Re: p-code compilers (Wolfgang Lohmann)
27 Jan 1999 12:14:13 -0500

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From: (Wolfgang Lohmann)
Newsgroups: comp.compilers
Date: 27 Jan 1999 12:14:13 -0500
Organization: University of Rostock
References: 99-01-078 99-01-087
Keywords: interpreter

just two remarks:

Derek Ross ( wrote:
: Bogomil Alexondrov wrote in message 99-01-078...


: > .... what is the exact definition for
: > compiler?

: Java generates p-code, using its compiler. The p-code is then
: interpreted by the Java Virtual Machine. Both Java and the JVM are
: translators of different types.


Java is a language and therefore neither translator nor compiler.
Confusing these concepts often leads to sentences like "Java is
slowier than C++", or "This compiler is faster than that" ( when speed
of generated code is meant).

: By the way, p-code is different from pseudocode. Pseudocode is a
: natural language based method of describing an algorithmn. P-code is
: virtual machine code. The original p-code was developed for Pascal.
: I suppose that's why it's called p-code.

and, as a fact, P-code differs from J-Code, and P stands for Pascal,
while J for Java (who would expect that ;-) ). There are much more so
called intermediate languages, as these are commen to enable an easier
translation/compilation process especially at the beginning of the
life of a language.


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