Liberty Syntax Highlighting

Syntax highlighting for Liberty (.lib) timing library files used in EDA/VLSI design.

Features

This extension provides comprehensive syntax highlighting for the Liberty format:

Comments: Block (/* */) and line (//) comments
Strings: Double-quoted strings with escape character support
Numbers: Integer and floating-point numbers (including scientific notation)
Groups: All major Liberty groups with dedicated scoping:
- library, cell, pin, pg_pin, timing
- lu_table_template, power_lut_template
- operating_conditions, wire_load, wire_load_selection
- ff, latch, statetable
- cell_rise, cell_fall, rise_transition, fall_transition
- intrinsic_power, leakage_power, internal_power
- And many more...
Complex Attributes: Table data (values, index_1–index_7)
Simple Attributes: 160+ Liberty attributes (technology, delay_model, direction, capacitance, timing_type, etc.)
Define Blocks: define (name) { ... } macro definitions
Punctuation: Braces, parentheses, semicolons, colons, commas

Package the extension:
```
npx @vscode/vsce package
```
In VS Code: Extensions → ... → Install from VSIX... → select liberty-syntax-1.0.1.vsix

Liberty files describe timing, power, and physical characteristics of standard cells in VLSI design. The format is hierarchical:

attribute_name : value ;

Values can be numbers, strings, or identifiers:

technology     : cmos ;
area           : 10.5 ;
function       : "A & B" ;

Table data uses parenthesized lists:

values ("0.1, 0.5, 1.0, 2.0, 5.0") ;
index_1 ("0.01, 0.05, 0.1, 0.5, 1.0") ;

Groups have optional parameters and a body in braces:

library (my_lib) {
    cell (AND2) {
        pin (A) {
            direction : input ;
            capacitance : 0.002 ;
        }
    }
}

Macro definitions for repeated structures:

define (ff_timing) {
    timing () {
        related_pin : "CK" ;
        timing_type : rising_edge ;
    }
}

A comprehensive sample .lib file is available at test/sample.lib that exercises all syntax highlighting features.

MIT