\begin{itemize}
\item Nothing taboo under the hood: the underlying mechanisms of the
language must remain simple enough to be intelligible to their
- intended users. Black magic should be banned from the desing. This
+ intended users. Black magic should be banned from the design. This
rules out hygienic macros as a primitive: these either rely on very
advanced and hard to predict mechanisms, or severely limit the
manipulation tools available to the macro authors.
\item Simple by default: advanced users should know what happens under
the hood, but more casual users should be able to simply turn the
- ignition and drive. It should be possible to use H, for regular
+ ignition and drive. It should be possible to use H for regular
macros, without much understanding of its advanced principles and
implementation.
\item Everything's a regular program: again, most macro systems
\paragraph{Inside captures}
There are two kind of captures, inside a macro and outside a
-macro. People often think about inside captures, in parts because the
+macro. People often think about inside captures, in part because the
C preprocessor is subject to it. It happens when a macro inserts user
code in a quote, and the quote declares a local variable that shadows
a user one:
}, +{result} } }
\end{Verbatim}
-This is fixed by renaming automatically all local variables in the
+This is fixed by automatically renaming all local variables in the
macro with fresh names. H provides an AST walker which does
that. However, it needs to rename only macro code, not user-provided
code; therefore the macro writer has to somehow mark the user
(-{`Id '.2.X.table'}.tostring(table)))
\end{Verbatim}
-To make this work, we need to introduce, somewhere where no variable
+To make this work, we need to introduce, someplace where no variable
is captured, the following local statement:
\begin{Verbatim}
local -{`Id '.1.X.printf'}, -{`Id '.2.X.table'} = printf, table
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