Apple-2-SW/prog8
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stop compiler at lexer errors as well

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This commit is contained in:
Irmen de Jong 2019-01-01 19:36:27 +01:00
parent d2616b6a08
commit 21136e8cad
1 changed files with 13 additions and 3 deletions
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16
compiler/src/prog8/parser/ModuleParsing.kt
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@ -1,10 +1,11 @@
package prog8.parser
import org.antlr.v4.runtime.CharStreams
import org.antlr.v4.runtime.*
import prog8.ast.*
import java.nio.file.Files
import java.nio.file.Path
import java.nio.file.Paths
import java.util.*
class ParsingFailedError(override var message: String) : Exception(message)
@ -13,6 +14,12 @@ class ParsingFailedError(override var message: String) : Exception(message)
private val importedModules : HashMap<String, Module> = hashMapOf()
private class LexerErrorListener: BaseErrorListener() {
var numberOfErrors: Int = 0
override fun syntaxError(p0: Recognizer<*, *>?, p1: Any?, p2: Int, p3: Int, p4: String?, p5: RecognitionException?) {
numberOfErrors++
}
}
fun importModule(filePath: Path) : Module {
print("importing '${filePath.fileName}'")
@ -26,11 +33,14 @@ fun importModule(filePath: Path) : Module {
val moduleName = filePath.fileName.toString().substringBeforeLast('.')
val input = CharStreams.fromPath(filePath)
val lexer = prog8Lexer(input)
val lexerErrors = LexerErrorListener()
lexer.addErrorListener(lexerErrors)
val tokens = CommentHandlingTokenStream(lexer)
val parser = prog8Parser(tokens)
val parseTree = parser.module()
if(parser.numberOfSyntaxErrors > 0)
throw ParsingFailedError("There are ${parser.numberOfSyntaxErrors} syntax errors in '${filePath.fileName}'.")
val numberOfErrors = parser.numberOfSyntaxErrors + lexerErrors.numberOfErrors
if(numberOfErrors > 0)
throw ParsingFailedError("There are $numberOfErrors errors in '${filePath.fileName}'.")
// You can do something with the parsed comments:
// tokens.commentTokens().forEach { println(it) }