Parser Fixes

[iamrecursion]

Summary

The current parser is in a pretty buggy state, and needs a lot of things fixed in it. This is going to take place as a two-part effort. Part 1 will involve fixing urgent issues in the current parser implementation, while part 2 will involve migrating to the new parser implementation.

Value

We will be able to deal with the language syntax in a far better way.

Specification

• Fix "Pattern Segment was Unmatched" issue (Parser Error: Template Pattern Segment was Unmatched #470).
• Fix an issue with the variable operator precedence (Variable Operator Precedence Parsing Issue #469).
• Translate interpolated strings to concatenation as macro (Translate Interpolated Strings to Concatenation as a Macro #513).

Acceptance Criteria & Test Cases

• The entire above specification has been completed.
• None of the tasks have resulted in functional regressions.