Add stub grammar definitions and sections (#138)

These are just empty placeholder sections with some grammar definitions
to fill in the ID expression grammars. Properly documenting this will
require going back and defining scopes and other lexical constructs.

Since all of this is more or less inherited from C/C++ I'm going to
leave them as stubs for now and focus on the HLSL-specific sections.

specs/language/expressions.tex

@@ -96,3 +96,40 @@
 and value category as \textit{E} without the enclosing parenthesis. A
 parenthesized expression may be used in the same contexts with the same meaning
 as the same non-parenthesized expression.
+
+\Sub{Names}{Expr.Primary.ID}
+
+\begin{note}
+  The grammar and behaviors of this section are almost identical to C/C++ with
+  some subtractions (notably lambdas and destructors).
+\end{note}
+
+\begin{grammar}
+  \define{id-expression}\br
+  unqualified-id\br
+  qualified-id
+\end{grammar}
+
+\SubSub{Unqualified Identifiers}{Expr.Primary.ID.Unqual}
+
+\begin{grammar}
+  \define{unqualified-id}\br
+  identifier\br
+  operator-function-id\br
+  conversion-function-id\br
+  template-id\br
+\end{grammar}
+
+\SubSub{Qualified Identifiers}{Expr.Primary.ID.Qual}
+
+\begin{grammar}
+  \define{qualified-id}\br
+  nested-name-specifier \opt{\keyword{template}} unqualified-id\br
+  \define{nested-name-specifier}\br
+  \terminal{::}\br
+  type-name \terminal{::}\br
+  namespace-name \terminal{::}\br
+  nested-name-specifier identifier \terminal{::}\br
+  nested-name-specifier \opt{\keyword{template}} simple-template-id \terminal{::}
+\end{grammar}
+

specs/language/hlsl.tex

@@ -18,9 +18,11 @@
 
 \renewcommand{\familydefault}{\sfdefault}
 
+\setcounter{secnumdepth}{3} % number subsections
 \newcommand{\Ch}[2]{\chapter[#1]{#1\hfill[#2]}\label{#2}}
 \newcommand{\Sec}[2]{\section[#1]{#1\hfill[#2]}\label{#2}}
 \newcommand{\Sub}[2]{\subsection[#1]{#1\hfill[#2]}\label{#2}}
+\newcommand{\SubSub}[2]{\subsubsection[#1]{#1\hfill[#2]}\label{#2}}
 
 \input{glossary}
 
@@ -50,8 +52,15 @@
 
 \setlength\parindent{0cm}
 
-\newcounter{parcount}
-\counterwithin{parcount}{subsection}
+\newcommand{\newparcounter}[1]{
+\newcounter{#1}
+\counterwithin{#1}{chapter}
+\counterwithin{#1}{section}
+\counterwithin{#1}{subsection}
+\counterwithin{#1}{subsubsection}
+}
+
+\newparcounter{parcount}
 \newcommand\p{%
     \stepcounter{parcount}%
     \parnum \hspace{1em}%

specs/language/macros.tex

@@ -19,6 +19,7 @@
   \newcommand{\define}[1]{{\textit{##1}\textnormal{:}}}
   \newcommand{\terminal}[1]{{\texttt{##1}}}
   \newcommand{\br}{\hfill\\*}
+  \newcommand{\opt}[1]{{##1\textsubscript{\textit{opt}}}}
 
   \renewcommand{\texttt}[1]{{\small\ttfamily\upshape ##1}}