|
|
@@ -543,7 +543,7 @@ The pattern is not the same thing as a quasiquote expression used to
|
|
|
\emph{construct} ASTs, however, the similarity is intentional: constructing and
|
|
|
deconstructing ASTs uses similar syntax.
|
|
|
%
|
|
|
-While the pattern uses a restricted syntax,
|
|
|
+While the pattern uses a restricted syntax,
|
|
|
the body of the match clause may contain any Racket code whatsoever.
|
|
|
|
|
|
|
|
|
@@ -574,7 +574,7 @@ S-expression to see if it is a machine-representable integer.
|
|
|
\vrule
|
|
|
\begin{minipage}{0.25\textwidth}
|
|
|
\begin{lstlisting}
|
|
|
-
|
|
|
+
|
|
|
|
|
|
|
|
|
|
|
|
@@ -618,11 +618,11 @@ $R_0$ program.
|
|
|
[`(- ,e) (exp? e)]
|
|
|
[`(+ ,e1 ,e2)
|
|
|
(and (exp? e1) (exp? e2))]
|
|
|
- [else #f]))
|
|
|
+ [else #f]))
|
|
|
|
|
|
(define (R0? sexp)
|
|
|
(match sexp
|
|
|
- [`(program ,e) (exp? e)]
|
|
|
+ [`(program ,e) (exp? e)]
|
|
|
[else #f]))
|
|
|
|
|
|
(R0? `(program (+ (read) (- 8))))
|
|
|
@@ -638,7 +638,7 @@ $R_0$ program.
|
|
|
|
|
|
|
|
|
|
|
|
-
|
|
|
+
|
|
|
|
|
|
|
|
|
|
|
|
@@ -1035,7 +1035,7 @@ to the variable, then evaluates the body of the \key{let}.
|
|
|
(fx- 0 v)]
|
|
|
[`(+ ,(app (interp-exp env) v1) ,(app (interp-exp env) v2))
|
|
|
(fx+ v1 v2)])))
|
|
|
-
|
|
|
+
|
|
|
(define (interp-R1 env)
|
|
|
(lambda (p)
|
|
|
(match p
|
|
|
@@ -1237,7 +1237,7 @@ main:
|
|
|
addq -8(%rbp), %rax
|
|
|
movq %rax, %rdi
|
|
|
callq print_int
|
|
|
-
|
|
|
+
|
|
|
addq $16, %rsp
|
|
|
movq $0, %rax
|
|
|
popq %rbp
|
|
|
@@ -1319,7 +1319,7 @@ next. )
|
|
|
(\key{subq} \; \Arg\; \Arg) \mid
|
|
|
(\key{movq} \; \Arg\; \Arg) \mid
|
|
|
(\key{retq})\\
|
|
|
- &\mid& (\key{negq} \; \Arg) \mid
|
|
|
+ &\mid& (\key{negq} \; \Arg) \mid
|
|
|
(\key{callq} \; \mathit{label}) \mid
|
|
|
(\key{pushq}\;\Arg) \mid
|
|
|
(\key{popq}\;\Arg) \\
|
|
|
@@ -3235,7 +3235,6 @@ the order of evaluation of its arguments.
|
|
|
(match cnd
|
|
|
[#t (recur thn)]
|
|
|
[#f (recur els)])]
|
|
|
- [`(not ,(app recur v)) (match v [#t #f] [#f #t])]
|
|
|
[`(and ,(app recur v1) ,e2)
|
|
|
(match v1
|
|
|
[#t (match (recur e2) [#t #t] [#f #f])]
|
|
|
@@ -5005,7 +5004,7 @@ needs to be followed. Thus, we zero-out all locations on the root
|
|
|
stack in the prelude of \code{main}. In
|
|
|
Figure~\ref{fig:print-x86-output-gc}, the instruction
|
|
|
%
|
|
|
-\lstinline{movq $0, (%r15)}
|
|
|
+\lstinline{movq $0, (%r15)}
|
|
|
%
|
|
|
accomplishes this task. The garbage collector tests each root to see
|
|
|
if it is null prior to dereferencing it.
|
Fred Fu