Julie's email 2021-11-10

xml/chapter4/section1/subsection2.xml

@@ -567,7 +567,7 @@ null
 and omit their declarations if they just access the obvious list elements.
  </TEXT>
  <TEXT>
-We provide a constructor for literals, which will come in handy.
+We provide a constructor for literals, which will come in handy:
 <SNIPPET PAGE="369" POSTPADDING="no">
  <INDEX><DECLARATION>make_literal</DECLARATION></INDEX>
  <NAME>make_literal</NAME>

xml/chapter4/section4/subsection1.xml

@@ -1740,6 +1740,7 @@ process_query('outranked_by(list($who, "Ben"), $the_boss)', "");
  </SNIPPET>
  says that a staff person is outranked by a boss in the organization if
  the boss is the person<APOS/>s supervisor or (recursively) if the
+ <SHRINK_PARAGRAPH lines="1"/>
  person<APOS/>s supervisor is outranked by the boss.
  </TEXT>
 

xml/chapter5/section4/subsection1.xml

@@ -806,7 +806,6 @@ compound-apply
  </JAVASCRIPT>
  </SNIPPET>
 
- <LONG_PAGE lines="1"/>
  <TEXT>
  Unlike <JAVASCRIPTINLINE>eval_sequence</JAVASCRIPTINLINE> in the metacircular
  evaluator, <JAVASCRIPTINLINE>ev_sequence</JAVASCRIPTINLINE> does not need to check whether a return statement was

xml/chapter5/section5/subsection1.xml

@@ -682,31 +682,6 @@ make_instruction_sequence(list("env", "continue"), list("val"),
  </SNIPPET>
  </TEXT>
 
- <TEXT>
- We sometimes need to construct an instruction sequence with no
- <SPLITINLINE>
- <SCHEME>
-statements:
- </SCHEME>
- <JAVASCRIPT>
-instructions:
- </JAVASCRIPT>
- </SPLITINLINE>
- <SNIPPET EVAL="no">
- <INDEX><DECLARATION>empty_instruction_sequence</DECLARATION></INDEX>
- <NAME>empty_instruction_sequence</NAME>
- <SCHEME>
- (define (empty-instruction-sequence)
- (make-instruction-sequence '() '() '()))
- </SCHEME>
- <JAVASCRIPT>
-function empty_instruction_sequence() {
- return make_instruction_sequence(null, null, null);
-}
- </JAVASCRIPT>
- </SNIPPET>
- </TEXT>
-
  <TEXT>
  The
  <SPLITINLINE>
@@ -800,7 +775,6 @@ f(g("x"), "y")
  </SNIPPET>
  </EXERCISE>
 
- <SHORT_PAGE lines="2"/>
  <EXERCISE>
  Using the
  <INDEX>compiler for JavaScript<SUBINDEX>explicit-control evaluator vs.</SUBINDEX></INDEX>
@@ -838,6 +812,7 @@ f(g("x"), "y")
  </JAVASCRIPT>
  </SPLITINLINE>
  as a special case.
+ <DO_BREAK_PAGE/>
  <OL>
  <LI>
 Extend the explicit-control evaluator to recognize as a separate class

xml/chapter5/section5/subsection2.xml

@@ -115,7 +115,7 @@ function compile_linkage(linkage) {
  ? make_instruction_sequence(list("continue"), null,
  list(go_to(reg("continue"))))
  : linkage === "next"
- ? empty_instruction_sequence()
+ ? make_instruction_sequence(null, null, null)
  : make_instruction_sequence(null, null, 
  list(go_to(label(linkage))));
 }
@@ -156,7 +156,7 @@ function end_with_linkage(linkage, instruction_sequence) {
  </SNIPPET>
  </TEXT>
 
- <SHORT_PAGE lines="3"/>
+ <DO_BREAK_PAGE/>
  <SUBHEADING>
  <NAME>Compiling simple
  <SPLITINLINE>
@@ -742,7 +742,11 @@ function compile_conditional(component, target, linkage) {
  and <SCHEMEINLINE>continue</SCHEMEINLINE> (possibly needed
  for the linkage at the end of the sequence)
  are preserved.<FOOTNOTE>
-
+The <JAVASCRIPTINLINE>continue</JAVASCRIPTINLINE> register would
+be needed for a <JAVASCRIPTINLINE>"return"</JAVASCRIPTINLINE>
+linkage, which can result from a compilation by
+<JAVASCRIPTINLINE>compile_and_go</JAVASCRIPTINLINE>
+(section<SPACE/><REF NAME="sec:interfacing-compiled-code"/>).
  </FOOTNOTE>
  </JAVASCRIPT>
  </SPLITINLINE>

xml/chapter5/section5/subsection7.xml

@@ -935,7 +935,6 @@ const eceval =
  <REQUIRES>start</REQUIRES>
  <REQUIRES>compile</REQUIRES>
  <REQUIRES>make_instruction_sequence</REQUIRES>
- <REQUIRES>empty_instruction_sequence</REQUIRES>
  <REQUIRES>compile_linkage</REQUIRES>
  <REQUIRES>end_with_linkage</REQUIRES>
  <REQUIRES>compile_literal</REQUIRES>