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Irmen de Jong 2023-08-30 13:16:39 +02:00
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@ -52,7 +52,7 @@ Language features
- It is a cross-compiler running on modern machines (Linux, MacOS, Windows, ...)
It generates a machine code program runnable on actual 8-bit 6502 hardware.
- Fast execution speed due to compilation to native assembly code. It's possible to write certain raster interrupt 'demoscene' effects purely in Prog8.
- Fast execution speed due to compilation to native assembly code. It's possible to write games purely in Prog8, and even certain raster interrupt 'demoscene' effects.
- Provides a very convenient edit/compile/run cycle by being able to directly launch
the compiled program in an emulator and provide debugging information to this emulator.
- Based on simple and familiar imperative structured programming (it looks like a mix of C and Python)
@ -62,19 +62,18 @@ Language features
and inline assembly to have full control when every register, cycle or byte matters
- Subroutines with parameters and return values
- Complex nested expressions are possible
- Variables are allocated statically
- Variables are all allocated statically
- Conditional branches to map directly on processor branch instructions
- ``when`` statement to avoid if-else chains
- ``in`` expression for concise and efficient multi-value/containment test
- Nested subroutines can access variables from outer scopes to avoids the overhead to pass everything via parameters
- Several powerful built-in functions, such as ``lsb``, ``msb``, ``min``, ``max``, ``rol``, ``ror``, ``sort`` and ``reverse``
- Variable data types include signed and unsigned bytes and words, arrays, strings.
- Floating point math also supported on select compiler targets (C64, Cx16 and virtual).
- Floating point math is supported on select compiler targets.
- Strings can contain escaped characters but also many symbols directly if they have a PETSCII equivalent, such as "♠♥♣♦π▚●○╳". Characters like ^, _, \\, {, } and | are also accepted and converted to the closest PETSCII equivalents.
- High-level code optimizations, such as const-folding (zero-allocation constants that are optimized away in expressions), expression and statement simplifications/rewriting.
- Many built-in functions, such as ``sin``, ``cos``, ``abs``, ``sqrt``, ``msb``, ``min``, ``max``, ``rol``, ``ror``, ``sort`` and ``reverse``
- Programs can be run multiple times without reloading because of automatic variable (re)initializations.
- Supports the sixteen 'virtual' 16-bit registers R0 .. R15 from the Commander X16, also on the other machines.
- If you only use standard Kernal and core prog8 library routines, it is possible to compile the *exact same program* for different machines (just change the compilation target flag)!
- Supports the sixteen 'virtual' 16-bit registers R0 .. R15 as defined on the Commander X16, also on the other machines.
- If you only use standard Kernal and core prog8 library routines, it is sometimes possible to compile the *exact same program* for different machines (just change the compilation target flag)
Code example