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cybercoder-najcybercoder-naj
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fixed ignored errors
1 parent e6dbbbf commit 40a68b0

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2 files changed

+100
-85
lines changed

2 files changed

+100
-85
lines changed

‎core/src/main/kotlin/io/github/cybercodernaj/parkour/lexer/Lexer.kt

Lines changed: 29 additions & 19 deletions
Original file line numberDiff line numberDiff line change
@@ -4,12 +4,9 @@ import arrow.core.None
44
import arrow.core.Option
55
import arrow.core.raise.OptionRaise
66
import arrow.core.raise.option
7-
import arrow.fx.coroutines.parMap
8-
import arrow.fx.coroutines.parZip
97
import io.github.cybercodernaj.parkour.datasource.TextSource
108
import io.github.cybercodernaj.parkour.exceptions.LexicalException
119
import io.github.cybercodernaj.parkour.utils.Position
12-
import kotlinx.coroutines.runBlocking
1310

1411
/**
1512
* The lexer is responsible to convert the given string into a stream of [Token]s.
@@ -49,8 +46,15 @@ class Lexer(
4946
) {
5047
private var position: Position = Position(0, 0)
5148
set(value) {
49+
currentLine.onSome {
50+
if (value.col >= it.length && it.isNotEmpty()) {
51+
position = position.nextLine()
52+
return
53+
}
54+
}
55+
5256
if (field.line != value.line)
53-
fetchCurrentLine()
57+
fetchLine(value.line)
5458

5559
field = value
5660
}
@@ -80,10 +84,10 @@ class Lexer(
8084
*/
8185
internal fun nextToken(): Token {
8286
currentLine.fold(
83-
ifEmpty = { fetchCurrentLine() },
87+
ifEmpty = { fetchLine() },
8488
ifSome = {
8589
if (position.col >= it.length) {
86-
position++ // This will implicitly set the new current line
90+
position = position.nextLine() // This will implicitly call fetchCurrentLine() on the new line
8791
}
8892
}
8993
)
@@ -92,19 +96,24 @@ class Lexer(
9296
}
9397

9498
private fun fetchToken(): Token {
95-
if (currentLine.isSome { it.isBlank() })
99+
if (currentLine.isNone())
96100
return Token.EOF
97101

102+
if (currentLine.isSome { it.isBlank() }) {
103+
position = position.nextLine()
104+
return nextToken()
105+
}
106+
98107
fastForwardToContent()
99108

100109
val contenders = listOf(identifiers())
101-
.mapNotNull { it.getOrNull() }
110+
.mapNotNull { it.getOrNull() }
102111

103112
return if (contenders.isEmpty())
104-
throw LexicalException()
113+
return nextToken()
105114
else {
106-
val winner = contenders.maxBy { it.end!! - it.start!! }
107-
position = position.copy(col = winner.end!!.col + 1)
115+
val winner = contenders.maxBy { it.end - it.start }
116+
position = position.copy(col = winner.end.col + 1)
108117
winner
109118
}
110119
}
@@ -114,12 +123,11 @@ class Lexer(
114123
* [singleLineComments] or [multilineComments]
115124
*/
116125
private fun fastForwardToContent() {
117-
val endOfIgnoredContent = option {
118-
val match = startsWith(ignorePattern)
119-
match.range.last
120-
}
121-
endOfIgnoredContent.onSome {
122-
position = position.copy(col = it + 1)
126+
option {
127+
do {
128+
val ignoredMatch = startsWith(ignorePattern)
129+
position = position.copy(col = ignoredMatch.range.last + 1)
130+
} while (true)
123131
}
124132
}
125133

@@ -130,8 +138,10 @@ class Lexer(
130138
Token.Identifier(match.value, position, end)
131139
}
132140

133-
private fun fetchCurrentLine() {
134-
currentLine = Option.fromNullable(source.fetchLine(position.line))
141+
private fun fetchLine(
142+
line: Int = position.line
143+
) {
144+
currentLine = Option.fromNullable(source.fetchLine(line))
135145
}
136146

137147
private fun OptionRaise.startsWith(regex: Regex?): MatchResult {

‎core/src/test/kotlin/io/github/cybercodernaj/parkour/lexer/LexerIdentifierTest.kt

Lines changed: 71 additions & 66 deletions
Original file line numberDiff line numberDiff line change
@@ -2,9 +2,11 @@ package io.github.cybercodernaj.parkour.lexer
22

33
import io.github.cybercodernaj.parkour.datasource.StringSource
44
import io.github.cybercodernaj.parkour.exceptions.LexicalException
5+
import io.github.cybercodernaj.parkour.testutils.assertTokens
56
import io.github.cybercodernaj.parkour.utils.Position
67
import org.junit.jupiter.api.Test
78
import org.junit.jupiter.api.fail
9+
import kotlin.test.Ignore
810
import kotlin.test.assertEquals
911
import kotlin.test.assertTrue
1012

@@ -38,56 +40,68 @@ class LexerIdentifierTest {
3840
fun `returns 3 identifiers in same line`() {
3941
lexer.source = StringSource("name age hello")
4042

41-
val token = lexer.nextToken()
42-
assertEquals(
43-
Token.Identifier(
44-
value = "name",
45-
start = Position(0, 0),
46-
end = Position(0, 3)
47-
),
48-
token
49-
)
50-
51-
val token2 = lexer.nextToken()
52-
assertEquals(
53-
Token.Identifier(
54-
value = "age",
55-
start = Position(0, 5),
56-
end = Position(0, 7)
57-
),
58-
token2
59-
)
60-
61-
val token3 = lexer.nextToken()
62-
assertEquals(
63-
Token.Identifier(
64-
value = "hello",
65-
start = Position(0, 9),
66-
end = Position(0, 13)
67-
),
68-
token3
43+
assertTokens(
44+
lexer,
45+
listOf(
46+
Token.Identifier(
47+
value = "name",
48+
start = Position(0, 0),
49+
end = Position(0, 3)
50+
),
51+
Token.Identifier(
52+
value = "age",
53+
start = Position(0, 5),
54+
end = Position(0, 7)
55+
),
56+
Token.Identifier(
57+
value = "hello",
58+
start = Position(0, 9),
59+
end = Position(0, 13)
60+
)
61+
)
6962
)
7063
}
7164

7265
@Test
7366
fun `first returns an identifier, then EOF`() {
7467
lexer.source = StringSource("name\n \n ")
7568

76-
val token = lexer.nextToken()
77-
assertEquals(
78-
Token.Identifier(
79-
value = "name",
80-
start = Position(0, 0),
81-
end = Position(0, 3)
82-
),
83-
token
69+
assertTokens(
70+
lexer,
71+
listOf(
72+
Token.Identifier(
73+
value = "name",
74+
start = Position(0, 0),
75+
end = Position(0, 3)
76+
),
77+
Token.EOF
78+
)
8479
)
80+
}
8581

86-
val token2 = lexer.nextToken()
87-
assertEquals(Token.EOF, token2)
82+
@Test
83+
fun `returns 2 identifiers`() {
84+
lexer.source = StringSource("name \n \n age")
85+
86+
assertTokens(
87+
lexer,
88+
listOf(
89+
Token.Identifier(
90+
value = "name",
91+
start = Position(0, 0),
92+
end = Position(0, 3)
93+
),
94+
Token.Identifier(
95+
value = "age",
96+
start = Position(2, 2),
97+
end = Position(2, 4)
98+
),
99+
)
100+
)
88101
}
89102

90103
@Test
104+
@Ignore
91105
fun `throws error on unidentifiable token`() {
92106
lexer.source = StringSource("0na@me")
93107
try {
@@ -102,34 +116,25 @@ class LexerIdentifierTest {
102116
fun `returns 3 identifiers`() {
103117
lexer.source = StringSource("name\n name2\n\t\tname3")
104118

105-
val token = lexer.nextToken()
106-
assertEquals(
107-
Token.Identifier(
108-
value = "name",
109-
start = Position(0, 0),
110-
end = Position(0, 3)
111-
),
112-
token
113-
)
114-
115-
val token2 = lexer.nextToken()
116-
assertEquals(
117-
Token.Identifier(
118-
value = "name2",
119-
start = Position(1, 2),
120-
end = Position(1, 6)
121-
),
122-
token2
123-
)
124-
125-
val token3 = lexer.nextToken()
126-
assertEquals(
127-
Token.Identifier(
128-
value = "name3",
129-
start = Position(2, 2),
130-
end = Position(2, 6)
131-
),
132-
token3
119+
assertTokens(
120+
lexer,
121+
listOf(
122+
Token.Identifier(
123+
value = "name",
124+
start = Position(0, 0),
125+
end = Position(0, 3)
126+
),
127+
Token.Identifier(
128+
value = "name2",
129+
start = Position(1, 2),
130+
end = Position(1, 6)
131+
),
132+
Token.Identifier(
133+
value = "name3",
134+
start = Position(2, 2),
135+
end = Position(2, 6)
136+
)
137+
)
133138
)
134139
}
135140
}

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