[wgsl] remove Pest grammar

grammars/wgsl.pest

@@ -1,189 +0,0 @@
-translation_unit = _{ SOI ~ global_decl* ~ EOI }
-
-global_decl = {
-      ";"
-    | import_decl ~ ";"
-    | global_variable_decl ~ ";"
-    | global_constant_decl ~ ";"
-    | entry_point_decl ~ ";"
-    | type_alias ~ ";"
-    | function_decl
-}
-
-import_decl = { "import" ~ string_literal ~ "as" ~ (ident ~ "::")* ~ ident}
-
-global_variable_decl = {
-    variable_decoration_list ~ variable_decl
-  | variable_decoration_list ~ variable_decl ~ "=" ~ const_expr
-}
-
-global_constant_decl = { "const" ~ variable_ident_decl ~ "=" ~ const_expr }
-
-variable_decoration_list = { "[[" ~ (variable_decoration ~ ",")* ~ variable_decoration ~ "]]" }
-
-variable_decoration = _{
-    "location" ~ location_decoration
-    | "builtin" ~ builtin_decoration
-//  | BUILTIN builtin_decoration
-//  | BINDING INT_LITERAL
-//  | SET INT_LITERAL
-}
-
-location_decoration = { int_literal }
-builtin_decoration = {
-    "position"
-  | "vertex_idx"
-}
-
-variable_decl = { "var" ~ variable_storage_decoration? ~ variable_ident_decl }
-variable_storage_decoration = _{ "<" ~ storage_class ~ ">" }
-variable_ident_decl = { ident ~ ":" ~ type_decl }
-
-type_alias = {
-    "type" ~ ident ~ "=" ~ type_decl
-  | "type" ~ ident ~ "=" ~ struct_decl
-}
-
-struct_decl = { struct_decoration_decl? ~ "struct" ~ struct_body_decl }
-
-struct_decoration_decl = { "[[" ~ struct_decoration ~ "]]" }
-
-struct_decoration = {
-    "block"
-}
-
-struct_body_decl = { "{" ~ struct_member* ~ "}" }
-struct_member = { struct_member_decoration_decl? ~ variable_ident_decl ~ ";" }
-struct_member_decoration_decl = { "[[" ~ (struct_member_decoration ~ ",")* ~ struct_member_decoration ~ "]]" }
-struct_member_decoration = {
-    "offset" ~ uint_literal
-}
-
-function_decl = { function_header ~ body_stmt }
-function_header = { "fn" ~ ident ~ "(" ~ param_list ~ ")" ~ "->" ~ function_type_decl }
-function_type_decl = _{ "void" | type_decl }
-param_list = { (variable_ident_decl ~ ",")* ~ variable_ident_decl | "" }
-body_stmt = { "{" ~ statement* ~ "}" }
-
-entry_point_decl = {
-    "entry_point" ~ pipeline_stage ~ ("as" ~ string_literal)? ~ "=" ~ ident
-}
-
-pipeline_stage = {
-    "vertex"
-  | "fragment"
-  | "compute"
-}
-
-storage_class = {
-    "in"
-  | "out"
-  | "uniform"
-//  | WORKGROUP
-//  | UNIFORM_CONSTANT
-  | "storage_buffer"
-//  | IMAGE
-  | "private"
-  | "function"
-}
-
-const_literal = {
-    bool_literal
-  | float_literal
-  | int_literal
-  | uint_literal
-}
-
-const_expr = {
-      const_literal
-    | type_decl ~ "(" ~ (const_expr ~ ",")? ~ const_expr ~ ")"
-}
-
-type_pointer_kind = { "ptr" }
-type_array_kind = { "array" }
-type_vec_kind = { "vec2" | "vec3" | "vec4" }
-type_mat_kind = { "mat2x2" | "mat3x3" | "mat4x4" }
-
-type_decl = {
-      scalar_type
-    | type_vec_kind ~ "<" ~ type_decl ~ ">"
-    | type_pointer_kind  ~ "<" ~ storage_class ~ "," ~ type_decl ~ ">"
-    | type_array_kind ~ "<" ~ type_decl ~ "," ~ uint_literal ~ ">"
-    | type_array_kind ~ "<" ~ type_decl ~ ">"
-    | type_mat_kind ~ "<" ~ type_decl ~ ">"
-    | ident
-}
-
-scalar_type = {
-    "bool"
-  | "f32"
-  | "i32"
-  | "u32"
-}
-
-return_statement = { "return" ~ logical_or_expression? }
-assignment_statement = { ident ~ "=" ~ logical_or_expression }
-
-statement = {
-    ";"
-  | return_statement ~ ";"
-//  | if_stmt
-//  | unless_stmt
-//  | regardless_stmt
-//  | switch_stmt
-//  | loop_stmt
-  | variable_statement ~ ";"
-//  | break_stmt ~ ";"
-//  | continue_stmt ~ ";"
-//  | KILL ~ ";"
-//  | NOP ~ ";"
-  | assignment_statement ~ ";"
-}
-
-variable_statement = _{
-    variable_decl ~ "=" ~ logical_or_expression
-  | "const" ~ variable_ident_decl ~ "=" ~ logical_or_expression
-  | variable_decl
-}
-
-primary_expression = _{
-    typed_expression
-  | const_expr
-  | paren_rhs_stmt
-  | ident
-}
-
-unary_expression = _{
-    primary_expression
-}
-
-multiplicative_expression = { unary_expression ~ ("*" ~ unary_expression)* }
-additive_expression = { multiplicative_expression ~ ("+" ~ multiplicative_expression)* }
-shift_expression = _{
-    additive_expression
-}
-relational_expression = _{
-    shift_expression
-}
-
-equality_expression = { relational_expression ~ ("==" ~ relational_expression)* }
-and_expression = { equality_expression ~ ("&" ~ equality_expression)* }
-exclusive_or_expression = { and_expression ~ ("^" ~ and_expression)* }
-inclusive_or_expression = { exclusive_or_expression ~ ("|" ~ exclusive_or_expression)* }
-logical_and_expression = { inclusive_or_expression ~ ("&&" ~ inclusive_or_expression)* }
-logical_or_expression = { logical_and_expression ~ ("||" ~ logical_and_expression)* }
-
-paren_rhs_stmt = _{ "(" ~ logical_or_expression ~ ")" }
-
-typed_expression = { type_decl ~ "(" ~ argument_expression_list ~ ")" }
-argument_expression_list = _{ (logical_or_expression ~ ",")* ~ logical_or_expression }
-
-ident = @{ ASCII_ALPHA ~ (ASCII_ALPHANUMERIC | "_")* }
-int_literal = @{ ("-"? ~ "0x" ~ ASCII_HEX_DIGIT+) | "0" | ("-"? ~ ASCII_NONZERO_DIGIT ~ ASCII_DIGIT*) }
-uint_literal = @{ ("0x" ~ ASCII_HEX_DIGIT+) | "0" | (ASCII_NONZERO_DIGIT ~ ASCII_DIGIT*) }
-float_literal = @{ "-"? ~ ASCII_DIGIT+ ~ ("." ~ ASCII_DIGIT*)? }
-bool_literal = @{ "true" | "false" }
-string_literal = @{ "\"" ~ ( "\"\"" | (!"\"" ~ ANY) )* ~ "\"" }
-
-WHITESPACE = _{ " " | "\t" | NEWLINE  }
-COMMENT = _{ "#" ~ (!NEWLINE ~ ANY)* }