pccts1.txt
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- PCCTS(1) PCCTS Manual Pages PCCTS(1)
- NNAAMMEE
- PCCTS - The Purdue Compiler Construction Tool Set
- DDEESSCCRRIIPPTTIIOONN
- PCCTS is a set of public domain software tools designed to
- facilitate the implementation of compilers and other
- translation systems. These tools currently include _a_n_t_l_r,
- _d_l_g and support code. In many ways, PCCTS is similar to a
- highly integrated version of YACC [Joh78] and LEX [Les75];
- where _a_n_t_l_r (ANother Tool for Language Recognition) corre-
- sponds to YACC and _d_l_g (DFA-based Lexical analyzer Genera-
- tor) functions like LEX. However, PCCTS has many addi-
- tional features which make it easier to use for a wider
- range of translation problems.
- PCCTS grammars contain specifications for lexical and syn-
- tactic analysis, intermediate-form construction and error
- reporting. Rules may employ Extended Backus Naur Form
- (EBNF) grammar constructs and may define parameters,
- return values and local variables. Languages described in
- PCCTS are recognized via Strong LL(k) parsers constructed
- in pure, human-readable, C code. As a result, standard
- debugging tools can be used to trace and debug PCCTS
- parsers. Breakpoints can be set so that parser execution
- stops before or after grammar fragments of interest have
- been recognized.
- PCCTS grammars may contain predicates which allow parsing
- to be a function of semantics as well as syntax -- con-
- text-sensitive grammars. Backtracking can also be speci-
- fied to recognized non-LL(k) and non-LALR(k) constructs.
- In addition, PCCTS supports intermediate-form (such as
- expression-trees) construction via a flexible Abstract-
- Syntax Tree (AST) mechanism which allows trees to be built
- explicitly or automatically. The user explicitly creates
- trees via a LISP-like tree constructor or directs the
- automatic tree construction facility via simple grammar
- directives. AST nodes are user-defined and are generally
- a function of attributes. A default transformation from
- attributes ($$-variables) to AST nodes can be specified.
- Alternatively, each tree node can be defined explicitly
- via an AST node constructor.
- IINNSSTTAALLLLAATTIIOONN
- PCCTS includes a number of different programs and examples
- in the software release package--most of which like to
- live in their own directories. The install script will
- build a standard hierarchy. The PCCTS executables (_a_n_t_l_r,
- _d_l_g) may be placed anywhere the user wishes but the
- install script places them in the bin directory created
- during installation.
- To begin installation, place the pccts.tar file into the
- directory where you want to place a pccts subdirectory.
- PCCTS April 1994 1
- PCCTS(1) PCCTS Manual Pages PCCTS(1)
- Untar the file with
- tar xvf pccts.tar
- and cd into it. To install PCCTS, simply type
- make
- which will build the standard PCCTS directory hierarchy
- (under the directory where you ran the install script) and
- build executable versions of antlr and dlg.
- The examples associated with PCCTS have makefile variables
- called AANNTTLLRR, DDLLGG etc... which must be set according to
- your personal directory structure before _m_a_k_e'ing. Some
- variables point to the PCCTS executables if the PPAATTHH envi-
- ronment variable does not include your bbiinn directory.
- Also, there are variables that point to PCCTS include
- directories and must be changed if you deviate from the
- standard PCCTS installation hierarchy. _a_n_t_l_r and _d_l_g can
- be built without executable versions of themselves (_a_n_t_l_r
- and _d_l_g are written in themselves).
- GGEETTTTIINNGG SSTTAARRTTEEDD
- A C program called ggeennmmkk..cc is available in the ssuupp--
- ppoorrtt//ggeennmmkk directory of the PCCTS release.
- SSEEEE AALLSSOO
- dlg(1), antlr(1)
- PCCTS April 1994 2