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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKSL_TOKEN
#define SKSL_TOKEN
#include "SkSLPosition.h"
#include "SkSLUtil.h"
namespace SkSL {
#undef IN
#undef OUT
#undef CONST
/**
* Represents a lexical analysis token. Token is generally only used during the parse process, but
* Token::Kind is also used to represent operator kinds.
*/
struct Token {
enum Kind {
END_OF_FILE,
IDENTIFIER,
INT_LITERAL,
FLOAT_LITERAL,
TRUE_LITERAL,
FALSE_LITERAL,
LPAREN,
RPAREN,
LBRACE,
RBRACE,
LBRACKET,
RBRACKET,
DOT,
COMMA,
PLUSPLUS,
MINUSMINUS,
PLUS,
MINUS,
STAR,
SLASH,
PERCENT,
SHL,
SHR,
BITWISEOR,
BITWISEXOR,
BITWISEAND,
LOGICALOR,
LOGICALXOR,
LOGICALAND,
NOT,
QUESTION,
COLON,
EQ,
EQEQ,
NEQ,
GT,
LT,
GTEQ,
LTEQ,
PLUSEQ,
MINUSEQ,
STAREQ,
SLASHEQ,
PERCENTEQ,
SHLEQ,
SHREQ,
BITWISEOREQ,
BITWISEXOREQ,
BITWISEANDEQ,
LOGICALOREQ,
LOGICALXOREQ,
LOGICALANDEQ,
SEMICOLON,
IF,
ELSE,
FOR,
WHILE,
DO,
RETURN,
BREAK,
CONTINUE,
DISCARD,
IN,
OUT,
INOUT,
CONST,
LOWP,
MEDIUMP,
HIGHP,
UNIFORM,
FLAT,
NOPERSPECTIVE,
STRUCT,
LAYOUT,
DIRECTIVE,
PRECISION,
INVALID_TOKEN
};
static std::string OperatorName(Kind kind) {
switch (kind) {
case Token::PLUS: return "+";
case Token::MINUS: return "-";
case Token::STAR: return "*";
case Token::SLASH: return "/";
case Token::PERCENT: return "%";
case Token::SHL: return "<<";
case Token::SHR: return ">>";
case Token::LOGICALAND: return "&&";
case Token::LOGICALOR: return "||";
case Token::LOGICALXOR: return "^^";
case Token::BITWISEAND: return "&";
case Token::BITWISEOR: return "|";
case Token::BITWISEXOR: return "^";
case Token::EQ: return "=";
case Token::EQEQ: return "==";
case Token::NEQ: return "!=";
case Token::LT: return "<";
case Token::GT: return ">";
case Token::LTEQ: return "<=";
case Token::GTEQ: return ">=";
case Token::PLUSEQ: return "+=";
case Token::MINUSEQ: return "-=";
case Token::STAREQ: return "*=";
case Token::SLASHEQ: return "/=";
case Token::PERCENTEQ: return "%=";
case Token::SHLEQ: return "<<=";
case Token::SHREQ: return ">>=";
case Token::LOGICALANDEQ: return "&&=";
case Token::LOGICALOREQ: return "||=";
case Token::LOGICALXOREQ: return "^^=";
case Token::BITWISEANDEQ: return "&=";
case Token::BITWISEOREQ: return "|=";
case Token::BITWISEXOREQ: return "^=";
case Token::PLUSPLUS: return "++";
case Token::MINUSMINUS: return "--";
case Token::NOT: return "!";
default:
ABORT("unsupported operator: %d\n", kind);
}
}
Token() {
}
Token(Position position, Kind kind, std::string text)
: fPosition(position)
, fKind(kind)
, fText(std::move(text)) {}
Position fPosition;
Kind fKind;
std::string fText;
};
} // namespace
#endif
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