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CMUCL supports extensions to the extended loop facility. The extension is similar to the for-as-hash and for-as-package loop forms allowing the user to process the codepoints or glyphs of a string.
‘(loop for cp being the codepoint of string ...)‘ extracts the
consecutive codepoints from the string, placing the codepoint in
cp. Allow codepoints, code-point, and
code-points as aliases of codepoint. Iteration stops when
there are no more codepoints in string.
‘(loop for g-string being the glyph of string ...)‘
extracts each glyph (as a string) from the string, placing the
glyph in g-string. Allow glpyhs
as an alias for glyph. Iteration stops when there are no more
glpyhs in string.