SIMION SL Compiler

The SL Compiler allows you to write SIMION user programs in a high-level "SL" language (rather than low-level PRG code). SL programs are compiled directly into PRG code, which is then executed as usual by SIMION and can be mixed with existing PRG programs. For more complicated applications, SL code can also invoke remote C++ code via the SL Remote interface.

Below is a sample of SL code. This may be compiled with the online compiler demo.

adjustable electrode_voltage = 500 # voltage cycle magnitude
adjustable switch_time = 2.0       # change time (microseconds)

# electrode voltage control
sub fast_adjust
    # start undulating at time switch_time
    if ion_time_of_flight < switch_time
        adj_elect01 = electrode_voltage ...
            * cos(1 + ion_time_of_flight/10)
    else
        adj_elect01 = 0
    endif
endsub

Language/compiler features:

• Write SIMION custom programs in a high-level language (with a fairly typical, procedural syntax)
• Infix expressions: x+cos(2+x*y)/log(n+1)
• Array syntax: x[y+2] = y[3*n/2]
• Custom subroutines, recursion, multiple return values
• Loops: for, while
• Conditionals and Boolean logic: if, functional-if, (x > 2*y) or not (x = 0) and y > 2+cos(x)
• List assignment: (x, y, z) = rect3d_to_polar3d(a, b, c)
• Utility functions: min, max, ceil, floor
• Import/include mechanism
• PRG code formatted for human-readability
• SL Remote: Call subroutines in a remotely running C++ program from SL. (support for other languages can be added upon request)
• Regression tested
• Tutorial and Language Reference documents included
• Full compiler source code included (Perl)