Check type of string in config

1 files changed, 12 insertions, 2 deletions

diff --git a/src/main/java/org/shedlang/compiler/config/toml/TomlTableWithSource.java b/src/main/java/org/shedlang/compiler/config/toml/TomlTableWithSource.java
index e11925f6..3e560d63 100644
--- a/src/main/java/org/shedlang/compiler/config/toml/TomlTableWithSource.java
+++ b/src/main/java/org/shedlang/compiler/config/toml/TomlTableWithSource.java
@@ -107,7 +107,8 @@ public record TomlTableWithSource(
     }
 
     public String getString(String key) {
-        var value = table.getString(key);
+        var value = table.get(key);
+        var valuePosition = table.inputPositionOf(key);
 
         if (value == null) {
             throw new ConfigError(
@@ -116,6 +117,15 @@ public record TomlTableWithSource(
             );
         }
 
-        return value;
+        if (value instanceof String valueString) {
+            return valueString;
+        }
+
+        throw new UnexpectedTypeConfigError(
+            path.plusKey(key),
+            "a string",
+            value.getClass(),
+            TomlSource.sourceAtTomlPosition(fullSource, valuePosition)
+        );
     }
 }