with a need for more output primitives in the language.

there are lots of other possibilities. For example (not that I 
particularly like it, but its a radical departure from seq/printf so 
illustrates my point), imagine your source code appearing in a window with 
every for loop and dataset declaration annoted (in colour or text) by its 
state/progress.

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