ANSI Common Lisp 3 Evaluation and Compilation 3.2 Compilation 3.2.3 File Compilation
18.104.22.168 Processing of Top Level Forms
Processing of top level forms in the file compiler is defined
- 1. If the form is a compiler macro form
(not disabled by a notinline declaration),
the implementation might or might not choose to compute
the compiler macro expansion of the form and,
having performed the expansion, might or might not choose to process the result
as a top level form in the same processing mode
(compile-time-too or not-compile-time).
If it declines to obtain or use the expansion, it must process the original form.
- 2. If the form is a macro form,
its macro expansion is computed and processed as a
top level form in
the same processing mode (compile-time-too or not-compile-time).
- 3. If the form is a progn form, each of its
body forms is sequentially processed as a
top level form in the same processing mode.
- 4. If the form is a locally,
macrolet, or symbol-macrolet,
compile-file establishes the appropriate bindings and processes the
body forms as top level forms with those bindings in effect
in the same processing mode. (Note that this implies that the lexical
environment in which top level forms are processed
is not necessarily the null lexical environment.)
- 5. If the form is an eval-when form, it is
handled according to the next figure.
Column CT indicates whether :compile-toplevel is specified.
Column LT indicates whether :load-toplevel is specified.
Column E indicates whether :execute is specified.
Column Mode indicates the processing mode;
a dash ( - ) indicates that the processing mode is not relevant.
The Action column specifies one of three actions:
The New Mode column indicates the new processing mode.
A dash ( - ) indicates the compiler remains in its current mode.
- 6. Otherwise, the form is a top level form that
is not one of the special cases. In compile-time-too mode, the
compiler first evaluates the form in the evaluation
environment and then minimally compiles it. In not-compile-time
mode, the form is simply minimally compiled. All subforms
are treated as non-top-level forms.
Note that top level forms are processed in the order in
which they textually appear in the file and that each
top level form read by the compiler is processed before the next is
read. However, the order of processing (including macro expansion) of
subforms that are not top level forms and the order of
further compilation is unspecified as long as Common Lisp semantics
eval-when forms cause compile-time evaluation only at
top level. Both :compile-toplevel and :load-toplevel situation specifications
are ignored for non-top-level forms. For non-top-level forms,
specifying the :execute situation is treated as an implicit progn
including the forms in the body of the eval-when form;
otherwise, the forms in the body are ignored.
22.214.171.124.1 Processing of Defining Macros
126.96.36.199.2 Constraints on Macros and Compiler Macros