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Version 2.0.9

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# 1 Parsetools Release Notes

This document describes the changes made to the Parsetools application.

### 1.1 Parsetools 2.0.9

#### Improvements and New Features

- Miscellaneous updates due to Unicode support.

  Own Id: OTP-10820

### 1.2 Parsetools 2.0.8

#### Improvements and New Features

- Support for Unicode has been implemented.

  Own Id: OTP-10302

- The file esyntax.yrl has been removed.

  Own Id: OTP-10660

### 1.3 Parsetools 2.0.7

#### Improvements and New Features

- Tuple funs (a two-element tuple with a module name and a function) are now officially deprecated and will be removed in R16. Use 'fun M:F/A' instead. To make you aware that your system uses tuple funs, the very first time a tuple fun is applied, a warning will be sent to the error logger.

  Own Id: OTP-9649

### 1.4 Parsetools 2.0.6

#### Fixed Bugs and Malfunctions

- Dialyzer warnings have been removed.

  Own Id: OTP-8318

- yecc: add warnings_as_errors option(Thanks to Tuncer ayaz)

  Own Id: OTP-9376

- Fix incorrect order of pseudo variables in yecc example

  The example is for converting from infix to prefix. This change uses to correct ordering of the triplet. (Thanks to Garret Smith)

  Own Id: OTP-9484

- Implement or fix -Werror option

  If -Werror is enabled and there are warnings no output file is written. Also make sure that error/warning reporting is consistent. (Thanks to Tuncer Ayaz)

  Own Id: OTP-9536

- XML files have been corrected.

  Own Id: OTP-9550 Aux Id: OTP-9541

### 1.5 Parsetools 2.0.5

#### Improvements and New Features

- The formating of Yecc's error messages has been improved. (Thanks to Joe Armstrong.)

  Own Id: OTP-8919

### 1.6 Parsetools 2.0.4

#### Fixed Bugs and Malfunctions

- Running HiPE-compiled Yecc parsers no longer results in a function_clause error.

  Own Id: OTP-8771

### 1.7 Parsetools 2.0.3

#### Fixed Bugs and Malfunctions

- Yecc failed to report reduce/reduce conflicts where one of the reductions involved the root symbol. This bug has been fixed. (Thanks to Manolis Papadakis.)

  Own Id: OTP-8483

- A bug introduced in Parsetools 1.4.4 (R12B-2) has been fixed. (Thanks to Manolis Papadakis.)

  Own Id: OTP-8486

### 1.8 Parsetools 2.0.2

#### Improvements and New Features

- Cleanups suggested by tidier and modernization of types and specs.

  Own Id: OTP-8455

### 1.9 Parsetools 2.0.1

#### Improvements and New Features

- Leex no longer uses the deprecated regexp module. (Thanks to Robert Virding.).

  Own Id: OTP-8231

#### Fixed Bugs and Malfunctions

- A minor bug in leex(3) has been fixed.

  Own Id: OTP-8197

### 1.10 Parsetools 2.0

#### Improvements and New Features

- Leex, a lexical analyzer generator for Erlang, has been added to Parsetools. This initial version should be considered experimental; it is known that there will be changes and additions. (Thanks to Robert Virding.).

  Own Id: OTP-8013

#### Fixed Bugs and Malfunctions

- The parsers generated by Yecc now report correct error lines when possible.

  Own Id: OTP-7969

### 1.11 Parsetools 1.4.7

#### Fixed Bugs and Malfunctions

- A bug in yeccpre.hrl introduced in R13A has been fixed.

  Own Id: OTP-7945

### 1.12 Parsetools 1.4.6

#### Improvements and New Features

- Updated file headers.

  Own Id: OTP-7798

### 1.13 Parsetools 1.4.5

#### Improvements and New Features

- The yecc grammar has been augmented with an optional header section. (Thanks to Richard Carlsson.)

  Own Id: OTP-7292

### 1.14 Parsetools 1.4.4

#### Improvements and New Features

- The size of the code generated by Yecc has been reduced. The code is also faster.

  Macros can now be used in actions.

  Own Id: OTP-7224

### 1.15 Parsetools 1.4.3

#### Improvements and New Features

- tuple_size/1 and byte_size/1 have been substituted for size/1.

  Own Id: OTP-7009

### 1.16 Parsetools 1.4.2

#### Improvements and New Features

- The size of the code generated by yecc has been reduced.

  A note regarding the includefile option: although yecc can cope with includefiles based on some earlier yeccpre.hrl it is recommended for efficiency reasons to update includefiles as to follow the pattern in the latest yeccpre.hrl.

  Own Id: OTP-6851

### 1.17 Parsetools 1.4.1.1

#### Improvements and New Features

- Minor Makefile changes.

  Own Id: OTP-6689

### 1.18 Parsetools 1.4.1

#### Fixed Bugs and Malfunctions

- A bug concerning precedence declarations of non-terminals "one level up" has been fixed in yecc.

  Own Id: OTP-6362

### 1.19 Parsetools 1.4

#### Improvements and Fixed Bugs

Several modifications of Yecc have been made:

- The new functions file/1,2 take the role of the old functions yecc/2,3,4. The latter functions are no longer documented but are kept for backward compatibility.

- More checks of the grammar file have been implemented. Examples are warnings for unused non-terminals and duplicated declarations.

- Invalid pseudo variables are no longer replaced by '$undefined' but cause a failure.

- Reserved words no longer need to be quoted when used as terminals or non-terminals.

- When compiling the generated parser file errors and warnings concerning user code refer to the grammar file, not the parser file.

- Yecc emits a warning if there are conflicts in the grammar. The new declaration Expect can be used to suppress this warning.

- The new operator precedence declaration Nonassoc can be used to declare operators with no associativity.

- Precedence can be given to more than one operator with one single operator precedence declaration.

- The function parse_and_scan/1 in the default includefile accepts {Function, A} as well as {{M,F}, A} as tokenizer function. Exceptions in the tokenizer are never caught.

- The functions yecc:file/1,2 can be accessed from the Erlang shell via the new functions c:y/1,2 in STDLIB.

See yecc(3) for further details.

Own Id: OTP-5366

### 1.20 Parsetools 1.3.2

#### Fixed Bugs and Malfunctions

- A bug in Yecc that was introduced in R9B has been removed. Another bug concerning precedence declaration "one level up" has been fixed.

  Own Id: OTP-5461

### 1.21 Parsetools 1.3.1

#### Fixed Bugs and Malfunctions

- A bug in the file parsetools/include/yeccpre.hrl caused yecc:parse_and_scan/1 to always report a parse failure when the lexer reported end-of-file. This problem has been fixed.

  Own Id: OTP-5369