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Friendly error message for "λx.x in x"

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This commit is contained in:
Arne Keller 2021-07-19 11:24:57 +02:00
parent 35013bd819
commit ed7ce73679
3 changed files with 20 additions and 6 deletions
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2
src/main/java/edu/kit/typicalc/model/parser/LambdaParser.java
View File

@ -92,7 +92,7 @@ public class LambdaParser {
}
return new Result<>(null,
ParseError.unexpectedToken(last, ParseError.ErrorType.TERM_ERROR)
.expectedTypes(ATOM_START_TOKENS));
.expectedInput(ExpectedInput.TERM));
}
/**

4
src/main/java/edu/kit/typicalc/view/content/typeinferencecontent/latexcreator/LatexCreator.java
View File

@ -126,8 +126,8 @@ public class LatexCreator implements StepVisitor {
public void visit(AbsStepWithLet absL) {
tree.insert(0, generateConclusion(absL,
mode == LatexCreatorMode.MATHJAX
? "\\LeftLabel{\\class{typicalc-label typicalc-label-abs-let typicalc-step-" + absL.getStepIndex()
+ "}{\\textrm A{\\small BS}}}" : LABEL_ABS,
? "\\LeftLabel{\\class{typicalc-label typicalc-label-abs-let typicalc-step-"
+ absL.getStepIndex() + "}{\\textrm A{\\small BS}}}" : LABEL_ABS,
UIC));
absL.getPremise().accept(this);
}

14
src/test/java/edu/kit/typicalc/model/parser/LambdaParserTest.java
View File

@ -21,6 +21,7 @@ class LambdaParserTest {
term = parser.parse();
assertEquals(new AppTerm(new VarTerm("b1"), new VarTerm("a1")), term.unwrap());
}
@Test
void absTerm() {
LambdaParser parser = new LambdaParser("λx.x");
@ -28,6 +29,7 @@ class LambdaParserTest {
assertEquals(new AbsTerm(new VarTerm("x"), new VarTerm("x")), term);
assertEquals("λx.x", term.toString());
}
@Test
void appTerm() {
LambdaParser parser = new LambdaParser("(λx.x)(λx.x)");
@ -39,6 +41,7 @@ class LambdaParserTest {
);
assertEquals("(λx.x)(λx.x)", term.toString());
}
@Test
void letTerm() {
LambdaParser parser = new LambdaParser("let id = λx.x in id 1");
@ -57,6 +60,7 @@ class LambdaParserTest {
parser.parse().unwrap()
);
}
@Test
void complicatedTerm() {
LambdaParser parser = new LambdaParser("(λx.λy.x y 5)(λz.z)(true)");
@ -246,6 +250,16 @@ class LambdaParserTest {
assertNotEquals(err2, err3);
}
@Test
void errorCase4() {
ParseError err = getParseError("λx.x in x");
assertEquals(ParseError
.unexpectedToken(
new Token(TokenType.IN, "in", "λx.x in x", 5),
ParseError.ErrorType.TERM_ERROR)
.expectedInput(ExpectedInput.TERM), err);
}
@Test
void equality() {
EqualsVerifier.forClass(Token.class).usingGetClass().verify();