Release 0.4: Matrices and equation rewrites

[c3d]

New features:

• Equation rewrite engine (Implement rules to rewrite equations #203, Equation rewrite can go into infinite loop #213, Add variable names in rewrites for "unique" variables #244)
  • Early implementation of expand and collect (Add expand and collect functions #231)
• Transient alpha mode for quick alppha entry (Transient alpha mode (was: Holding shift key for Alpha) #204, Simulator emulation of transient alpha mode #215, Label for F6 key in help is wrong #233, Transient alpha on simulator should only apply to alpha #237)
  (note that XEQ no longer automatically switches to alpha)
• Vector and array arithmetic (Arithmetic on matrix objects #26, Matrix multiplication #185, Matrix division #190)
  • Determinant of square matrices (matrices: Implement the det function #187, Determinant should return a type error if no matrix #217)
  • Inverse of a square matrix (Implement inv on matrices #180, Implement computation for the inverse of a matrix #189, Another crash under low-memory condition #201)
  • Euclidean norm for matrices and vectors (Implement norm / abs for matrices #188)
  • Component-wise multiplication and division of vectors (Accept component-wise vector multiplication and division #181)
  • Binary operations between matrix / vector and constant (Vector/matrix operations with a constant #183)
  • Matrix * vector (Add tests for matrix operations #195)
• Automatic simplification in basic operations (Arithmetic simplifications #197, AutoSimplify is not written to the state file #216, Crash in complex multiplication #221)
• Help knows how to render "yellow" and "blue" keys
• Contextual tool menu (Turn Σ+ key into TOOL "smart menu" #127) and contextual help (Implement a Help command #162, Add support for matrix and list to smart menu and help #193)
• LastMenu (xshift-A) goes back in menu history (Implement BackMenu #165)
• Displaying date and time in the header (Date and time in header #123, Adding a complex to a symbolic gives wrong result #224)
• GET function on lists and arrays (Implement the GET command #173)
• Concatenation and repetition of lists (List concatenation and repetition #178)
• Apply standard functions to arrays and lists (Mapping standard functions to arrays and lists #179, Invert on matrix with zero determinant #182)
• Add limits to size of numbers and number of rewrites (Need settings for things that go really slow #214)

Improvements:

• Better rendering of unimplemented menu functions (Better handling of unimplemented menus #218)
• Accelerate garbage collector (Avoid looping over each function pointer in the user interface #219)
• Render polar arguments with explicit angle units (Respect angle settings for trigonometrics #119, Render polar complex numbers with angle unit #161)
• Update key layout for easier matrix / vector entry (Add quicker way to enter vectors and matrices #198)
• Render complex numbers with additive precedence (Rendering complex numbers should have additive precedence #222)

Bugs fixes:

• Fix cursor position for up/down movement (editor: Keep the position of the cursor more faithfully #159)
• Show help for R/S (Eval) and division keys (Help does not correctly show up for R/S #157)
• Fix spacing for thousands (e.g 5000) (5000. displays without separators #137)
• Redraw editor after inserting variable name (Problem with insertion of variable names in editor #156)
• Draw alpha annunciator after busy cursor is cleared
• Refresh editor when going at beginning or end of text
• Parsing of Invert(X) (Syntax error parsing Invert(X) #163)
• Do not insert parenthese in editor after binary operators (Extra parenthese inserted in algebraic mode for infix + #164)
• Correct parsing of π and imaginary unit (Adding a space after π in an equation stops parsing #145, π no longer parses correctly #168, π in an equation gets "expected argument" error #169, Parsing cos(x+π) fails #207, Inserting π from command line adds parentheses #208)
• Repair repeat for R/S as a space key (Space key no longer repeats (shows help) #199)
• Parsing of complex numbers in matrices (Complex number in matric without trailing space fails (was: Entering a matrix with 3 complex numbers fails) #205)
• Parsing of complex numbers in equations (Entering a complex number in an equation fails #220, Adding a complex to a symbolic gives wrong result #224)
• Parsing of "fancy" power sign (Error parsing power in an equation #238)
• Computation of power with integer and negative exponent (Negative powers give incorrect results #239)
• Refresh menu after NumberSpacing (Menu not refreshed after NumberSpacing #240)

Other:

• Various help file improvements:
  • Help now uses more standard mardown for keys
  • As a result, README.md now points to the built-in help on GitHub (Unify documentation and help file #227)
  • Add acknowledgements to help file (Add acknowledgements to help file #129), including link to HP Museum
  • Improve documentation of differences between RPL variants (Document differences between DB48X and other RPL variants #177, Update documentation with matrix operations #192)
  • Add documentation for the Help command (Add documentation for Help command #228)
  • Fix label for F6 key in help (Static C++ equation builder #230)
  • Improve rendering of code font in help (help: Fix rendering of spaces in blocks of code #232)
• Improved test suite, now faster, more stable and detects more errors
• Fixes / adjustments to keyboard layout suggested by C47 team
• Use standard C++ iterators for programs and lists (Implement standard iterators for list (programs, arrays) #166, Program / equation iterator should terminate if either side is null #242)
• Split source files for list, program, array and equation (Separate program, array and equation into their own files #167)
• Unify precedence handling for parser and renderer
• Add "storytelling" file (Publish storytelling file #191) for video demos
• Update STATUS.md file (The STATUS.md file is quite stale #200)
• Fix generation of fonts
• Fix subtle dereferencing bug in GC pointer
• Use C++ template metaprogramming to build RPL equations from C++ (Static C++ equation builder #230)
• Use flags instread of range comparisons to check properties of objects (Replace range comparison with flags for is_algebraic and the like #234)
• Default settings when running "current test" (Unexpected reset of mantissa separators #150)
• Add rewrite_all to rewrite until convergence (Add rewrite_all that iterates on sequence of rewrite rules #241, Optimize rewrite_all to avoid code bloat #243)
• Do not integrate random files in make dist.

Verse of the day:
The kingdom of heaven is like treasure hidden in a field.
When a man found it, he hid it again, and then in his joy went and sold
all he had and bought that field (Mt 13:44)

Signed-off-by: Christophe de Dinechin christophe@dinechin.org

Full Changelog: v0.3.1...v0.4

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This discussion was created from the release Release 0.4: Matrices and equation rewrites.