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Adding visitor tests.

This commit is contained in:
Hanzhou Shi 2017-03-22 21:18:32 -07:00
parent 91ce56c7fd
commit e334b0df86
6 changed files with 322 additions and 24 deletions
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97
runtime/Swift/Antlr4.xcodeproj/project.pbxproj
View File

@ -15,6 +15,17 @@
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@ -352,14 +363,28 @@
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DBBAE58E1E22DCAC00C2FEA6 /* ANTLRErrorListener.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ANTLRErrorListener.swift; sourceTree = "<group>"; };
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DBBAE5901E22DCAC00C2FEA6 /* ANTLRFileStream.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ANTLRFileStream.swift; sourceTree = "<group>"; };
@ -574,9 +599,11 @@
DB4EB8B21E2CBA240095F402 /* gen */,
DB0991951E22DE6000FE71AA /* TokenStreamTests.swift */,
DBF000B21E7F59B3006DB586 /* TokenStreamRewriterTests.swift */,
DBA2FF071E837ED900BB60D9 /* VisitorTests.swift */,
DB4EB8A41E2CB1B60095F402 /* VisitorBasic.g4 */,
DBF000B51E7F614D006DB586 /* LexerA.g4 */,
DBF000BD1E7F64DE006DB586 /* LexerB.g4 */,
DBA2FEF81E837DB500BB60D9 /* VisitorCalc.g4 */,
);
path = Antlr4Tests;
sourceTree = "<group>";
@ -595,7 +622,19 @@
DBA2FEEC1E837D1F00BB60D9 /* VisitorBasicLexer.swift */,
DBA2FEED1E837D1F00BB60D9 /* VisitorBasicLexer.tokens */,
DBA2FEEE1E837D1F00BB60D9 /* VisitorBasicLexerATN.swift */,
DBA2FF0D1E83810C00BB60D9 /* VisitorBasicBaseVisitor.swift */,
DBA2FEEF1E837D1F00BB60D9 /* VisitorBasicListener.swift */,
DBA2FF091E83802500BB60D9 /* VisitorBasicVisitor.swift */,
DBA2FEF91E837E2D00BB60D9 /* VisitorCalc.tokens */,
DBA2FEFA1E837E2D00BB60D9 /* VisitorCalcBaseListener.swift */,
DBA2FEFB1E837E2D00BB60D9 /* VisitorCalcLexer.swift */,
DBA2FEFC1E837E2D00BB60D9 /* VisitorCalcLexer.tokens */,
DBA2FEFD1E837E2D00BB60D9 /* VisitorCalcLexerATN.swift */,
DBA2FEFE1E837E2D00BB60D9 /* VisitorCalcListener.swift */,
DBA2FEFF1E837E2D00BB60D9 /* VisitorCalcParser.swift */,
DBA2FF001E837E2D00BB60D9 /* VisitorCalcParserATN.swift */,
DBA2FF0A1E83802600BB60D9 /* VisitorCalcVisitor.swift */,
DBA2FF0E1E83810C00BB60D9 /* VisitorCalcBaseVisitor.swift */,
DBA2FEF01E837D1F00BB60D9 /* VisitorBasicParser.swift */,
DBA2FEF11E837D1F00BB60D9 /* VisitorBasicParserATN.swift */,
);
@ -1003,15 +1042,38 @@
files = (
);
inputPaths = (
"$(SRCROOT)/VisitorBasic.g4",
"$(SRCROOT)/LexerA.g4",
"$(SRCROOT)/LexerB.g4",
);
outputPaths = (
"$(DERIVED_FILE_DIR)/LexerA.swift",
"$(DERIVED_FILE_DIR)/LexerA.tokens",
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"$(DERIVED_FILE_DIR)/LexerB.tokens",
"$(DERIVED_FILE_DIR)/LexerBATN.swift",
"$(DERIVED_FILE_DIR)/VisitorBasic.tokens",
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"$(DERIVED_FILE_DIR)/VisitorBasicLexer.tokens",
"$(DERIVED_FILE_DIR)/VisitorBasicLexerATN.swift",
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"$(DERIVED_FILE_DIR)/VisitorBasicVisitor.swift",
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"$(DERIVED_FILE_DIR)/VisitorCalcListener.swift",
"$(DERIVED_FILE_DIR)/VisitorCalcParser.swift",
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runOnlyForDeploymentPostprocessing = 0;
shellPath = /bin/sh;
shellScript = "echo \"Generating parser in $DERIVED_FILE_DIR\"\njava -jar ~/.m2/repository/org/antlr/antlr4/4.7-SNAPSHOT/antlr4-4.7-SNAPSHOT-complete.jar -Dlanguage=Swift Tests/Antlr4Tests/VisitorBasic.g4 -o $DERIVED_FILE_DIR\njava -jar ~/.m2/repository/org/antlr/antlr4/4.7-SNAPSHOT/antlr4-4.7-SNAPSHOT-complete.jar -Dlanguage=Swift Tests/Antlr4Tests/LexerA.g4 -o $DERIVED_FILE_DIR\njava -jar ~/.m2/repository/org/antlr/antlr4/4.7-SNAPSHOT/antlr4-4.7-SNAPSHOT-complete.jar -Dlanguage=Swift Tests/Antlr4Tests/LexerB.g4 -o $DERIVED_FILE_DIR";
shellScript = "echo \"Generating parser in $DERIVED_FILE_DIR\"\njava -jar ~/.m2/repository/org/antlr/antlr4/4.7-SNAPSHOT/antlr4-4.7-SNAPSHOT-complete.jar -Dlanguage=Swift Tests/Antlr4Tests/LexerA.g4 -o $DERIVED_FILE_DIR\njava -jar ~/.m2/repository/org/antlr/antlr4/4.7-SNAPSHOT/antlr4-4.7-SNAPSHOT-complete.jar -Dlanguage=Swift Tests/Antlr4Tests/LexerB.g4 -o $DERIVED_FILE_DIR\njava -jar ~/.m2/repository/org/antlr/antlr4/4.7-SNAPSHOT/antlr4-4.7-SNAPSHOT-complete.jar -Dlanguage=Swift Tests/Antlr4Tests/VisitorCalc.g4 -visitor -o $DERIVED_FILE_DIR\njava -jar ~/.m2/repository/org/antlr/antlr4/4.7-SNAPSHOT/antlr4-4.7-SNAPSHOT-complete.jar -Dlanguage=Swift Tests/Antlr4Tests/VisitorBasic.g4 -visitor -o $DERIVED_FILE_DIR";
};
/* End PBXShellScriptBuildPhase section */
@ -1350,16 +1412,27 @@
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DBA2FEF71E837D1F00BB60D9 /* VisitorBasicParserATN.swift in Sources */,
DBA2FEF21E837D1F00BB60D9 /* VisitorBasicBaseListener.swift in Sources */,
DBA2FF081E837ED900BB60D9 /* VisitorTests.swift in Sources */,
DBA2FF031E837E2D00BB60D9 /* VisitorCalcLexerATN.swift in Sources */,
DBA2FEF51E837D1F00BB60D9 /* VisitorBasicListener.swift in Sources */,
DBA2FF0C1E83802600BB60D9 /* VisitorCalcVisitor.swift in Sources */,
DBA2FF061E837E2D00BB60D9 /* VisitorCalcParserATN.swift in Sources */,
DBF000B91E7F627D006DB586 /* LexerA.swift in Sources */,
DB09919D1E22DE9B00FE71AA /* TokenStreamTests.swift in Sources */,
DBA2FF051E837E2D00BB60D9 /* VisitorCalcParser.swift in Sources */,
DBA2FEF41E837D1F00BB60D9 /* VisitorBasicLexerATN.swift in Sources */,
DBA2FF0B1E83802600BB60D9 /* VisitorBasicVisitor.swift in Sources */,
DBA2FEF61E837D1F00BB60D9 /* VisitorBasicParser.swift in Sources */,
DBF000BB1E7F627D006DB586 /* LexerAATN.swift in Sources */,
DBA2FF021E837E2D00BB60D9 /* VisitorCalcLexer.swift in Sources */,
DBA2FEF31E837D1F00BB60D9 /* VisitorBasicLexer.swift in Sources */,
DBA2FF101E83810C00BB60D9 /* VisitorCalcBaseVisitor.swift in Sources */,
DBF000C31E7F6546006DB586 /* LexerBATN.swift in Sources */,
DBF000C11E7F6546006DB586 /* LexerB.swift in Sources */,
DBA2FF041E837E2D00BB60D9 /* VisitorCalcListener.swift in Sources */,
DBA2FF011E837E2D00BB60D9 /* VisitorCalcBaseListener.swift in Sources */,
DBF000B31E7F59B3006DB586 /* TokenStreamRewriterTests.swift in Sources */,
DBA2FF0F1E83810C00BB60D9 /* VisitorBasicBaseVisitor.swift in Sources */,
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runOnlyForDeploymentPostprocessing = 0;
};

12
runtime/Swift/Sources/Antlr4/BaseErrorListener.swift
View File

@ -9,9 +9,11 @@
///
/// - Sam Harwell
public class BaseErrorListener: ANTLRErrorListener {
open class BaseErrorListener: ANTLRErrorListener {
public init() {
}
public func syntaxError<T:ATNSimulator>(_ recognizer: Recognizer<T>,
open func syntaxError<T:ATNSimulator>(_ recognizer: Recognizer<T>,
_ offendingSymbol: AnyObject?,
_ line: Int,
_ charPositionInLine: Int,
@ -21,7 +23,7 @@ public class BaseErrorListener: ANTLRErrorListener {
}
public func reportAmbiguity(_ recognizer: Parser,
open func reportAmbiguity(_ recognizer: Parser,
_ dfa: DFA,
_ startIndex: Int,
_ stopIndex: Int,
@ -31,7 +33,7 @@ public class BaseErrorListener: ANTLRErrorListener {
}
public func reportAttemptingFullContext(_ recognizer: Parser,
open func reportAttemptingFullContext(_ recognizer: Parser,
_ dfa: DFA,
_ startIndex: Int,
_ stopIndex: Int,
@ -40,7 +42,7 @@ public class BaseErrorListener: ANTLRErrorListener {
}
public func reportContextSensitivity(_ recognizer: Parser,
open func reportContextSensitivity(_ recognizer: Parser,
_ dfa: DFA,
_ startIndex: Int,
_ stopIndex: Int,

9
runtime/Swift/Sources/Antlr4/tree/AbstractParseTreeVisitor.swift
View File

@ -16,7 +16,6 @@ open class AbstractParseTreeVisitor<T>: ParseTreeVisitor<T> {
* <p>The default implementation calls {@link org.antlr.v4.runtime.tree.ParseTree#accept} on the
* specified tree.</p>
*/
open override func visit(_ tree: ParseTree) -> T? {
return tree.accept(self)
}
@ -36,7 +35,6 @@ open class AbstractParseTreeVisitor<T>: ParseTreeVisitor<T> {
* the tree structure. Visitors that modify the tree should override this
* method to behave properly in respect to the specific algorithm in use.</p>
*/
open override func visitChildren(_ node: RuleNode) -> T? {
var result: T? = defaultResult()
let n: Int = node.getChildCount()
@ -60,7 +58,6 @@ open class AbstractParseTreeVisitor<T>: ParseTreeVisitor<T> {
* <p>The default implementation returns the result of
* {@link #defaultResult defaultResult}.</p>
*/
open override func visitTerminal(_ node: TerminalNode) -> T? {
return defaultResult()
}
@ -87,7 +84,7 @@ open class AbstractParseTreeVisitor<T>: ParseTreeVisitor<T> {
*
* @return The default value returned by visitor methods.
*/
internal func defaultResult() -> T? {
open func defaultResult() -> T? {
return nil
}
@ -110,7 +107,7 @@ open class AbstractParseTreeVisitor<T>: ParseTreeVisitor<T> {
*
* @return The updated aggregate result.
*/
internal func aggregateResult(_ aggregate: T?, _ nextResult: T?) -> T? {
open func aggregateResult(_ aggregate: T?, _ nextResult: T?) -> T? {
return nextResult
}
@ -138,7 +135,7 @@ open class AbstractParseTreeVisitor<T>: ParseTreeVisitor<T> {
* {@code false} to stop visiting children and immediately return the
* current aggregate result from {@link #visitChildren}.
*/
internal func shouldVisitNextChild(_ node: RuleNode, _ currentResult: T?) -> Bool {
open func shouldVisitNextChild(_ node: RuleNode, _ currentResult: T?) -> Bool {
return true
}

18
runtime/Swift/Tests/Antlr4Tests/VisitorCalc.g4 Normal file
View File

@ -0,0 +1,18 @@
grammar VisitorCalc;
s
: expr EOF
;
expr
: INT # number
| expr (MUL | DIV) expr # multiply
| expr (ADD | SUB) expr # add
;
INT : [0-9]+;
MUL : '*';
DIV : '/';
ADD : '+';
SUB : '-';
WS : [ \t]+ -> channel(HIDDEN);

207
runtime/Swift/Tests/Antlr4Tests/VisitorTests.swift Normal file
View File

@ -0,0 +1,207 @@
/// Copyright (c) 2012-2016 The ANTLR Project. All rights reserved.
/// Use of this file is governed by the BSD 3-clause license that
/// can be found in the LICENSE.txt file in the project root.
import XCTest
import Antlr4
class VisitorTests: XCTestCase {
///
/// This test verifies the basic behavior of visitors, with an emphasis on
/// {@link AbstractParseTreeVisitor#visitTerminal}.
///
func testVisitTerminalNode() throws {
let lexer = VisitorBasicLexer(ANTLRInputStream("A"))
let parser = try VisitorBasicParser(CommonTokenStream(lexer))
let context = try parser.s()
XCTAssertEqual("(s A <EOF>)", context.toStringTree(parser))
class Visitor: VisitorBasicBaseVisitor<String> {
override func visitTerminal(_ node: TerminalNode) -> String? {
return "\(node.getSymbol()!)\n"
}
override func defaultResult() -> String? {
return ""
}
override func aggregateResult(_ aggregate: String?, _ nextResult: String?) -> String? {
return aggregate! + nextResult!
}
}
let visitor = Visitor()
let result = visitor.visit(context)
let expected =
"[@0,0:0='A',<1>,1:0]\n" +
"[@1,1:0='<EOF>',<-1>,1:1]\n"
XCTAssertEqual(expected, result)
}
///
/// This test verifies the basic behavior of visitors, with an emphasis on
/// {@link AbstractParseTreeVisitor#visitErrorNode}.
///
func testVisitErrorNode() throws {
let lexer = VisitorBasicLexer(ANTLRInputStream(""))
let parser = try VisitorBasicParser(CommonTokenStream(lexer))
class ErrorListener: BaseErrorListener {
override init() {
super.init()
}
var errors = [String]()
override func syntaxError<T : ATNSimulator>(_ recognizer: Recognizer<T>,
_ offendingSymbol: AnyObject?,
_ line: Int, _ charPositionInLine: Int,
_ msg: String, _ e: AnyObject?) {
errors.append("line \(line):\(charPositionInLine) \(msg)")
}
}
parser.removeErrorListeners()
let errorListener = ErrorListener()
parser.addErrorListener(errorListener)
let context = try parser.s()
let errors = errorListener.errors
XCTAssertEqual("(s <missing 'A'> <EOF>)", context.toStringTree(parser))
XCTAssertEqual(1, errors.count)
XCTAssertEqual("line 1:0 missing 'A' at '<EOF>'", errors[0])
class Visitor: VisitorBasicBaseVisitor<String> {
override func visitErrorNode(_ node: ErrorNode) -> String? {
return "Error encountered: \(node.getSymbol()!)"
}
override func defaultResult() -> String? {
return ""
}
override func aggregateResult(_ aggregate: String?, _ nextResult: String?) -> String? {
return aggregate! + nextResult!
}
}
let visitor = Visitor()
let result = visitor.visit(context)
let expected = "Error encountered: [@-1,-1:-1='<missing 'A'>',<1>,1:0]"
XCTAssertEqual(expected, result)
}
///
/// This test verifies that {@link AbstractParseTreeVisitor#visitChildren} does not call
/// {@link ParseTreeVisitor#visit} after {@link AbstractParseTreeVisitor#shouldVisitNextChild} returns
/// {@code false}.
///
func testShouldNotVisitEOF() throws {
let input = "A"
let lexer = VisitorBasicLexer(ANTLRInputStream(input))
let parser = try VisitorBasicParser(CommonTokenStream(lexer))
let context = try parser.s()
XCTAssertEqual("(s A <EOF>)", context.toStringTree(parser))
class Visitor: VisitorBasicBaseVisitor<String> {
override func visitTerminal(_ node: TerminalNode) -> String? {
return "\(node.getSymbol()!)\n"
}
override func shouldVisitNextChild(_ node: RuleNode, _ currentResult: String?) -> Bool {
return currentResult == nil || currentResult!.isEmpty
}
}
let visitor = Visitor()
let result = visitor.visit(context)
let expected = "[@0,0:0='A',<1>,1:0]\n"
XCTAssertEqual(expected, result)
}
///
/// This test verifies that {@link AbstractParseTreeVisitor#shouldVisitNextChild} is called before visiting the first
/// child. It also verifies that {@link AbstractParseTreeVisitor#defaultResult} provides the default return value for
/// visiting a tree.
///
func testShouldNotVisitTerminal() throws {
let input = "A"
let lexer = VisitorBasicLexer(ANTLRInputStream(input))
let parser = try VisitorBasicParser(CommonTokenStream(lexer))
let context = try parser.s()
XCTAssertEqual("(s A <EOF>)", context.toStringTree(parser))
class Visitor: VisitorBasicBaseVisitor<String> {
override func visitTerminal(_ node: TerminalNode) -> String? {
XCTFail()
return nil
}
override func defaultResult() -> String? {
return "default result"
}
override func shouldVisitNextChild(_ node: RuleNode, _ currentResult: String?) -> Bool {
return false
}
}
let visitor = Visitor()
let result = visitor.visit(context)
let expected = "default result"
XCTAssertEqual(expected, result)
}
///
/// This test verifies that the visitor correctly dispatches calls for labeled outer alternatives.
///
func testCalculatorVisitor() throws {
let input = "2 + 8 / 2"
let lexer = VisitorCalcLexer(ANTLRInputStream(input))
let parser = try VisitorCalcParser(CommonTokenStream(lexer))
let context = try parser.s()
XCTAssertEqual("(s (expr (expr 2) + (expr (expr 8) / (expr 2))) <EOF>)", context.toStringTree(parser))
class Visitor: VisitorCalcBaseVisitor<Int> {
override func visitS(_ ctx: VisitorCalcParser.SContext) -> Int? {
return visit(ctx.expr()!)
}
override func visitNumber(_ ctx: VisitorCalcParser.NumberContext) -> Int? {
return Int((ctx.INT()?.getText())!)
}
override func visitMultiply(_ ctx: VisitorCalcParser.MultiplyContext) -> Int? {
let left = visit(ctx.expr(0)!)!
let right = visit(ctx.expr(1)!)!
if ctx.MUL() != nil {
return left * right
}
else {
return left / right
}
}
override func visitAdd(_ ctx: VisitorCalcParser.AddContext) -> Int? {
let left = visit(ctx.expr(0)!)!
let right = visit(ctx.expr(1)!)!
if ctx.ADD() != nil {
return left + right
}
else {
return left - right
}
}
}
let visitor = Visitor()
let result = visitor.visit(context)
let expected = 6
XCTAssertEqual(expected, result!)
}
}

3
runtime/Swift/test.py
View File

@ -56,7 +56,8 @@ def gen_parser(grammar):
return
call([java, '-jar', ANTLR4_JAR,\
'-Dlanguage=Swift', grammar, '-o', grammar_folder + '/gen'])
'-Dlanguage=Swift', grammar, '-visitor',\
'-o', grammar_folder + '/gen'])
def swift_test():