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v2.29.0 (14 February 2022)
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@stan-buildbot stan-buildbot released this 14 Feb 20:03
· 979 commits to master since this release
v2.29.0
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FEATURES

  • Allow most reserved words in C++ (e.g., public) to appear in a stan program; they will be changed by the compiler to _stan_<reserved word> in the generated C++. (#962)
  • User defined functions can now be overloaded. Multiple definitions of the same function name are allowed if the arguments are different in each definition.(#1027)
  • Improved error messages for incorrect variable declarations. (#1099)
  • When an unknown identifier is encountered Stan will suggest nearby known names you might have meant (#1024)
  • Extra semicolons in data or parameters no longer produce syntax errors. (#988)
  • Improved error messages for incomplete probability library calls. (#1021)
  • Added nicer error message when a comment is unterminated at end of input. (#1025)
  • All internal compiler errors now include a link to the stanc3 issues page. (#1028)
  • Improve error messages when a user tries to declare a function argument as a constrained type. (#1030)
  • Replaced the use of the word twiddle with tilde in pedantic warning messages. (#1050)
  • Allow user-defined densities over complex arguments and deeply nested arguments. (#1046)
  • Added optimization layers --O0 (default), --O1, and --Oexperimental
  • Turn back on allowing immediately assigned to decls not be NaN initialized at O1 (#1029)
  • Allows log_prob_impl to use Struct of Arrays type for reverse mode autodiff at O1 (#955)
  • Issue a warning when a user has a model with unreachable statements, such as code following a return statement. (#1063)
  • The compiler can now compile or format standalone function definitions in a .stanfunctions file. These are compiled as if a normal Stan program was compiled with stanc3 --standalone-functions and can be used with #include statements in the functions block (#1022)
  • The canonicalizer can now have each part enabled seperately. This can be done with commands like stanc --auto-format --canonicalize=braces,deprecations <model>. Current options are deprecations, braces, and parenthesis. (#1058)
  • Ensure the canonicalizer properly prints nested if-else statements. (#1055)
  • --auto-format no longer prints code which originated from an #include directive. This can be re-enabled by using canonicalize=includes. (#1069)
  • When using --auto-format, the user can now pass --max-line-length=# to set the column number at which the formatter will try to break lines. (#1068)
  • Tweak pretty-printing of if-else blocks. (#1008)
  • Canonicalizer now adds brackets around single statements in if-else/for/while. (#1003)
  • Expose bernoulli_logit_glm_rng functions. (#1034)
  • lchoose now has the same signatures as binomial_coefficient_log. (#1010)
  • Added ordered_probit_lpmf(array[] int, real, vector) => real and ordered_probit_lpmf(array[] int, real, array[] vector) => real. (#1073)
  • Added additional normal_id_glm signatures. (#1084)
  • Added signatures for inv_erfc function. (#1090)
  • Added Differential-Algebraic Equation solver (dae, dae_tol). (#1092)
  • Added von_mises_cdf, von_mises_lcdf, von_mises_lccdf`. (#1085)
  • Added loglogistic_lpdf, loglogistic_log, loglogistic_rng and loglogistic_cdf. (#1094)

DEPRECATIONS

  • Added a warning for matrix^scalar that points users to .^ and matrix_power(). (#1026)
  • Warn about the following identifiers being reserved in a future version: array, upper, lower, offset, multiplier. (#1048)
  • The old form of declaring arrays like real a[5], which has been deprecated since 2.26, now issues a warning. (#1072)
  • Marked existing syntax deprecations (e.g., <-) as expiring in Stan 2.32.0. (#1044)
  • Deprecate nested multi-indexing on lvalues as it is inconsistent with rvalues.(#1059)

BUGFIXES

  • Fixed an issue that arose during C++ compilation of models that used a variable with the same name as a Stan library function and called that function. (#1011)
  • Fixed a bug where the lexer was allowing illegal variable names which began with an underscore. (#962)
  • Fixed an issue with parser errors 'sticking around' on subsequent runs, which primarily affected the Javascript compiler. (#1074)

DEVELOPER

  • Updated OCaml and build dependencies. (#1019)
  • Create internal developer documentation at https://mc-stan.org/stanc3/stanc/. (#1006)
  • stan2tfp now lives in a seperate repo at stan-dev/stan2tfp. (#1040)
  • Refactored Stan typechecker. (#995)
  • Replaces all references to Docker Hub for andrjohns images with stanorg. (#1017)
  • Move docker to ci-scripts repository. (#1020)
  • Refactored when logic for binaries builds and release. (#1018)
  • Added optimization level flags, debug-* and dump-math-signatures flags to stancjs. (#1082)
  • Compile Tests and Model end-to-end tests run now optionally only when test/integration/good has changed. (#1018)
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