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Eli: Translator Construction Made Easy

General Information

o Eli: Translator Construction Made Easy
o Global Index
o Frequently Asked Questions
o Typical Eli Usage Errors

Tutorials

o Quick Reference Card
o Guide For new Eli Users
o Release Notes of Eli
o Tutorial on Name Analysis
o Tutorial on Scope Graphs
o Tutorial on Type Analysis
o Typical Eli Usage Errors

Reference Manuals

o User Interface
o Eli products and parameters
o LIDO Reference Manual
o Typical Eli Usage Errors

Libraries

o Eli library routines
o Specification Module Library

Translation Tasks

o Lexical analysis specification
o Syntactic Analysis Manual
o Computation in Trees

Tools

o LIGA Control Language
o Debugging Information for LIDO
o Graphical ORder TOol

o FunnelWeb User's Manual

o Pattern-based Text Generator
o Property Definition Language
o Operator Identification Language
o Tree Grammar Specification Language
o Command Line Processing
o COLA Options Reference Manual

o Generating Unparsing Code

o Monitoring a Processor's Execution

Administration

o System Administration Guide
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Cola Option Tool

Introduction

In ELI you can use different parser generators, namely COLA or PGS. By default ELI uses the PGS parser generator. In order to specify the COLA parser, add an option after the `.specs'-filename in the ELI derivation command. For example, you can write 

   myfile.specs +parser='cola' :source > src

if you want to use the COLA-Parser-Generator. If you use COLA as your parser generator, you can modify the behavior of COLA by specifing options in a `.cola'-file. Seperate the options with white space. (e.g. put every option in one line by itself.) You can add comments using C-style-comments or AWK-Comments. Add this filename to your `.specs'-file. That's all.

In the next section all the options that can be used in that file will be described.

Options

INFO ON/OFF

A derivation of `:parsable' will produce the complete state tables. Default is, that COLA generates only information whether the grammar is LALR(1) or not. If it is not, COLA will print the conflict states. Switching this option on will get you information on all the states with all productions and symbols of the grammar.

FREE POS ON/OFF

Switching on this option gives you additional information about free positions in the grammar. This information can be used for parse time evaluation. Free positions in a grammer can be filled with connections without destroying the LALR(1)-property.

For the current installation of Cola this option has no effect.

ERROR AUTOMATIC ON/OFF

With this option you can specify if the parser should continue or stop after a syntax error. This option is turned on by default. (meaning that the parser should continue after a syntax error)

OPT INFO ON/OFF

If you enable this option, a derivation of `:colaOptInfo' in ELI will contain the optimisation results from the COLA backend. By default, this option is switched off. TTAB <mode>

This option has effect on the optimisation of the parser tables. Please refer to Optimization of Parser Tables for Portable Compilers, P.Denker, K.Duerre and J.Heuft, TOPLAS 6(4), Page 564-572, 1984. `mode' can be one of the following:

`GCSA'
`GCSB'
Graph Coloring Scheme
`LESA'
`LESB'
Line Elemination Scheme
`RCSA'
`RCSB'
Row Column Scheme
`SDS'
Significant Distance Scheme
`RDS'
Row Displacement Scheme

NTAB <mode>

Analoguous to the terminal table this option effects the nonterminal table. `mode' can have the same values as above.

Index

+

`+parser'
Introduction

.

`.cola'
Introduction

C

`colaOptInfo'
Options
connections
Options

E

`ERROR AUTOMATIC'
Options

I

`INFO'
Options

O

`OPT INFO'
Options

P

`parsable'
Options

S

Syntax Errors
Options