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HM type inference #24

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Merged
jpksh90 merged 1 commit into from
Feb 10, 2026
Merged

HM type inference #24

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16 changes: 16 additions & 0 deletions src/main/kotlin/Main.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -17,12 +17,14 @@ import slang.parser.File2ParseTreeTransformer
import slang.repl.Repl
import slang.runtime.ConcreteState
import slang.runtime.Interpreter
import slang.typeinfer.typeCheck
import java.io.File
import java.nio.file.Paths

class SlangCLI : CliktCommand(name = "slang") {
private val filename by argument(help = "Slang source file to execute").optional()
private val hlir by option("--hlir", help = "Output HLIR representation instead of running").flag()
private val typecheckOnly by option("--typecheck", help = "Run Hindley-Milner type inference and report errors").flag()
private val output by option("-o", help = "Output file for HLIR (default: stdout)")

init {
Expand Down Expand Up @@ -54,6 +56,8 @@ class SlangCLI : CliktCommand(name = "slang") {
onSuccess = { programUnit ->
if (hlir) {
outputHlir(programUnit)
} else if (typecheckOnly) {
runTypeCheck(programUnit)
} else {
runProgram(programUnit)
}
Expand Down Expand Up @@ -84,6 +88,18 @@ class SlangCLI : CliktCommand(name = "slang") {
}
}

private fun runTypeCheck(programUnit: ProgramUnit) {
val errors = typeCheck(programUnit)
if (errors.isEmpty()) {
echo("Type checking passed. No errors found.")
} else {
echo("Type checking failed:", err = true)
for (e in errors) {
echo(" ${e.location} ${e.message}", err = true)
}
}
}
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private fun runProgram(programUnit: ProgramUnit) {
try {
val interpreter = Interpreter()
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