Package com.intellij.lang

Class PsiBuilderUtil

java.lang.Object

com.intellij.lang.PsiBuilderUtil

public class PsiBuilderUtil
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static void	advance(PsiBuilder builder, int count) Advances lexer by given number of tokens (but not beyond the end of token stream).
static void	drop(PsiBuilder.Marker... markers) Release group of allocated markers.
static boolean	expect(PsiBuilder builder, IElementType expectedType) Advances lexer if current token is of expected type, does nothing otherwise.
static boolean	expect(PsiBuilder builder, TokenSet expectedTypes) Advances lexer if current token is of expected type, does nothing otherwise.
static boolean	hasProperBraceBalance(java.lang.CharSequence text, Lexer lexer, IElementType leftBrace, IElementType rightBrace) Checks if `text` looks like a proper block.
static PsiBuilder.Marker	parseBlockLazy(PsiBuilder builder, IElementType leftBrace, IElementType rightBrace, IElementType codeBlock) tries to parse a code block with corresponding left and right braces.
static java.lang.CharSequence	rawTokenText(PsiBuilder builder, int index)
static void	rollbackTo(PsiBuilder.Marker marker) Rolls the lexer back to position before given marker - if not null.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

advance

public static void advance(PsiBuilder builder,
                           int count)

Advances lexer by given number of tokens (but not beyond the end of token stream).

Parameters:

builder - PSI builder to operate on.

count - number of tokens to skip.

expect

public static boolean expect(PsiBuilder builder,
                             IElementType expectedType)

Advances lexer if current token is of expected type, does nothing otherwise.

Parameters:

builder - PSI builder to operate on.

expectedType - expected token.

Returns:

true if token matches, false otherwise.

expect

public static boolean expect(PsiBuilder builder,
                             TokenSet expectedTypes)

Advances lexer if current token is of expected type, does nothing otherwise.

Parameters:

builder - PSI builder to operate on.

expectedTypes - expected token types.

Returns:

true if token matches, false otherwise.

drop

public static void drop(PsiBuilder.Marker... markers)

Release group of allocated markers.

Parameters:

markers - markers to drop.

rollbackTo

public static void rollbackTo(PsiBuilder.Marker marker)

Rolls the lexer back to position before given marker - if not null.

Parameters:

marker - marker to roll back to.

rawTokenText

public static java.lang.CharSequence rawTokenText(PsiBuilder builder,
                                                  int index)

parseBlockLazy

public static PsiBuilder.Marker parseBlockLazy(PsiBuilder builder,
                                               IElementType leftBrace,
                                               IElementType rightBrace,
                                               IElementType codeBlock)

tries to parse a code block with corresponding left and right braces.

Returns:

collapsed marker of the block or `null` if there is no code block at all.

hasProperBraceBalance

public static boolean hasProperBraceBalance(java.lang.CharSequence text,
                                            Lexer lexer,
                                            IElementType leftBrace,
                                            IElementType rightBrace)

Checks if `text` looks like a proper block. In particular it (1) checks brace balance (2) verifies that the block's closing brace is the last token

Parameters:

text - - text to check

lexer - - lexer to use

leftBrace - - left brace element type

rightBrace - - right brace element type

Returns:

true if `text` passes the checks