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r2c

0.3.0

New Features

  • Subset ([) and subassign (x[s] <- y) with strictly positive indices.
  • Relational (>, >=, <, <=) and equality operators (==, !=).
  • Logical functions:
    • Operators (&, |, &&, ||).
    • all and any.
    • ifelse, with the caveat the return value type is based on the combination of yes and no irrespective of whether one or both of them are used.
  • Unary operators (-, +, and !).
  • Vector generation:
    • rep
    • seq_along
    • c,
    • numeric (and r2c only numeric_along).
  • Control structures, with significant constraints (see ?r2c-control-structures):
    • if/else/else if.
    • for
  • Constant arbitrary R expressions may be embedded, with constraints (see ?r2c-expression-types).
  • Iteration level interrupts (e.g. between groups, windows).
  • Improved top-level documentation.

Internal Changes

  • Direct calls to "r2c_fun" no longer use group_exec_int internally and thus save the cost of allocating a dummy group vector.
  • Dynamic libraries are unloaded when the "r2c_fun" object they are linked to is garbage collected (see ?unload_r2c_dynlibs for limitations).
  • Detect whether to use pow or powl C exponentiation functions to match Windows behavior.

0.2.0

New Features

  • Implement assignment (<-, =) and multi-line statements with braces ({).
  • Optimize expressions by reusing repeated sub-calls instead of re-evaluating them (see reuse_calls, which can potentially be used outside of r2c).
  • Add limited :: support so it is possible to use the compilation functions on r2c provided R functions without r2c attached.
  • Add r2cf to directly compile R functions composed of r2c compatible calls.

Breaking Changes

Recall the API is unstable and may still change further over the next few releases.

  • r2c has been renamed r2cl.
  • envir parameter to the runner functions has been dropped. Now "r2c_fun" functions always evaluate in the lexical environment they were created in. In the future there might be facilities to change that environment.

0.1.0

New Features

  • roll*_exec to apply r2c functions on sliding windows of data.
  • group_exec accepts factor group columns.

Breaking Changes

Recall the API is unstable and may still change further over the next few releases.

  • group_exec parameters re-ordered to align with roll*_exec.

0.0.1

Initial release:

  • r2c for basic aggregation and arithmetic operations.
  • group_exec to repeatedly apply them on groups.