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84 lines
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<H2>Issue COMPILE-FILE-PACKAGE Writeup</H2>
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<PRE><B>Issue:</B> <A HREF="iss061.htm">COMPILE-FILE-PACKAGE</A><P>
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<B>References:</B> CLtL p. 182, 183<P>
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<B>Category:</B> CHANGE, CLARIFICATION<P>
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<B>Edit History:</B> 1 Sep 1988, Sandra Loosemore (initial version)<P>
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21 Sep 1988, Sandra Loosemore (minor tweak to current practice)<P>
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<P>
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<P>
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<B>Problem Description:<P>
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</B><P>
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The variable <A REL=DEFINITION HREF="../Body/v_pkg.htm#STpackageST"><B>*PACKAGE*</B></A> is rebound by the function <A REL=DEFINITION HREF="../Body/f_load.htm#load"><B>LOAD</B></A>, so that its<P>
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old value will be restored in spite of any calls to <A REL=DEFINITION HREF="../Body/m_in_pkg.htm#in-package"><B>IN-PACKAGE</B></A><P>
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appearing in the file being loaded. Since <A REL=DEFINITION HREF="../Body/f_cmp_fi.htm#compile-file"><B>COMPILE-FILE</B></A> must evaluate<P>
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any top-level calls to <A REL=DEFINITION HREF="../Body/m_in_pkg.htm#in-package"><B>IN-PACKAGE</B></A> that it sees, it may also alter the<P>
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value of <A REL=DEFINITION HREF="../Body/v_pkg.htm#STpackageST"><B>*PACKAGE*</B></A>. It is inconsistent to have <A REL=DEFINITION HREF="../Body/f_cmp_fi.htm#compile-file"><B>COMPILE-FILE</B></A> and <A REL=DEFINITION HREF="../Body/f_load.htm#load"><B>LOAD</B></A><P>
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behave differently regarding the rebinding of this variable.<P>
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<P>
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<P>
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<B>Proposal COMPILE-FILE-PACKAGE:REBIND:<P>
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</B><P>
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Require <A REL=DEFINITION HREF="../Body/f_cmp_fi.htm#compile-file"><B>COMPILE-FILE</B></A> to rebind <A REL=DEFINITION HREF="../Body/v_pkg.htm#STpackageST"><B>*PACKAGE*</B></A> before processing the file.<P>
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<P>
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<P>
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<B>Rationale:<P>
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</B><P>
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This makes <A REL=DEFINITION HREF="../Body/f_cmp_fi.htm#compile-file"><B>COMPILE-FILE</B></A> and <A REL=DEFINITION HREF="../Body/f_load.htm#load"><B>LOAD</B></A> more consistent. It is a more<P>
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compatible solution than either requiring <A REL=DEFINITION HREF="../Body/f_load.htm#load"><B>LOAD</B></A> not to rebind<P>
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<A REL=DEFINITION HREF="../Body/v_pkg.htm#STpackageST"><B>*PACKAGE*</B></A>, or removing the specialness of <A REL=DEFINITION HREF="../Body/m_in_pkg.htm#in-package"><B>IN-PACKAGE</B></A> and the other<P>
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package functions.<P>
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<P>
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<P>
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<B>Current Practice:<P>
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</B><P>
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Lucid Common Lisp, the TI Explorer, and VaxLisp already implement this <P>
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proposal.<P>
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<P>
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<P>
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<B>Cost to implementors:<P>
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</B><P>
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Trivial.<P>
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<P>
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<P>
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<B>Cost to users:<P>
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</B><P>
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I find it hard to believe that users would consider <A REL=DEFINITION HREF="../Body/f_cmp_fi.htm#compile-file"><B>COMPILE-FILE</B></A> altering<P>
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the value of <A REL=DEFINITION HREF="../Body/v_pkg.htm#STpackageST"><B>*PACKAGE*</B></A> as a useful side effect.<P>
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<P>
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<P>
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<B>Benefits:<P>
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</B><P>
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The language is made more uniform.<P>
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<P>
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<P>
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<B>Discussion:<P>
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</B></PRE>
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