We know by the time this check was reached that neither EPSILON nor the LL(1)
symbol are in the lookahead set from the current state. Since EPSILON is not
included, the state cannot see to the end of the rule and thus nextTokens
contains the complete set of valid LL(1) symbols from the current state. It is
therefore impossible for the LL(1) symbol to be "expected" when considering
lookahead with full context.
This change updates the default sync() strategy to match the strategy used
for selecting an alternative when prediction leaves the decision rule prior
to reaching a syntax error.
Closes#1545
This takes the example from
https://github.com/janyou/Antlr-Swift-Runtime/tree/master/Test and packages
it into an Xcode playground. This allows the user to interact with the
grammar directly inside Xcode, and serves as a live demo of the Swift support.
Update the docs to match.
This changes PRODUCT_BUNDLE_IDENTIFIER to read org.antlr.v4.swift.macos or
org.antlr.v4.swift.ios. This is similar to the naming scheme used in the Java
code.
The previous identifier was jlabs.Antlr4. I don't know what that refers to.
This comes from https://github.com/janyou/Antlr-Swift-Runtime and is
marked Copyright (c) 2015 janyou on top of the BSD license and Copyrights
for Terence Parr and Sam Harwell derived from the original ANTLR source.
Sam Harwell
Akos Kiss
Terence Parr
janyou
Ewan Mellor
hanjoes