com php-langspec: Cleanup echo/isset/unset grammar: spec/10-expressions.md spec/19-grammar.md

Commit:    256534b60943c0610ccb0f8cde160323bcbd4f7c=0AAuthor:    Nikita Pop=
ov <[email protected]>         Tue, 15 Nov 2016 23:15:45 +0100=0AParents:   0fd=
1786650afcdd580d02a8cca535fdf4d33a27e=0ABranches:  master=0A=0ALink:       =
http://git.php.net/?p=3Dphp-langspec.git;a=3Dcommitdiff;h=3D256534b60943c06=
10ccb0f8cde160323bcbd4f7c=0A=0ALog:=0ACleanup echo/isset/unset grammar=0A=
=0Aisset and unset accept only variables.=0AFor echo, merge the single and =
multiple expression cases.=0A=0AChanged paths:=0A  M  spec/10-expressions.m=
d=0A  M  spec/19-grammar.md=0A=0A=0ADiff:=0Adiff --git a/spec/10-expression=
s.md b/spec/10-expressions.md=0Aindex f45286c..39c88cf 100644=0A--- a/spec/=
10-expressions.md=0A+++ b/spec/10-expressions.md=0A@@ -333,12 +333,11 @@ ot=
her values or expressions could be used.=0A =0A <pre>=0A   <i>echo-intrinsi=
c:</i>=0A-    echo  <i>expression</i>=0A-    echo  <i>expression-list-two-o=
r-more</i>=0A+    echo  <i>expression-list</i>=0A =0A   <i>expression-list-=
two-or-more:</i>=0A-    <i>expression</i>  ,  <i>expression</i>=0A-    <i>e=
xpression-list-two-or-more</i>  ,  <i>expression</i>=0A+    <i>expression</=
i>=0A+    <i>expression-list</i>  ,  <i>expression</i>=0A </pre>=0A =0A **D=
efined elsewhere**=0A@@ -508,25 +507,21 @@ exit;=0A =0A <pre>=0A   <i>isset=
-intrinsic:</i>=0A-    isset  (  <i>expression-list-one-or-more</i>  )=0A+ =
   isset  (  <i>variable-list</i>  )=0A =0A-  <i>expression-list-one-or-mor=
e</i>:=0A-    <i>expression</i>=0A-    <i>expression-list-one-or-more</i>  =
,  <i>expression</i>=0A+  <i>variable-list</i>:=0A+    <i>variable</i>=0A+ =
   <i>variable-list</i>  ,  <i>variable</i>=0A </pre>=0A =0A **Defined else=
where**=0A =0A-* [*expression*](#general-6)=0A-=0A-**Constraints**=0A-=0A-E=
ach *expression* must designate a variable.=0A+* [*variable*](#variables)=
=0A =0A **Semantics**=0A =0A This intrinsic returns `TRUE` if all the varia=
bles designated by=0A-*expression*s are set and their values are not `NULL`=
. Otherwise, it=0A+*variables*s are set and their values are not `NULL`. Ot=
herwise, it=0A returns `FALSE`.=0A =0A If this intrinsic is used with an ex=
pression that designate a [dynamic=0A@@ -708,21 +703,17 @@ $a > $b ? print =
"..." : print "...";=0A =0A <pre>=0A   <i>unset-intrinsic:</i>=0A-    unset=
  (  <i>expression-list-one-or-more</i>  )=0A+    unset  (  <i>variable-lis=
t</i>  )=0A </pre>=0A =0A **Defined elsewhere**=0A =0A-* [*expression-list-=
one-or-more*](#isset)=0A-=0A-**Constraints**=0A-=0A-Each *expression* must =
designate a variable.=0A+* [*variable-list*](#isset)=0A =0A **Semantics**=
=0A =0A This intrinsic [unsets](07-variables.md#general) the variables desi=
gnated by each=0A-*expression* in *expression-list-one-or-more*. No value i=
s returned. An=0A+*variable* in *variable-list*. No value is returned. An=
=0A attempt to unset a non-existent variable (such as a non-existent elemen=
t=0A in an array) is ignored.=0A =0Adiff --git a/spec/19-grammar.md b/spec/=
19-grammar.md=0Aindex beb6cf5..ce47a26 100644=0A--- a/spec/19-grammar.md=0A=
+++ b/spec/19-grammar.md=0A@@ -393,12 +393,11 @@ The grammar notation is de=
scribed in [Grammars section](09-lexical-structure.md#=0A     <i>print-intr=
insic</i>=0A =0A   <i>echo-intrinsic:</i>=0A-    echo  <i>expression</i>=0A=
-    echo  <i>expression-list-two-or-more</i>=0A+    echo  <i>expression-li=
st</i>=0A =0A   <i>expression-list-two-or-more:</i>=0A-    <i>expression</i=
>  ,  <i>expression</i>=0A-    <i>expression-list-two-or-more</i>  ,  <i>ex=
pression</i>=0A+    <i>expression</i>=0A+    <i>expression-list</i>  ,  <i>=
expression</i>=0A =0A   <i>empty-intrinsic:</i>=0A     empty ( <i>expressio=
n</i>  )=0A@@ -413,11 +412,11 @@ The grammar notation is described in [Gram=
mars section](09-lexical-structure.md#=0A     die   (   <i>expression<sub>o=
pt</sub></i>   )=0A =0A   <i>isset-intrinsic:</i>=0A-    isset  (  <i>expre=
ssion-list-one-or-more</i>  )=0A+    isset  (  <i>variable-list</i>  )=0A =
=0A-  <i>expression-list-one-or-more</i>:=0A-    <i>expression</i>=0A-    <=
i>expression-list-one-or-more</i>  ,  <i>expression</i>=0A+  <i>variable-li=
st</i>:=0A+    <i>variable</i>=0A+    <i>variable-list</i>  ,  <i>variable<=
/i>=0A =0A   <i>list-intrinsic:</i>=0A     list  (  <i>list-expression-list=
<sub>opt</sub></i>  )=0A@@ -443,7 +442,7 @@ The grammar notation is describ=
ed in [Grammars section](09-lexical-structure.md#=0A     print  <i>expressi=
on</i>=0A =0A   <i>unset-intrinsic:</i>=0A-    unset  (  <i>expression-list=
-one-or-more</i>  )=0A+    unset  (  <i>variable-list</i>  )=0A =0A   <i>an=
onymous-function-creation-expression:</i>=0A   static<sub>opt</sub> functio=
n  &<sub>opt</sub> (  <i>parameter-declaration-list<sub>opt<sub></i>  ) <i>=
return-type<sub>opt</sub></i> <i>anonymous-function-use-clause<sub>opt</sub=
></i>=0A