/ 
Parse-Eyapp-1.177
River stage one • 1 direct dependent • 4 total dependents

Changes for version 1.177

  • Added syntax %token = %/regexp/ meaning a contextual token. One that is returned only if expected by the syntax anañyzer.
    • %token then = %/(then)\b/ %token if = %/(if)(?!\s*=)/ %token ID = /([a-zA-Z_]\w*)/
    • See grammar t/PL_I_conflictContextualTokens.eyp
  • Provided syntax: %dummy token TUTU Meaning that the token will never be emited by the lexical generator. See t/dummytoken.eyp %syntactic token IF = /(?i:if)/ %syntactic token ELSE = /(?i:else)/ %syntactic token THEN = /(?i:then)/ %token EXPR = /(?i:(e))/ %token OTHERSTMT = /(?i:(o))/ %dummy token TUTU
  • Added to t/77lexicalanalyzergeneration.t a test that uses t/PL_I_conflictContextualTokens.eyp to check the syntax %token X = { code }
    • %token then = { $self->expects('then') and /\Gthen\b/gc and return ('then', 'then'); } %token if = { $self->expects('if') and /\Gif(?!\s*=)/gc and return ('if', 'if'); } %token ID = /([a-zA-Z_]\w*)/
    • See t/PL_I_conflictContextualTokens.eyp
  • Provided a higher level API for conflicts that can be solved using nested parsing: Cplusplusnested.eyp: %conflict decORexp decl? ID:DEC : ID:EXP
    • It means: Check for nested parser "decl" if success, reduce by 'ID:DEC', otherwise reduce by 'ID:EXP'
    • pascalnestedeyapp3_6.eyp: %conflict rORe range? ID:RANGE : ID:ENUM DebugDynamicResolution4.eyp: %conflict LD lastD? D:LAST : shift
      • It means: Check for nested parser "lastD" if success, reduce by 'D:LAST', otherwise shift
  • YYSetReduce can work without specifying the token set
  • YYSetShift can work without specifying the token set

Documentation

eyapp
A Perl front-end to the Parse::Eyapp module
Parse::Eyapp::treematchingtut
Tree Matching and Tree substitution: an introduction
Parse::Eyapp::datagenerationtut
Tutorial on Using Parse::Eyapp as a Data Generator for Testing
Parse::Eyapp::debuggingtut
Solving ambiguities and fixing lexical, syntactic and semantic errors
Parse::Eyapp::defaultactionsintro
Introduction to Default Actions and Grammar Reuse
eyapp
A Perl front-end to the Parse::Eyapp module
Parse::Eyapp::eyappintro
An introduction to Parse::Eyapp
Parse::Eyapp::eyapplanguageref
The Eyapp language reference manual
Parse::Eyapp::languageintro
Introduction to the Eyapp language
Parse::Eyapp::translationschemestut
Introduction to Translation Schemes in Eyapp
treereg
Compiler for Tree Regular Expressions

Modules

Parse::Eyapp
Bottom up parser generator
Parse::Eyapp::Base
Miscellaneous support functions for Parse::Eyapp
Parse::Eyapp::Driver
The LR parser
Parse::Eyapp::Node
The nodes of the Syntax Trees
Parse::Eyapp::Parse
The parser of Eyapp grammars
Parse::Eyapp::Scope
Support for Scope Analysis
Parse::Eyapp::TokenGen
Support for Using Parse::Eyapp as a Data Generator
Parse::Eyapp::Treeregexp
Tree transformations
Parse::Eyapp::YATW
Tree transformation objects

Provides

Parse::Eyapp::Cleaner
in lib/Parse/Eyapp/Cleaner.pm
Parse::Eyapp::Grammar
in lib/Parse/Eyapp/Grammar.pm
Parse::Eyapp::Lalr
in lib/Parse/Eyapp/Lalr.pm
Parse::Eyapp::Node::Match
in lib/Parse/Eyapp/Node.pm
Parse::Eyapp::Options
in lib/Parse/Eyapp/Options.pm
Parse::Eyapp::Output
in lib/Parse/Eyapp/Output.pm
Parse::Eyapp::Treeregparser
in lib/Parse/Eyapp/Treeregexp.pm
Parse::Eyapp::Unify
in lib/Parse/Eyapp/Unify.pm
Parse::Eyapp::_TreeregexpSupport
in lib/Parse/Eyapp/_TreeregexpSupport.pm

Examples

Other files