Make errors more like dyalog:

* Use the same error numbers
* Rename ⎕THROW to ⎕SIGNAL
* Implement ⎕EN to inspect the last error code
* Implement ⎕EM to get a message from an error code

1 files changed, 16 insertions, 13 deletions

diff --git a/error.c b/error.c
index 2a59553..09f2c32 100644
--- a/error.c
+++ b/error.c
@@ -7,19 +7,6 @@
 
 ErrorGuard *globalerrorguard;
 
-Rune *errorstrs[] = {
-	[ESyntax] = L"SYNTAX ERROR",
-	[EParse] = L"PARSE ERROR",
-	[EValue] = L"VALUE ERROR",
-	[EDomain] = L"DOMAIN ERROR",
-	[ERank] = L"RANK ERROR",
-	[EType] = L"TYPE ERROR",
-	[ELength] = L"LENGTH ERROR",
-	[EIndex] = L"INDEX ERROR",
-	[EShape] = L"SHAPE ERROR",
-	[ENotImplemented] = L"NOT IMPLEMENTED",
-};
-
 ErrorGuard *
 newerrorguard(Array *codes, Statement *guard)
 {
@@ -69,3 +56,19 @@ match:
 	longjmp(matching->jmp, 1);
 }
 
+Rune *
+errorstr(int code)
+{
+	Rune *err;
+	switch(code){
+	case ESyntax: err = L"SYNTAX ERROR"; break;
+	case EIndex: err = L"INDEX ERROR"; break;
+	case ERank: err = L"RANK ERROR"; break;
+	case ELength: err = L"LENGTH ERROR"; break;
+	case EValue: err = L"VALUE ERROR"; break;
+	case EDomain: err = L"DOMAIN ERROR"; break;
+	case ENotImplemented: err = L"NOT IMPLEMENTED"; break;
+	default: err = L""; break;
+	}
+	return err;
+}
\ No newline at end of file