nyacc: working on cpp issues
This commit is contained in:
Matt Wette
Jan Nieuwenhuizen
parent
d03ea06c84
commit
ea7f0b3a01
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@ -291,6 +291,7 @@
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(let* ((defs (cpi-defs info))
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(rhs (cpp-expand-text text defs))
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(exp (parse-cpp-expr rhs)))
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(simple-format #t "defs: ~S\n" defs)
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(eval-cpp-expr exp defs)))
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(lambda (key fmt . args)
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(report-error fmt args)
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@ -399,6 +400,37 @@
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(else (cons 'cpp-stmt stmt))))
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(define (eval-cpp-stmt-1/code stmt)
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;; eval control flow: states are {skip-look, keep, skip-done}
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(case (car stmt)
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((if)
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(let ((val (eval-cpp-cond-text (cadr stmt))))
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(simple-format #t "if ~S=> ~S\n" (cadr stmt) val)
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(if (not val) (p-err "unresolved: ~S" (cadr stmt)))
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(if (eq? 'keep (car ppxs))
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(if (zero? val)
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(set! ppxs (cons 'skip-look ppxs))
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(set! ppxs (cons 'keep ppxs)))
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(set! ppxs (cons 'skip-done ppxs)))))
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((elif)
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(let ((val (eval-cpp-cond-text (cadr stmt))))
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(simple-format #t "elif ~S=> ~S\n" (cadr stmt) val)
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(if (not val) (p-err "unresolved: ~S" (cadr stmt)))
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(case (car ppxs)
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((skip-look) (if (not (zero? val)) (set-car! ppxs 'keep)))
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((keep) (set-car! ppxs 'skip-done)))))
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((else)
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(simple-format #t "else (was ~S)\n" (car ppxs))
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(case (car ppxs)
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((skip-look) (set-car! ppxs 'keep))
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((keep) (set-car! ppxs 'skip-done))))
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((endif)
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(set! ppxs (cdr ppxs)))
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(else
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(if (eqv? 'keep (car ppxs))
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(eval-cpp-stmt-2/code stmt)))))
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(define (eval-cpp-stmt-2/code stmt)
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;; eval non-control flow
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(case (car stmt)
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;; actions
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((include)
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@ -408,35 +440,8 @@
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(push-input (open-input-file path))))
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((define) (add-define stmt))
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((undef) (rem-define (cadr stmt)))
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((error) (report-error "error: #error ~A" (cdr stmt)))
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((error) (p-err "error: #error ~A" (cadr stmt)))
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((pragma) #t) ;; ignore for now
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;; control flow: states are {skip-look, keep, skip-done}
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((if) ;; and ifdef ifndef
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(let ((val (eval-cpp-cond-text (cadr stmt))))
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;;(simple-format #t "if ~S=> ~S\n" (cadr stmt) val)
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(if (not val) (p-err "unresolved: ~S" (cadr stmt)))
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(if (eq? 'keep (car ppxs))
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(if (zero? val)
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(set! ppxs (cons 'skip-look ppxs))
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;; keep if keeping, skip if skipping, ??? if skip-look
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(set! ppxs (cons (car ppxs) ppxs)))
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(set! ppxs (cons 'skip-done ppxs)))))
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((elif)
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(let ((val (eval-cpp-cond-text (cadr stmt))))
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;;(simple-format #t "elif ~S=> ~S\n" (cadr stmt) val)
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(if (not val) (p-err "unresolved: ~S" (cadr stmt)))
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(if (eq? 'keep (car ppxs))
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(if (zero? val)
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(set! ppxs (cons 'skip-look ppxs))
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;; keep if keeping, skip if skipping, ??? if skip-look
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(set! ppxs (cons* (car ppxs) ppxs)))
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(set! ppxs (cons 'skip-done ppxs)))))
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((else)
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;;(simple-format #t "else\n")
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(if (eqv? 'skip-look (car ppxs))
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(set! ppxs (cons 'keep (cdr ppxs)))))
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((endif)
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(set! ppxs (cdr ppxs)))
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(else
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(error "bad cpp flow stmt"))))
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@ -511,10 +516,10 @@
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;; Loop between reading tokens and skipping tokens via CPP logic.
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(let iter ((pair (read-token)))
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;;(simple-format #t "iter ~S\n" (car ppxs)) (sleep 1)
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(simple-format #t "iter ~S\n" (car ppxs)) (sleep 1)
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(case (car ppxs)
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((keep)
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;;(simple-format #t "lx=>~S\n" pair)
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(simple-format #t "lx=>~S\n" pair)
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pair)
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((skip-done skip-look)
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(iter (read-token)))
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@ -29,6 +29,7 @@
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#:use-module (nyacc lex)
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#:use-module (nyacc lang util)
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#:use-module (rnrs arithmetic bitwise)
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#:use-module (ice-9 match)
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)
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(cond-expand
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@ -37,6 +38,28 @@
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(use-modules (ice-9 syncase)))
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(mes))
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(define c99-std-defs
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'("__DATE__" "__FILE__" "__LINE__" "__STDC__" "__STDC_HOSTED__"
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"__STDC_VERSION__" "__TIME__"))
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(define (c99-std-def? str)
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(let iter ((defs c99-std-defs))
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(cond
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((null? defs) #f)
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((string=? (car defs) str) #t)
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(else (iter (cdr defs))))))
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(define (c99-std-val str)
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(cond
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((string=? str "__DATE__") "M01 01 2001")
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((string=? str "__FILE__") "(unknown)")
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((string=? str "__LINE__") 0)
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((string=? str "__STDC__") 1)
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((string=? str "__STDC_HOSTED__") 0)
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((string=? "__STDC_VERSION__") 201701)
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((string=? "__TIME__") "00:00:00")
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(else #f)))
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;; @deffn read-ellipsis ch
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;; read ellipsis
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(define (read-ellipsis ch)
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@ -46,6 +69,9 @@
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(else #f)))
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;; @deffn cpp-define => (define (name "ADD") (args "X" "Y") (repl "X+Y"))
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;; output is like
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;; @code{(name "ABC") (repl "123")} or
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;; @code{(name "ABC") (args "X" "Y") (repl "X+Y")}
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(define (cpp-define)
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(define (p-args la) ;; parse args
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@ -66,7 +92,7 @@
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(define (p-rest la) ;; parse rest
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(cond ((eof-object? la) "")
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(else
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(if (not (char=? #\=)) (unread-char ch)) ; handle ABC=DEF
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(if (not (char=? #\=)) (unread-char la)) ; handle ABC=DEF
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(drain-input (current-input-port)))))
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(let* ((name (read-c-ident (skip-il-ws (read-char))))
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@ -77,44 +103,6 @@
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`(define (name ,name) (repl ,repl)))))
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;; where @code{...} is
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;; @code{(name "ABC") (repl "123")} or
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;; @code{(name "ABC") (args "X" "Y") (repl "X+Y")}
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(define (x-cpp-define)
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;; The (weak?) parse architecture is "unread la argument if no match"
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(letrec
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((p-cppd ;; parse all
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(lambda ()
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(let* ((iden (read-c-ident (skip-il-ws (read-char))))
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;; "define ABC(ARG)" not the same as "define ABC (ARG)"
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(args (or (p-args (read-char)) '()))
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(rest (p-rest (skip-il-ws (read-char)))))
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(if (pair? args)
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`(define (name ,iden) ,(cons 'args args) (repl ,rest))
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`(define (name ,iden) (repl ,rest))))))
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(p-args ;; parse args
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(lambda (la) ;; unread la if no match :(
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(if (eq? la #\()
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(let iter ((args '()) (la (skip-il-ws (read-char))))
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(cond
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((eq? la #\)) (reverse args))
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((read-c-ident la) =>
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(lambda (arg)
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(iter (cons arg args) (skip-il-ws (read-char)))))
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((read-ellipsis la) =>
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(lambda (arg)
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(iter (cons arg args) (skip-il-ws (read-char)))))
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((eq? la #\,)
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(iter args (skip-il-ws (read-char))))))
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(begin (if (char? la) (unread-char la)) #f)))) ;; CLEANUP
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(p-rest ;; parse rest
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(lambda (la)
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(cond ((eof-object? la) "")
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(else
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(if (not (char=? #\=)) (unread-char ch)) ; handle ABC=DEF
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(drain-input (current-input-port)))))))
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(p-cppd)))
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;; @deffn cpp-include
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;; Parse CPP include statement.
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(define (cpp-include)
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@ -162,51 +150,6 @@
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(list (cons 'len-v len-v) (cons 'pat-v pat-v) (cons 'rto-v rto-v)
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(cons 'mtab mtab) (cons 'act-v act-v))))
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;; Provide gen-cpp-lexer parse-cpp-expr eval-cpp-expr:
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;;(include-from-path "nyacc/lang/c99/cppbody.scm")
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;; --- last line ---
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;;; nyacc/lang/c99/cppbody.scm
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;;;
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;;; Copyright (C) 2016-2017 Matthew R. Wette
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;;;
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;;; This program is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation, either version 3 of the License, or
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;;; (at your option) any later version.
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;;;
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;;; This program is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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(use-modules (ice-9 match))
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(define c99-std-defs
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'("__DATE__" "__FILE__" "__LINE__" "__STDC__" "__STDC_HOSTED__"
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"__STDC_VERSION__" "__TIME__"))
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(define (c99-std-def? str)
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(let iter ((defs c99-std-defs))
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(cond
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((null? defs) #f)
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((string=? (car defs) str) #t)
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(else (iter (cdr defs))))))
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(define (c99-std-val str)
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(cond
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((string=? str "__DATE__") "M01 01 2001")
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((string=? str "__FILE__") "(unknown)")
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((string=? str "__LINE__") 0)
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((string=? str "__STDC__") 1)
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((string=? str "__STDC_HOSTED__") 0)
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((string=? "__STDC_VERSION__") 201701)
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((string=? "__TIME__") "00:00:00")
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(else #f)))
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(define (cpp-err fmt . args)
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(apply throw 'cpp-error fmt args))
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@ -489,6 +432,12 @@
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(cond
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((not rval) #f)
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((string=? rval "C99_ANY") #f) ; don't expand: could be anything
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;; move FILE LINE to expand-cpp-repl?
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((string=? rval "__FILE__")
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(string-append "\"" (or (port-filename (current-input-port))
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"(unknown)") "\""))
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((string=? rval "__LINE__") (1+ (port-line (current-input-port))))
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;;
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((member ident used) ident)
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((string? rval)
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(let ((expd (expand-cpp-repl rval '() dict (cons ident used))))
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