SkSL::Lexer Class Reference

#include <SkSLLexer.h>

Classes
struct	Checkpoint

Public Member Functions
void	start (std::string_view text)
Token	next ()
Checkpoint	getCheckpoint () const
void	rewindToCheckpoint (Checkpoint checkpoint)

Detailed Description

Definition at line 123 of file SkSLLexer.h.

Member Function Documentation

getCheckpoint()

Checkpoint SkSL::Lexer::getCheckpoint ( ) const

inline

Definition at line 136 of file SkSLLexer.h.

{ return {fOffset}; }

next()

Token SkSL::Lexer::next

(

)

Definition at line 800 of file SkSLLexer.cpp.

                  {
    // Note that we cheat here: normally a lexer needs to worry about the case
    // where a token has a prefix which is not itself a valid token - for instance,
    // maybe we have a valid token 'while', but 'w', 'wh', etc. are not valid
    // tokens. Our grammar doesn't have this property, so we can simplify the logic
    // a bit.
    int32_t startOffset = fOffset;
    State state = 1;
    for (;;) {
        if (fOffset >= (int32_t)fText.length()) {
            if (startOffset == (int32_t)fText.length() || kAccepts[state] == 255) {
                return Token(Token::Kind::TK_END_OF_FILE, startOffset, 0);
            }
            break;
        }
        uint8_t c = (uint8_t)(fText[fOffset] - 9);
        if (c >= 118) {
            c = kInvalidChar;
        }
        State newState = get_transition(kMappings[c], state);
        if (!newState) {
            break;
        }
        state = newState;
        ++fOffset;
    }
    Token::Kind kind = (Token::Kind)kAccepts[state];
    return Token(kind, startOffset, fOffset - startOffset);
}

rewindToCheckpoint()

void SkSL::Lexer::rewindToCheckpoint ( Checkpoint  checkpoint )

inline

Definition at line 138 of file SkSLLexer.h.

{ fOffset = checkpoint.fOffset; }

start()

void SkSL::Lexer::start ( std::string_view  text )

inline

Definition at line 125 of file SkSLLexer.h.

                                    {
        fText = text;
        fOffset = 0;
    }

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The documentation for this class was generated from the following files:

• third_party/skia/src/sksl/SkSLLexer.h
• third_party/skia/src/sksl/SkSLLexer.cpp