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base repository: crystal-lang/crystal
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head repository: crystal-lang/crystal
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  • 2 commits
  • 1 file changed
  • 1 contributor

Commits on Aug 19, 2017

  1. Document flag? macro method

    @asterite
    asterite committed Aug 19, 2017
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    444e80c View commit details

  2. flag? macro method: link to compile-time flags docs

    @asterite
    asterite committed Aug 19, 2017
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    34cf351 View commit details
Showing with 8 additions and 0 deletions.
  1. +8 −0 src/compiler/crystal/macros.cr
8 changes: 8 additions & 0 deletions src/compiler/crystal/macros.cr
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Original file line number Diff line number Diff line change
@@ -27,6 +27,14 @@ module Crystal::Macros
def env(name) : StringLiteral | NilLiteral
end

# Returns whether a [compile-time flag](https://crystal-lang.org/docs/syntax_and_semantics/compile_time_flags.html) is set.
#
# ```
# {{ flag?(:x86_64) }} # true or false
# ```
def flag?(name) : BoolLiteral
end

# Prints an AST node at compile-time. Useful for debugging macros.
def puts(expression) : Nop
end