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package shader
Token :: struct {
kind: Token_Kind,
text: string,
span: Source_Span,
}
Token_Kind :: enum {
// Special
EOF,
Invalid,
// Literals
Integer,
Float,
String,
Identifier,
// Keywords
KW_Function,
KW_End,
KW_Let,
KW_Var,
KW_Return,
KW_If,
KW_Then,
KW_Elseif,
KW_Else,
KW_For,
KW_While,
KW_Do,
KW_In,
KW_And,
KW_Or,
KW_Not,
KW_True,
KW_False,
KW_Struct,
KW_Uniform,
KW_Buffer,
KW_Const,
KW_Storage,
KW_Shared,
KW_Discard,
KW_Break,
KW_Continue,
// Symbols
Lparen, // (
Rparen, // )
Lbracket, // [
Rbracket, // ]
Lbrace, // {
Rbrace, // }
Dot, // .
Comma, // ,
Colon, // :
Arrow, // ->
Eq, // =
Eq_Eq, // ==
Not_Eq, // !=
Lt, // <
Gt, // >
Lt_Eq, // <=
Gt_Eq, // >=
Plus, // +
Minus, // -
Star, // *
Slash, // /
Percent, // %
At, // @
Hash, // #
}
keyword_kind :: proc(text: string) -> (Token_Kind, bool) {
switch text {
case "function": return .KW_Function, true
case "end": return .KW_End, true
case "let": return .KW_Let, true
case "var": return .KW_Var, true
case "return": return .KW_Return, true
case "if": return .KW_If, true
case "then": return .KW_Then, true
case "elseif": return .KW_Elseif, true
case "else": return .KW_Else, true
case "for": return .KW_For, true
case "while": return .KW_While, true
case "do": return .KW_Do, true
case "in": return .KW_In, true
case "and": return .KW_And, true
case "or": return .KW_Or, true
case "not": return .KW_Not, true
case "true": return .KW_True, true
case "false": return .KW_False, true
case "struct": return .KW_Struct, true
case "uniform": return .KW_Uniform, true
case "buffer": return .KW_Buffer, true
case "const": return .KW_Const, true
case "storage": return .KW_Storage, true
case "shared": return .KW_Shared, true
case "discard": return .KW_Discard, true
case "break": return .KW_Break, true
case "continue": return .KW_Continue, true
}
return .Invalid, false
}
token_kind_to_string :: proc(kind: Token_Kind) -> string {
#partial switch kind {
case .EOF: return "end of file"
case .Invalid: return "invalid token"
case .Integer: return "integer"
case .Float: return "float"
case .String: return "string"
case .Identifier: return "identifier"
case .KW_Function: return "'function'"
case .KW_End: return "'end'"
case .KW_Let: return "'let'"
case .KW_Var: return "'var'"
case .KW_Return: return "'return'"
case .KW_If: return "'if'"
case .KW_Then: return "'then'"
case .KW_Elseif: return "'elseif'"
case .KW_Else: return "'else'"
case .KW_For: return "'for'"
case .KW_While: return "'while'"
case .KW_Do: return "'do'"
case .KW_In: return "'in'"
case .KW_And: return "'and'"
case .KW_Or: return "'or'"
case .KW_Not: return "'not'"
case .KW_True: return "'true'"
case .KW_False: return "'false'"
case .KW_Struct: return "'struct'"
case .KW_Uniform: return "'uniform'"
case .KW_Buffer: return "'buffer'"
case .KW_Const: return "'const'"
case .KW_Storage: return "'storage'"
case .KW_Shared: return "'shared'"
case .KW_Discard: return "'discard'"
case .KW_Break: return "'break'"
case .KW_Continue: return "'continue'"
case .Lparen: return "'('"
case .Rparen: return "')'"
case .Lbracket: return "'['"
case .Rbracket: return "']'"
case .Lbrace: return "'{'"
case .Rbrace: return "'}'"
case .Dot: return "'.'"
case .Comma: return "','"
case .Colon: return "':'"
case .Arrow: return "'->'"
case .Eq: return "'='"
case .Eq_Eq: return "'=='"
case .Not_Eq: return "'!='"
case .Lt: return "'<'"
case .Gt: return "'>'"
case .Lt_Eq: return "'<='"
case .Gt_Eq: return "'>='"
case .Plus: return "'+'"
case .Minus: return "'-'"
case .Star: return "'*'"
case .Slash: return "'/'"
case .Percent: return "'%'"
case .At: return "'@'"
case .Hash: return "'#'"
}
return "unknown"
}