Release 0.7.8 "Mustard" - Constants in equations

[c3d]

This release keeps marching towards full support for an equation library.
The primary focus was support for constants in equations, including constants with units like the speed of light, as well as fixing various user-reported issues.

Features

• cycle: Apply to value of tagged object
• equations: Add units to built-in equations
• equations: Adjust menu label to remove units
• equations: Strip units but not constants when rendering
• expressions: Treat 2X as an implicit product
• solver: Strip units from constants
• units: Unit prefix should preserve the tag

Bug fixes

• clearlcd: Fix erasure of screen when not in graphics mode
• constants: Count number of menu entries correctly for builtin menus
• decimal: Accept leading . or , for decimal values
• expressions: Parse negation after parentheses
• sum: Do not accept a non-name in a sum or product
• type: Return a type value for decimals
• ui: Fix insertion/editing of infix with alphabetic names
• units: Do not read units from variable if they exist
• xroot: Reverse xroot arguments in algebraic parsing

Improvements

• editor: Shift-up returns to beginning of line if on first row
• errors: Add error_save class, use it in constant::value
• expressions: Use the SaveAutoSimplify class in simplify_products
• units: Split Eng to Elec and Visc

Full Changelog: v0.7.7...v0.7.8

---

This discussion was created from the release Release 0.7.8 "Mustard" - Constants in equations.

[guirossibrum]

Christophe. What are the differences between DB48X and DB50X? Per the help menu they are the same. I have one calculator with DB48X and another DM42 on order 👍🏻