Commands are provided to insert and format the major REDUCE language
structures; currently block or compound (begin … end),
group (<< … >>) and conditional (if … then
… else …) statements are supported. By default they are
formatted to be multi-line. If given a prefix argument, the commands to
insert block and group statements (composites) format them on a single
line (appropriate in some very simple cases).
If there is text on the line after where a composite is inserted then it is moved into the body of the composite; if transient mark mode is on and the mark is active then the whole region is moved into the composite; the composite is then re-indented.
The cursor is left in place to enter the body statements of a group,
whereas a block is inserted complete with an empty scalar
declaration and the cursor is left in place to enter the names of the
scalar variables.
Insert and indent a begin scalar ; … end block and position
point inside. With an argument put begin and end on the
same line.
Insert and indent a << … >> group and position point
inside. With an argument put << and >> on the same line.
Insert if … then and position point inside. With argument
include a correctly indented else on a second line.
Probably the easiest way to access these templates from the keyboard is not directly as described above but via the generalized completion facilities described in the next chapter. See Keyword completion and abbreviation expansion.