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add error for accessing empty array

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closes #134
This commit is contained in:
Andrew Kelley 2016-04-10 13:18:42 -07:00
parent 0683bd8bf6
commit b117b5907c
2 changed files with 10 additions and 0 deletions
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3
src/analyze.cpp
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@ -2445,6 +2445,9 @@ static TypeTableEntry *analyze_array_access_expr(CodeGen *g, ImportTableEntry *i
if (array_type->id == TypeTableEntryIdInvalid) {
return_type = g->builtin_types.entry_invalid;
} else if (array_type->id == TypeTableEntryIdArray) {
if (array_type->data.array.len == 0) {
add_node_error(g, node, buf_sprintf("out of bounds array access"));
}
return_type = array_type->data.array.child_type;
} else if (array_type->id == TypeTableEntryIdPointer) {
return_type = array_type->data.pointer.child_type;

7
test/run_tests.cpp
View File

@ -1814,6 +1814,13 @@ fn derp(){}
add_compile_fail_case("assign null to non-nullable pointer", R"SOURCE(
const a: &u8 = null;
)SOURCE", 1, ".tmp_source.zig:2:16: error: expected maybe type, got '&u8'");
add_compile_fail_case("indexing an array of size zero", R"SOURCE(
const array = []u8{};
fn foo() {
const pointer = &array[0];
}
)SOURCE", 1, ".tmp_source.zig:4:27: error: out of bounds array access");
}
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