You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
407 lines
12 KiB
Python
407 lines
12 KiB
Python
"""
|
|
pygments.lexers.wgsl
|
|
~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Lexer for the WebGPU Shading Language.
|
|
|
|
:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
|
|
:license: BSD, see LICENSE for details.
|
|
"""
|
|
|
|
from pygments.lexer import RegexLexer, include, words, default
|
|
from pygments.token import Comment, Operator, Keyword, Name, \
|
|
Number, Punctuation, Whitespace
|
|
from pygments import unistring as uni
|
|
|
|
__all__ = ['WgslLexer']
|
|
|
|
LF = '\\u000a'
|
|
VT = '\\u000b'
|
|
FF = '\\u000c'
|
|
CR = '\\u000d'
|
|
NextLine = '\\u0085'
|
|
LineSep = '\\u2028'
|
|
ParaSep = '\\u2029'
|
|
LineEndCodePoints = [LF,VT,FF,CR,NextLine,LineSep,ParaSep]
|
|
NotLineEndRE = '[^' + "".join(LineEndCodePoints) + ']'
|
|
LineEndRE = '[' + "".join(LineEndCodePoints) + ']'
|
|
|
|
# https://www.w3.org/TR/WGSL/#syntax-ident_pattern_token
|
|
ident_pattern_token = f'([{uni.xid_start}][{uni.xid_continue}]+)|[{uni.xid_start}]'
|
|
|
|
|
|
class WgslLexer(RegexLexer):
|
|
"""
|
|
Lexer for the WebGPU Shading Language.
|
|
"""
|
|
name = 'WebGPU Shading Language'
|
|
url = 'https://www.w3.org/TR/WGSL/'
|
|
aliases = ['wgsl']
|
|
filenames = ['*.wgsl']
|
|
mimetypes = ['text/wgsl']
|
|
version_added = '2.15'
|
|
|
|
# https://www.w3.org/TR/WGSL/#var-and-value
|
|
keyword_decl = (words('var let const override'.split(),suffix=r'\b'), Keyword.Declaration)
|
|
# https://www.w3.org/TR/WGSL/#keyword-summary
|
|
keywords = (words("""
|
|
alias
|
|
break
|
|
case
|
|
const_assert
|
|
continue
|
|
continuing
|
|
default
|
|
diagnostic
|
|
discard
|
|
else
|
|
enable
|
|
false
|
|
fn
|
|
for
|
|
if
|
|
loop
|
|
requires
|
|
return
|
|
struct
|
|
switch
|
|
true
|
|
while
|
|
""".split(), suffix=r'\b'), Keyword)
|
|
|
|
# https://www.w3.org/TR/WGSL/#reserved-words
|
|
keyword_reserved = (words("""
|
|
NULL
|
|
Self
|
|
abstract
|
|
active
|
|
alignas
|
|
alignof
|
|
as
|
|
asm
|
|
asm_fragment
|
|
async
|
|
attribute
|
|
auto
|
|
await
|
|
become
|
|
binding_array
|
|
cast
|
|
catch
|
|
class
|
|
co_await
|
|
co_return
|
|
co_yield
|
|
coherent
|
|
column_major
|
|
common
|
|
compile
|
|
compile_fragment
|
|
concept
|
|
const_cast
|
|
consteval
|
|
constexpr
|
|
constinit
|
|
crate
|
|
debugger
|
|
decltype
|
|
delete
|
|
demote
|
|
demote_to_helper
|
|
do
|
|
dynamic_cast
|
|
enum
|
|
explicit
|
|
export
|
|
extends
|
|
extern
|
|
external
|
|
fallthrough
|
|
filter
|
|
final
|
|
finally
|
|
friend
|
|
from
|
|
fxgroup
|
|
get
|
|
goto
|
|
groupshared
|
|
highp
|
|
impl
|
|
implements
|
|
import
|
|
inline
|
|
instanceof
|
|
interface
|
|
layout
|
|
lowp
|
|
macro
|
|
macro_rules
|
|
match
|
|
mediump
|
|
meta
|
|
mod
|
|
module
|
|
move
|
|
mut
|
|
mutable
|
|
namespace
|
|
new
|
|
nil
|
|
noexcept
|
|
noinline
|
|
nointerpolation
|
|
noperspective
|
|
null
|
|
nullptr
|
|
of
|
|
operator
|
|
package
|
|
packoffset
|
|
partition
|
|
pass
|
|
patch
|
|
pixelfragment
|
|
precise
|
|
precision
|
|
premerge
|
|
priv
|
|
protected
|
|
pub
|
|
public
|
|
readonly
|
|
ref
|
|
regardless
|
|
register
|
|
reinterpret_cast
|
|
require
|
|
resource
|
|
restrict
|
|
self
|
|
set
|
|
shared
|
|
sizeof
|
|
smooth
|
|
snorm
|
|
static
|
|
static_assert
|
|
static_cast
|
|
std
|
|
subroutine
|
|
super
|
|
target
|
|
template
|
|
this
|
|
thread_local
|
|
throw
|
|
trait
|
|
try
|
|
type
|
|
typedef
|
|
typeid
|
|
typename
|
|
typeof
|
|
union
|
|
unless
|
|
unorm
|
|
unsafe
|
|
unsized
|
|
use
|
|
using
|
|
varying
|
|
virtual
|
|
volatile
|
|
wgsl
|
|
where
|
|
with
|
|
writeonly
|
|
yield
|
|
""".split(), suffix=r'\b'), Keyword.Reserved)
|
|
|
|
# https://www.w3.org/TR/WGSL/#predeclared-enumerants
|
|
predeclared_enums = (words("""
|
|
read write read_write
|
|
function private workgroup uniform storage
|
|
perspective linear flat
|
|
center centroid sample
|
|
vertex_index instance_index position front_facing frag_depth
|
|
local_invocation_id local_invocation_index
|
|
global_invocation_id workgroup_id num_workgroups
|
|
sample_index sample_mask
|
|
rgba8unorm
|
|
rgba8snorm
|
|
rgba8uint
|
|
rgba8sint
|
|
rgba16uint
|
|
rgba16sint
|
|
rgba16float
|
|
r32uint
|
|
r32sint
|
|
r32float
|
|
rg32uint
|
|
rg32sint
|
|
rg32float
|
|
rgba32uint
|
|
rgba32sint
|
|
rgba32float
|
|
bgra8unorm
|
|
""".split(), suffix=r'\b'), Name.Builtin)
|
|
|
|
# https://www.w3.org/TR/WGSL/#predeclared-types
|
|
predeclared_types = (words("""
|
|
bool
|
|
f16
|
|
f32
|
|
i32
|
|
sampler sampler_comparison
|
|
texture_depth_2d
|
|
texture_depth_2d_array
|
|
texture_depth_cube
|
|
texture_depth_cube_array
|
|
texture_depth_multisampled_2d
|
|
texture_external
|
|
texture_external
|
|
u32
|
|
""".split(), suffix=r'\b'), Name.Builtin)
|
|
|
|
# https://www.w3.org/TR/WGSL/#predeclared-types
|
|
predeclared_type_generators = (words("""
|
|
array
|
|
atomic
|
|
mat2x2
|
|
mat2x3
|
|
mat2x4
|
|
mat3x2
|
|
mat3x3
|
|
mat3x4
|
|
mat4x2
|
|
mat4x3
|
|
mat4x4
|
|
ptr
|
|
texture_1d
|
|
texture_2d
|
|
texture_2d_array
|
|
texture_3d
|
|
texture_cube
|
|
texture_cube_array
|
|
texture_multisampled_2d
|
|
texture_storage_1d
|
|
texture_storage_2d
|
|
texture_storage_2d_array
|
|
texture_storage_3d
|
|
vec2
|
|
vec3
|
|
vec4
|
|
""".split(), suffix=r'\b'), Name.Builtin)
|
|
|
|
# Predeclared type aliases for vectors
|
|
# https://www.w3.org/TR/WGSL/#vector-types
|
|
predeclared_type_alias_vectors = (words("""
|
|
vec2i vec3i vec4i
|
|
vec2u vec3u vec4u
|
|
vec2f vec3f vec4f
|
|
vec2h vec3h vec4h
|
|
""".split(), suffix=r'\b'), Name.Builtin)
|
|
|
|
# Predeclared type aliases for matrices
|
|
# https://www.w3.org/TR/WGSL/#matrix-types
|
|
predeclared_type_alias_matrices = (words("""
|
|
mat2x2f mat2x3f mat2x4f
|
|
mat3x2f mat3x3f mat3x4f
|
|
mat4x2f mat4x3f mat4x4f
|
|
mat2x2h mat2x3h mat2x4h
|
|
mat3x2h mat3x3h mat3x4h
|
|
mat4x2h mat4x3h mat4x4h
|
|
""".split(), suffix=r'\b'), Name.Builtin)
|
|
|
|
tokens = {
|
|
'blankspace': [
|
|
# https://www.w3.org/TR/WGSL/#blankspace
|
|
(r'[\u0020\u0009\u000a\u000b\u000c\u000d\u0085\u200e\u200f\u2028\u2029]+', Whitespace),
|
|
],
|
|
'comments': [
|
|
# Line ending comments
|
|
# Match up CR/LF pair first.
|
|
(rf'//{NotLineEndRE}*{CR}{LF}', Comment.Single),
|
|
(rf'//{NotLineEndRE}*{LineEndRE}', Comment.Single),
|
|
(r'/\*', Comment.Multiline, 'block_comment'),
|
|
],
|
|
'attribute': [
|
|
include('blankspace'),
|
|
include('comments'),
|
|
(ident_pattern_token, Name.Decorator,'#pop'),
|
|
default('#pop'),
|
|
],
|
|
'root': [
|
|
include('blankspace'),
|
|
include('comments'),
|
|
|
|
# Attributes.
|
|
# https://www.w3.org/TR/WGSL/#attributes
|
|
# Mark the '@' and the attribute name as a decorator.
|
|
(r'@', Name.Decorator, 'attribute'),
|
|
|
|
# Keywords
|
|
(r'(true|false)\b', Keyword.Constant),
|
|
keyword_decl,
|
|
keywords,
|
|
keyword_reserved,
|
|
|
|
# Predeclared
|
|
predeclared_enums,
|
|
predeclared_types,
|
|
predeclared_type_generators,
|
|
predeclared_type_alias_vectors,
|
|
predeclared_type_alias_matrices,
|
|
|
|
# Decimal float literals
|
|
# https://www.w3.org/TR/WGSL/#syntax-decimal_float_literal
|
|
# 0, with type-specifying suffix.
|
|
(r'0[fh]', Number.Float),
|
|
# Other decimal integer, with type-specifying suffix.
|
|
(r'[1-9][0-9]*[fh]', Number.Float),
|
|
# Has decimal point, at least one digit after decimal.
|
|
(r'[0-9]*\.[0-9]+([eE][+-]?[0-9]+)?[fh]?', Number.Float),
|
|
# Has decimal point, at least one digit before decimal.
|
|
(r'[0-9]+\.[0-9]*([eE][+-]?[0-9]+)?[fh]?', Number.Float),
|
|
# Has at least one digit, and has an exponent.
|
|
(r'[0-9]+[eE][+-]?[0-9]+[fh]?', Number.Float),
|
|
|
|
# Hex float literals
|
|
# https://www.w3.org/TR/WGSL/#syntax-hex_float_literal
|
|
(r'0[xX][0-9a-fA-F]*\.[0-9a-fA-F]+([pP][+-]?[0-9]+[fh]?)?', Number.Float),
|
|
(r'0[xX][0-9a-fA-F]+\.[0-9a-fA-F]*([pP][+-]?[0-9]+[fh]?)?', Number.Float),
|
|
(r'0[xX][0-9a-fA-F]+[pP][+-]?[0-9]+[fh]?', Number.Float),
|
|
|
|
# Hexadecimal integer literals
|
|
# https://www.w3.org/TR/WGSL/#syntax-hex_int_literal
|
|
(r'0[xX][0-9a-fA-F]+[iu]?', Number.Hex),
|
|
# Decimal integer literals
|
|
# https://www.w3.org/TR/WGSL/#syntax-decimal_int_literal
|
|
# We need two rules here because 01 is not valid.
|
|
(r'[1-9][0-9]*[iu]?', Number.Integer),
|
|
(r'0[iu]?', Number.Integer), # Must match last.
|
|
|
|
# Operators and Punctuation
|
|
(r'[{}()\[\],\.;:]', Punctuation),
|
|
(r'->', Punctuation), # Return-type arrow
|
|
(r'[+\-*/%&|<>^!~=]', Operator),
|
|
|
|
# TODO: Treat context-depedendent names specially
|
|
# https://www.w3.org/TR/WGSL/#context-dependent-name
|
|
|
|
# Identifiers
|
|
(ident_pattern_token, Name),
|
|
|
|
# TODO: templates start and end tokens.
|
|
# https://www.w3.org/TR/WGSL/#template-lists-sec
|
|
],
|
|
'block_comment': [
|
|
# https://www.w3.org/TR/WGSL/#block-comment
|
|
(r'[^*/]+', Comment.Multiline),
|
|
(r'/\*', Comment.Multiline, '#push'),
|
|
(r'\*/', Comment.Multiline, '#pop'),
|
|
(r'[*/]', Comment.Multiline),
|
|
],
|
|
}
|