NEWS.md

glue (development version)

• glue_sql("{var*}") once again generates NULL if var is empty.
  This reverts #292. (#318).

• The .envir argument to glue() and glue_data() really must be an environment now, as documented. Previously a list-ish object worked in some cases (by accident, not really by design). When you need to lookup values in a list-ish object, use glue_data(.x =) (#308, #317).

glue 1.7.0

• If rlang is installed, glue will generate more informative errors if an interpolated expression either can't be parsed or fails to evaluate (#229).

• + now works in more situations, and gives errors when one side isn't a character vector. It no longer automatically applies glue interpolation to a non-glue input, if there is one. You'll need to do that yourself (#286).

• glue_collapse(character()) (and hence glue_sql_collapse(character())) now return "", so that they always return a single string (#88).

• glue_sql() now collapses an empty vector to "" not "NULL" (#272).

• glue_sql() now uses DBI::dbQuoteLiteral() for all object types. This should increase fidelity of escaping for different object types (#279).

• The "Speed of glue" vignette has been converted to an article, which allows several package to be removed from Suggests (and re-located to Config/Needs/website). The code got a light refresh, including a switch from microbenchmark to bench and more modern use of ggplot2.

• Add $(C_VISIBILITY) to compiler flags to hide internal symbols from the dll (#284 @lionel-).

glue 1.6.2

• Modify a test for better forward compatibility with R.

glue 1.6.1

• glue now registers its custom knitr engines in a way that is more robust to namespace-loading edge cases that can arise during package installation (#254).

glue 1.6.0

• glue(), glue_data(), glue_col(), and glue_data_col() gain a new .literal argument, which controls how quotes and the comment character are treated when parsing the expression string (#235). This is mostly useful when using a custom transformer.

• Trailing whitespace-only lines don't interfere with indentation (#247).

glue 1.5.1

• Jennifer Bryan is now the maintainer.

• The existing custom language engines for knitr, glue and glue_sql, are documented in a new vignette (#71). Detail added after release: glue now sets up registration of these engines in .onLoad().

• glue_col() gives special treatment to styling functions from the crayon package, e.g. glue_col("{blue foo}") "just works" now, even if crayon is not attached (but is installed) (#241).

• Unterminated backticks trigger the same error as unterminated single or double quotes (#237).

• glue_sql() collapses zero-length DBI::SQL object into DBI::SQL("NULL") (#244 @shrektan).

glue 1.5.0

Breaking changes

• Long deprecated function collapse() has been removed (#213)

New functions and arguments

• New glue_sql_collapse() function to collapse inputs and return a DBI::SQL() object (#103).

• glue() gains a new .comment argument, to control the comment character (#193).

• glue() gains a new .null argument, to control the value to replace NULL values with (#217, @echasnovski).

Bugfixes and minor changes

• sql_quote_transformer() is now allows whitespace after the trailing * (#218).
• compare_proxy.glue() method defined so glue objects can be compared to strings in testthat 3e without errors (#212)
• print.glue() no longer prints an empty newline for 0 length inputs (#214)
• Unterminated comments in glue expression now throw an error (#227, @gaborcsardi)
• Unterminated quotes in glue expressions now throw an error (#226, @gaborcsardi)

glue 1.4.2

• glue_safe() gives a slightly nicer error message
• The required version of R is now 3.2 (#189)
• glue_sql() now collapses DBI::SQL() elements correctly (#192 @shrektan)
• The internal compare() method gains a ... argument, for compatibility with testthat 3.0.0

glue 1.4.1

• Internal changes for compatibility with vctrs 0.3.0 (#187).
• glue_sql() now replaces missing values correctly when collapsing values (#185).
• glue_sql() now always preserves the type of the column even in the presence of missing values (#130)

glue 1.4.0

• .envir = NULL is now supported and is equivalent to passing .envir = emptyenv() (#140)

• New glue_safe() and glue_data_safe() functions, safer versions of glue() that do not execute code, only look up values (using get()). These alternatives are useful for things like shiny applications where you do not have control of the input for your glue expressions. (#140)

• Fixed memory access issue and memory leaks found by valgrind.

glue 1.3.2

• glue now implements vctrs methods. This ensures that vectors of glue strings are compatible with tidyverse packages like tidyr (r-lib/tidyselect#170, tidyverse/tidyr#773, @lionel-).

• Fix a LTO type mismatch warning (#146)

• glue_sql() now quotes lists of values appropriate to their type, rather than coercing all values to characters (#153)

• glue_data() now implicitly coerces .x to a list.

• glue() gains the .trim argument, like glue_data().

• single_quote() double_quote() and backtick() all return NA for NA inputs (#135).

• Improve trim()'s handling of lines containing only indentation (#162, #163, @alandipert)

glue 1.3.1

Features

• glue() now has a + method to combine strings.
• glue_sql() now collapses zero-length vector into DBI::SQL("NULL") (#134 @shrektan).

Bugfixes and minor changes

• glue_sql() now supports unquoting lists of Id objects.
• glue_sql() now quotes characters with NAs appropriately (#115).
• glue_sql() now quotes Dates appropriately (#98).
• A potential protection error reported by rchk was fixed.

glue 1.3.0

Breaking changes

• The evaluate() function has been removed. Changes elsewhere in glue made the implementation trivial so it was removed for the sake of clarity. Previous uses can be replaced by eval(parse(text = text), envir).

• collapse() has been renamed to glue_collapse() to avoid namespace collisions with dplyr::collapse().

Features

• compare.glue() was added, to make it easier to use glue objects in testthat::expect_equal() statements.

• glue_col() and glue_data_col() functions added to display strings with color.

Bugfixes and minor changes

• Glue now throws an informative error message when it cannot interpolate a function into a string (#114, @haleyjeppson & @ijlyttle).

• Glue now evaluates unnamed arguments lazily with delayedAssign(), so there is no performance cost if an argument is not used. (#83, @egnha).

• Fixed a bug where names in the assigned expression of an interpolation variable would conflict with the name of the variable itself (#89, @egnha).

• Do not drop the glue class when subsetting (#66).

• Fix glue() and collapse() always return UTF-8 encoded strings (#81, @dpprdan)

glue 1.2.0

• The implementation has been tweaked to be slightly faster in most cases.

• glue() now has a .transformer argument, which allows you to use custom logic on how to evaluate the code within glue blocks. See vignette("transformers") for more details and example transformer functions.

• glue() now returns NA if any of the results are NA and .na is NULL. Otherwise NA values are replaced by the value of .na.

• trim() to use the trimming logic from glue is now exported.

• glue_sql() and glue_data_sql() functions added to make constructing SQL statements with glue safer and easier.

• glue() is now easier to use when used within helper functions such as lapply.

• Fix when last expression in glue() is NULL.

glue 1.1.1

• Another fix for PROTECT / REPROTECT found by the rchk static analyzer.

glue 1.1.0

• Fix for PROTECT errors when resizing output strings.

• glue() always returns 'UTF-8' strings, converting inputs if in other encodings if needed.

• to() and to_data() have been removed.

• glue() and glue_data() can now take alternative delimiters to { and }. This is useful if you are writing to a format that uses a lot of braces, such as LaTeX. (#23)

• collapse() now returns 0 length output if given 0 length input (#28).

glue 0.0.0.9000

• Fix glue() to admit . as an embedded expression in a string (#15, @egnha).

• Added a NEWS.md file to track changes to the package.