Request for Comments: Improved parser error message

• Version: 1.0
• Date: 2011-05-16
• Author: Felipe Pena felipe@php.net
• Status: Under Discussion

The purpose of this RFC is to propose a naming of our tokens to have an crypto-less parser error messages. This is simply achieved by using an old Bison feature.

$ sapi/cli/php -r 'function ""'
Patched:
Parse error: syntax error, unexpected quoted-string, expecting identifier or '(' in Command line code on line 1

Current:
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting T_STRING or '(' in Command line code on line 1

$ sapi/cli/php -r 'echo ::a;'
Patched:
Parse error: syntax error, unexpected :: in Command line code on line 1

Current:
Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM in Command line code on line 1

$ sapi/cli/php -r 'echo <<='
Patched:
Parse error: syntax error, unexpected <<= in Command line code on line 1

Current:
Parse error: syntax error, unexpected T_SL_EQUAL in Command line code on line 1

• http://felipe.ath.cx/diff/improved-error-message.diff