JSSON v0.0.5.2 — Variable Arithmetic Fix

v0.0.5.2 — Variable Arithmetic Fix

Bug Fixes

Variable Arithmetic Operations 🔧

Fixed a critical bug where arithmetic operations using variables would fail with "unsupported binary operation" errors. Previously, assignment statements (price = 100) were not stored in the symbol table, causing subsequent references to be treated as undefined identifiers instead of their numeric values.

Before (broken):

price = 100
tax = 15
total = price + tax  // ❌ Error: unsupported binary operation

After (fixed):

price = 100
tax = 15
total = price + tax  // ✅ Works! total = 115

discount = 20
final = total - discount  // ✅ final = 95

Technical Details:

• Modified Transpiler.Transpile() to store assignment values in both the symbol table and output
• File: internal/transpiler/transpiler.go (line 75)
• Now assignments can be referenced in subsequent expressions

Examples:

// Chained calculations
quantity = 5
itemPrice = 10
subtotal = quantity * itemPrice  // 50

// Mixed operations
base = 100
withTax = base + 15      // 115
withDiscount = withTax - 10  // 105
doubled = withDiscount * 2   // 210

New Features

Compilation Timer ⏱️

Added compilation time measurement to both CLI and playground for performance visibility.

CLI:

$ jsson -i config.jsson > output.json
✓ Compiled in 552.6µs

• Auto-formats time units: µs, ms, or s
• Printed to stderr (doesn't interfere with output redirection)
• Helps identify performance bottlenecks

Streaming Support for Large Datasets 🚀

Added streaming infrastructure for efficient handling of large data volumes.

CLI Flags:

# Enable streaming mode
jsson -i large-data.jsson --stream

# Auto-enable for ranges > N items (default: 10,000)
jsson -i data.jsson --stream-threshold 5000

Features:

• Memory reduction: ~500MB → < 50MB for 100k items
• Lazy evaluation with RangeIterator
• Automatic threshold detection

Other Improvements

• Added 40+ edge case tests to improve robustness
• Created comprehensive test suite for variable arithmetic