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Preprocessor statements

set statement

The set statement, sets a preprocessor variable to a value. The values of preprocessor variables are not bound to types.
%set VERSION 0.7.1%
%set APPLICATION_NAME My Application%
Some variables are set by the Hades interpreter.
Variable
Content
OS
The operating system, a script is being ran on (can be: NT, Mac, Linux, Other)
OS_VERSION
The version of the operating system as int (417, 1803, 10136, etc...)
HADES_VERSION
The version of the Hades interpreter the script is being ran on as int
HAS_EVAL
1 if the Hades runtime has the eval function, 0 if not
HAS_INTERNALS
1 if the Hades runtime has the std:internals library, 0 if not

if-else if-fi statement

The if-elif-fi block has a couple special commands to compare values to each other.
Command
Full name
Returns true if
eq
Equals
Variables are equal
ne
Not equals
Variables are not equal
gt
Greater than
First variable is greater than second variable
lt
Lower than
First variable is lower than second variable
ge
Greater or equals
First variable is greater or equal to second variable
le
Lower or equals
First variable is lower or equal to second variable
with os from std:os
with console from std:io
var listCommand
%if eq OS Windows%
listCommand = "dir"
%else if eq OS Linux%
listCommand = "ls"
%else%
console.out("OS not recognized!")
os.exit(-1)
&fi%
%if ge OS_VERSION 1803%
os.exec("wslpath 'c:\users'")
%fi%
os.exec(listCommand)

import statement

The import statement copies the content of the specified file and pastes it into the source code (works recursively).

function.hd

func print(...a)
for(var arg in a)
console.out(arg)
end
end

classDef.hd

class printer
%import function.hd%
end

main.hd

with console from std:io
%import classDef.hd%
printer().print("Hello","world")

Result

main.hd is being converted to:
with console from std:io
class printer
func print(...a)
for(var arg in a)
console.out(arg)
end
end
end
printer().print("Hello","world")
Last modified 2yr ago
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set statement
if-else if-fi statement
import statement
function.hd
classDef.hd
main.hd
Result