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Allow mutable function arguments

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This commit is contained in:
Nikita Lisitsa 2026-05-07 13:47:15 +03:00
parent 79838a1bb3
commit d146ec69fd
2 changed files with 25 additions and 25 deletions
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25
examples/raytracer.psl
View file

@ -19,12 +19,11 @@ func print_byte(c: u8):
foreign func putchar(c: i32) -> i32 foreign func putchar(c: i32) -> i32
putchar(c as i32) putchar(c as i32)
func print_str(str: u8*): func print_str(mut str: u8*):
// Don't use puts() because it adds a newline // Don't use puts() because it adds a newline
mut p = str while *str != 0ub:
while *p != 0ub: print_byte(*str)
print_byte(*p) str += 1
p += 1
func print_i32(x: i32): func print_i32(x: i32):
if x < 0: if x < 0:
@ -35,7 +34,7 @@ func print_i32(x: i32):
print_i32(x / 10) print_i32(x / 10)
print_byte('0' + (x % 10 as u8)) print_byte('0' + (x % 10 as u8))
func print_f32(x: f32): func print_f32(mut x: f32):
if x < 0.0: if x < 0.0:
print_byte('-') print_byte('-')
print_f32(-x) print_f32(-x)
@ -44,14 +43,14 @@ func print_f32(x: f32):
let xfloor = floor(x) let xfloor = floor(x)
print_i32(xfloor) print_i32(xfloor)
print_byte('.') print_byte('.')
mut y = x - (xfloor as f32) x -= (xfloor as f32)
// Print fractional part // Print fractional part
mut i = 0 mut i = 0
while i < 3: while i < 3:
y = y * 10.0 x = x * 10.0
let yfloor = floor(y) let xfloor = floor(x)
print_byte('0' + (yfloor as u8)) print_byte('0' + (xfloor as u8))
y = y - (yfloor as f32) x -= (xfloor as f32)
i = i + 1 i = i + 1
func print_vec3(v: vec3): func print_vec3(v: vec3):
@ -108,8 +107,8 @@ struct file:
func open(path: u8*, mode: u8) -> file*: func open(path: u8*, mode: u8) -> file*:
foreign func fopen(path: u8*, mode: u8*) -> file* foreign func fopen(path: u8*, mode: u8*) -> file*
// A hack to turn a single u8 into a zero-terminated array // A hack to turn a single u8 into a zero-terminated array
let mode_wide = mode as u32 let mode_wide = [mode, 0ub]
return fopen(path, &mode as u8*) return fopen(path, &mode_wide as u8*)
func close(file: file*): func close(file: file*):
foreign func fclose(file: file*) -> i32 foreign func fclose(file: file*) -> i32

1
libs/parser/rules/pslang.y
View file

@ -275,6 +275,7 @@ nonempty_function_declaration_argument_list
function_declaration_single_argument function_declaration_single_argument
: name colon type_expression { $$ = ast::function_declaration::argument{ast::value_category::constant, $1, std::make_unique<ast::type>($3), @$}; } : name colon type_expression { $$ = ast::function_declaration::argument{ast::value_category::constant, $1, std::make_unique<ast::type>($3), @$}; }
| mut name colon type_expression { $$ = ast::function_declaration::argument{ast::value_category::_mutable, $2, std::make_unique<ast::type>($4), @$}; }
; ;
function_return_type function_return_type