IsRegisterShift reports whether the token is one of the ARM register shift operators.

Make returns a Token with the given rune (ScanToken) and text representation.

NewInput returns an Input from the given path.

NewLexer returns a lexer for the named file and the given link context.

Tokenize turns a string into a list of Tokens; used to parse the -D flag and in tests.

-> Used on ARM for shift type 3, arithmetic right shift.

//go:build or +build comment.

included file started here.

<< Left shift.

@> Used on ARM for shift type 4, rotate right.

>> Logical right shift.

Input is the main input: a stack of readers and some macro definitions.

A Macro represents the definition of a #defined macro.

A Slice reads from a slice of Tokens.

A Stack is a stack of TokenReaders.

A Token is a scan token plus its string value.

A Tokenizer is a simple wrapping of text/scanner.Scanner, configured for our purposes and made a TokenReader.

A TokenReader is like a reader, but returns lex tokens of type Token.

A ScanToken represents an input item.