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Interval expressions for match statements

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Ginger Bill
2017-04-21 00:13:20 +01:00
parent a713e33007
commit 9a1566d665
4 changed files with 149 additions and 54 deletions
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src/ir.c
+18 -2
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@@ -6191,8 +6191,24 @@ void ir_build_stmt_internal(irProcedure *proc, AstNode *node) {
for_array(j, cc->list) {
AstNode *expr = cc->list.e[j];
next_cond = ir_new_block(proc, clause, "match.case.next");
irValue *cond = ir_emit_comp(proc, Token_CmpEq, tag, ir_build_expr(proc, expr));
irValue *cond = v_false;
if (expr->kind == AstNode_IntervalExpr) {
ast_node(ie, IntervalExpr, expr);
TokenKind op = {0};
switch (ie->op.kind) {
case Token_Ellipsis: op = Token_LtEq; break;
case Token_HalfClosed: op = Token_Lt; break;
default: GB_PANIC("Invalid interval operator"); break;
}
irValue *lhs = ir_build_expr(proc, ie->left);
irValue *rhs = ir_build_expr(proc, ie->right);
// TODO(bill): do short circuit here
irValue *cond_lhs = ir_emit_comp(proc, Token_LtEq, lhs, tag);
irValue *cond_rhs = ir_emit_comp(proc, op, tag, rhs);
cond = ir_emit_arith(proc, Token_And, cond_lhs, cond_rhs, t_bool);
} else {
cond = ir_emit_comp(proc, Token_CmpEq, tag, ir_build_expr(proc, expr));
}
ir_emit_if(proc, cond, body, next_cond);
ir_start_block(proc, next_cond);
}