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28 lines
1 KiB
TeX
28 lines
1 KiB
TeX
\chapter{Concrete Syntax and\\
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Informal Semantics}
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\label{sec:concrete_syntax}
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In this chapter we describe the concrete syntax of the language as it is recognized by the parser. In the
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syntactic description we will use extended Backus-Naur form with the following conventions:
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\begin{itemize}
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\item nonterminals are presented in \nonterm{italics};
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\item concrete terminals are \term{grayed out};
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\item classes of terminals are \token{CAPITALIZED};
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\item a postfix ``$^\star$'' designates zero-or-more repetitions;
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\item square brackets ``$[\dots]$'' designate zero-or-one repetition;
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\item round brackets ``$(\dots)$'' are used for grouping;
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\item alteration is denoted by ``$\alt$'', sequencing by juxaposition;
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\item a colon ``$:$'' separates a nonterminal being defined from its definition.
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\end{itemize}
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In the description below we will take in-line code samples in blockquotes "..." which are not considered as a
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part of concrete syntax.
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\input{03.01.lexical_structure}
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\input{03.02.compilation_units}
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\input{03.03.scope_expressions}
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\input{03.04.expressions}
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