Performance improvement

At this stage, ToP is always a TOSCA Yaml 1.2 syntax validator.

• V0.2 used an ANTLR V4 grammar for Yaml parsing step, which resulted in slow performance.
• V.03 uses the yaml-js library whose compose API builds a structure a very similar to the AST we used in V.02.
  This change drastically improves performance.

TOSCA dialects syntax validator

This version splits the initial v0.1 used grammar into 2 levels :

• YAML derivative grammar using ANTLR v4
• TOSCA dialect validation using json schemas
  It allows to manage with the same parser different TOSCA dialects (TOSCA 1.0 and 1.2 provided).
  This split also provides more efficiency and solve the problem of the number of TOSCA predefined keywords.

Syntax validator for TOSCA Yaml 1.2

Pre-production release version 0.1

At this stage, ToPar is a TOSCA Yaml 1.2 syntax validator.

Features

TOSCA 1.2 standard is fully implemented with the exception of 'dsl_definitions'.

Tests

The tests (a little over 400) cover the entire grammar as defined in the standard and all the examples provided in the latter.