godzil/ack
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Initial revision

Browse Source
This commit is contained in:
ceriel
1987-02-26 10:26:19 +00:00
parent 00b8ca7b58
commit 690cd32023
12 changed files with 785 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
doc/occam/p5 Normal file
View File

@@ -0,0 +1,18 @@
.NH
Conclusions
.PP
Writing the compiler was very straightforward using the LLgen parser generator.
Its extended grammar and its way of conflict resolving were of great use to us,
especially
the indentation handling could be implemented quite easily. The automatic
error recovery given by LLgen took a great weight of our shoulders.
.PP
A set of parallelism simulation routines makes implementing \fBPAR\fP constructs
very simple. And we consider it a necessity to have such a layer to shield the
compiler writer from these details.
.PP
The translation to EM code was fairly direct, no great tricks were needed to
make things work. Only the different sizes of words and pointers that are given
as parameters to the compiler must be carefully watched. Variables or pointers
must sometimes be handled with double word instructions for different word or
pointer sizes.