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Change interval syntax: .. open range, ..< half-closed range

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Ginger Bill
2017-04-20 23:22:45 +01:00
parent c5411a25a9
commit a713e33007
15 changed files with 98 additions and 59 deletions
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src/check_expr.c
+16
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@@ -2819,6 +2819,7 @@ bool check_index_value(Checker *c, AstNode *index_value, i64 max_count, i64 *val
return false;
}
return true;
}
}
@@ -5732,6 +5733,11 @@ ExprKind check_expr_base_internal(Checker *c, Operand *o, AstNode *node, Type *t
o->mode = Addressing_Value;
}
if (se->low == NULL && se->high != NULL) {
error(se->interval0, "1st index is required if a 2nd index is specified");
// It is okay to continue as it will assume the 1st index is zero
}
if (se->index3 && (se->high == NULL || se->max == NULL)) {
error(se->close, "2nd and 3rd indices are required in a 3-index slice");
o->mode = Addressing_Invalid;
@@ -5739,6 +5745,16 @@ ExprKind check_expr_base_internal(Checker *c, Operand *o, AstNode *node, Type *t
return kind;
}
if (se->index3 && se->interval0.kind != se->interval1.kind) {
error(se->close, "The interval separators for in a 3-index slice must be the same");
o->mode = Addressing_Invalid;
o->expr = node;
return kind;
}
TokenKind interval_kind = se->interval0.kind;
i64 indices[2] = {0};
AstNode *nodes[3] = {se->low, se->high, se->max};
for (isize i = 0; i < gb_count_of(nodes); i++) {