Macro Constants

Supported platforms:
Available since: Gideros 2017.10

Description

Another great Gideros feature is macros. Currently Lua has no constants, you just have to define variables like pi=3.14159.

Now you can define symbolic constants like this pi @ 3.14159 and then simply use pi in the code as normal. When the Lua code is byte compiled, the constants are replaced with their literal values which saves CPU time.

Macro Constants can be used for string and numeric constants. Just use @ rather than = when defining the macro.

You can use any of these delimiters after @ but they must be used in pairs. Numbers are auto-detected.

\`~ ! # $ % ^ & * / + = |

Examples

Simple examples

num1 @ &2^0&
num2 @ &2^1&
num3 @ &num1 + num2&

pi @ 3.14159265358979324
num4 @ -100.54
num5 @ 232
num6 @ 444.10
str1 @ 'hello'
str2 @ "world"
str3 @ [[
Hello,
world!
]]

Commenting out the print command

print @ |--|

print(x, y, z, x + y, y * z) -- this line will be skipped

Advanced example

pi @ |math.atan(1.0)*4|

Methods

Events Constants

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