Joseph Ferano
25f56c24a8
vendor/raylib/modes.flan: five macros over the five pairs the package binds -- with-drawing, with-mode-2d, with-mode-3d, with-texture-mode, with-scissor-mode. A second file with no declare-c in it, split out on vector.flan's reasoning: raylib.flan is the package's statement about C and nothing here names C, so nothing here can be made wrong by raylib changing. Each expands to (do (begin-... args) body... (end-...)) -- the calls the author used to type, in the order they typed them. No let, no gensym: nothing binds a name, so there is nothing for a caller's name to collide with. What it removes is the End* that is missing, wrong, or no longer beside its Begin*. What it cannot remove is a body leaving through the unwind path: a return or an invoke-restart skips the rest of the do and the End* with it. defer is the obvious fix and is refused inside a loop body, which is where a pair always lives -- checked, not assumed. So sand.flan's discipline stays: keep the restart boundary outside the pair. 35 call sites converted across examples/ and sand.flan. The one left is core-scissor-test.flan, whose Begin and End sit in two separate `when`s with the drawing between them -- a conditional pair is a shape a bracketing macro cannot express. test/programs/rl-with.flan covers with-scissor-mode, which no example can, with a frame function unreachable from main so it needs no libraylib; rl-with-reject.flan is the arity half.
32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
;;;; raylib [core] example - basic window
|
|
;;;;
|
|
;;;; examples/core/core_basic_window.c, line for line. Nothing here needed
|
|
;;;; anything the language did not already have, which is the point of doing it
|
|
;;;; first: if this one does not run, none of the others will either.
|
|
;;;;
|
|
;;;; The one structural difference from the C is the loop: the C writes
|
|
;;;; `while (!WindowShouldClose())` and Flan has `until`, which is the same
|
|
;;;; thing without the negation. sand.flan does likewise.
|
|
;;;;
|
|
;;;; `defer` closes the window. It is function-scoped — it runs when `main`
|
|
;;;; returns and not at the end of any inner block — which is exactly what the
|
|
;;;; C's trailing CloseWindow() means here.
|
|
|
|
(import rl "vendor:raylib")
|
|
|
|
(defconst screen-width 800)
|
|
(defconst screen-height 450)
|
|
|
|
(defn main [] ()
|
|
(rl/init-window screen-width screen-height
|
|
"raylib [core] example - basic window")
|
|
(defer (rl/close-window))
|
|
|
|
(rl/set-target-fps 60)
|
|
|
|
(until (rl/window-should-close?)
|
|
(rl/with-drawing
|
|
(rl/clear-background rl/raywhite)
|
|
(rl/draw-text "Congrats! You created your first window!" 190 200 20
|
|
rl/lightgray))))
|