@|commentify-argument-names| to the argument list of the given type.
\end{describe}
+\begin{describe}{fun}
+ {pprint-c-function-type @<return-type> @<stream>
+ @<print-args> @<print-kernel>}
+ Provides the top-level structure for printing C function types.
+
+ Output is written to @<stream> to describe a function type returning
+ @<return-type>, whose declarator kernel (containing the name, and any
+ further type operands) will be printed by @<print-kernel>, and whose
+ arguments, if any, will be printed by @<print-args>.
+
+ The @<print-kernel> function is a standard kernel-printing function
+ following the \descref{pprint-c-type}[protocol]{gf}.
+
+ The @<print-args> function is given a single argument, which is the
+ @<stream> to print on. It should not print the surrounding parentheses.
+
+ The output written to @<stream> looks approximately like
+ \begin{prog}
+ @<return-type> @<kernel>(@<args>)
+ \end{prog}
+\end{describe}
+
+\begin{describe}{fun}{pprint-argument-list @<args> @<stream> @> @<flag>}
+ Print an argument list to @<stream>.
+
+ The @<args> is a list of \descref{argument}[objects]{cls}, optionally
+ containing an @|:ellipsis| marker. The function returns true if any
+ arguments were actually printed.
+\end{describe}
+
\subsection{Parsing C types} \label{sec:clang.c-types.parsing}
;; C syntax output protocol.
+(export 'pprint-c-function-type)
+(defun pprint-c-function-type (return-type stream print-args print-kernel)
+ "Common top-level printing for function types.
+
+ Prints RETURN-TYPE (KERNEL(ARGS)), where RETURN-TYPE is the actual return
+ type, and ARGS and KERNEL are whatever is printed by the PRINT-ARGS and
+ PRINT-KERNEL functions.
+
+ The PRINT-KERNEL function is the standard such thing for the
+ `pprint-c-type' protocol; PRINT-ARGS accepts just an output stream."
+ (pprint-c-type return-type stream
+ (lambda (stream prio spacep)
+ (maybe-in-parens (stream (> prio 2))
+ (when spacep (c-type-space stream))
+ (funcall print-kernel stream 2 nil)
+ (pprint-indent :block 4 stream)
+ (pprint-logical-block
+ (stream nil :prefix "(" :suffix ")")
+ (funcall print-args stream))))))
+
+(export 'pprint-argument-list)
+(defun pprint-argument-list (args stream)
+ "Print an argument list.
+
+ The ARGS is a list of `argument' objects, optionally containing an
+ `:ellipsis' marker. The output is written to STREAM.
+
+ Returns non-nil if any arguments were actually printed."
+ (let ((anyp nil))
+ (pprint-logical-block (stream nil)
+ (dolist (arg args)
+ (if anyp
+ (format stream ", ~_")
+ (setf anyp t))
+ (etypecase arg
+ ((member :ellipsis)
+ (write-string "..." stream))
+ (argument
+ (pprint-logical-block (stream nil)
+ (pprint-c-type (argument-type arg) stream
+ (argument-name arg)))))))
+ anyp))
+
(let ((void-arglist (list (make-argument nil c-type-void))))
(defmethod pprint-c-type ((type c-function-type) stream kernel)
- (pprint-c-type (c-type-subtype type) stream
- (lambda (stream prio spacep)
- (maybe-in-parens (stream (> prio 2))
- (when spacep (c-type-space stream))
- (funcall kernel stream 2 nil)
- (pprint-indent :block 4 stream)
- (pprint-logical-block
- (stream nil :prefix "(" :suffix ")")
- (let ((firstp t))
- (dolist (arg (or (c-function-arguments type)
- void-arglist))
- (if firstp
- (setf firstp nil)
- (format stream ", ~_"))
- (if (eq arg :ellipsis)
- (write-string "..." stream)
- (pprint-c-type (argument-type arg)
- stream
- (argument-name arg)))))))))))
+ (let ((args (or (c-function-arguments type) void-arglist)))
+ (pprint-c-function-type (c-type-subtype type) stream
+ (lambda (stream)
+ (pprint-argument-list args stream))
+ kernel))))
;; S-expression notation protocol.