diff options
Diffstat (limited to 'frontend')
| -rw-r--r-- | frontend/transform.icl | 86 |
1 files changed, 65 insertions, 21 deletions
diff --git a/frontend/transform.icl b/frontend/transform.icl index 768c5e6..51e45bf 100644 --- a/frontend/transform.icl +++ b/frontend/transform.icl @@ -903,6 +903,25 @@ cContainsNoFreeVars :== False cMacroIsCalled :== True cNoMacroIsCalled :== False +class GetSetPatternRhs a +where + get_pattern_rhs :: !a -> Expression + set_pattern_rhs :: !a !Expression -> a + +instance GetSetPatternRhs AlgebraicPattern + where + get_pattern_rhs p = p.ap_expr + set_pattern_rhs p expr = {p & ap_expr=expr} + +instance GetSetPatternRhs BasicPattern + where + get_pattern_rhs p = p.bp_expr + set_pattern_rhs p expr = {p & bp_expr=expr}; + +instance GetSetPatternRhs DynamicPattern + where + get_pattern_rhs p = p.dp_rhs + set_pattern_rhs p expr = {p & dp_rhs=expr} mergeCases :: !(!Expression, !Position) ![(!Expression, !Position)] !*VarHeap !*ExpressionHeap !*ErrorAdmin -> *(!(!Expression, !Position), !*VarHeap, !*ExpressionHeap, !*ErrorAdmin) @@ -934,33 +953,30 @@ where # (split_result, var_heap, symbol_heap) = split_case split_var_info_ptr alg_pattern.ap_expr var_heap symbol_heap -> case split_result of Yes split_case - -> (Yes { split_case & case_guards = push_expression_into_guards ( - \guard_expr -> Case { this_case & case_guards = - AlgebraicPatterns type [ { alg_pattern & ap_expr = guard_expr }] }) - split_case.case_guards }, var_heap, symbol_heap) - + # (cees,symbol_heap) = push_expression_into_guards_and_default + ( \ guard_expr -> { this_case & case_guards = AlgebraicPatterns type [{ alg_pattern & ap_expr = guard_expr }] } ) + split_case symbol_heap + -> (Yes cees, var_heap, symbol_heap) No -> (No, var_heap, symbol_heap) BasicPatterns type [basic_pattern] # (split_result, var_heap, symbol_heap) = split_case split_var_info_ptr basic_pattern.bp_expr var_heap symbol_heap -> case split_result of Yes split_case - -> (Yes { split_case & case_guards = push_expression_into_guards ( - \guard_expr -> Case { this_case & case_guards = - BasicPatterns type [ { basic_pattern & bp_expr = guard_expr }] }) - split_case.case_guards }, var_heap, symbol_heap) - + # (cees,symbol_heap) = push_expression_into_guards_and_default + ( \ guard_expr -> { this_case & case_guards = BasicPatterns type [ { basic_pattern & bp_expr = guard_expr }] }) + split_case symbol_heap + -> (Yes cees, var_heap, symbol_heap) No -> (No, var_heap, symbol_heap) DynamicPatterns [dynamic_pattern] # (split_result, var_heap, symbol_heap) = split_case split_var_info_ptr dynamic_pattern.dp_rhs var_heap symbol_heap -> case split_result of Yes split_case - -> (Yes { split_case & case_guards = push_expression_into_guards ( - \guard_expr -> Case { this_case & case_guards = - DynamicPatterns [ { dynamic_pattern & dp_rhs = guard_expr }] }) - split_case.case_guards }, var_heap, symbol_heap) - + # (cees,symbol_heap) = push_expression_into_guards_and_default + ( \ guard_expr -> { this_case & case_guards = DynamicPatterns [ { dynamic_pattern & dp_rhs = guard_expr }] }) + split_case symbol_heap + -> (Yes cees, var_heap, symbol_heap) No -> (No, var_heap, symbol_heap) _ @@ -996,12 +1012,40 @@ where set_alias _ var_heap = var_heap - push_expression_into_guards expr_fun (AlgebraicPatterns type patterns) - = AlgebraicPatterns type (map (\algpattern -> { algpattern & ap_expr = expr_fun algpattern.ap_expr }) patterns) - push_expression_into_guards expr_fun (BasicPatterns type patterns) - = BasicPatterns type (map (\baspattern -> { baspattern & bp_expr = expr_fun baspattern.bp_expr }) patterns) - push_expression_into_guards expr_fun (DynamicPatterns patterns) - = DynamicPatterns (map (\dynpattern -> { dynpattern & dp_rhs = expr_fun dynpattern.dp_rhs }) patterns) + push_expression_into_guards_and_default expr_fun split_case symbol_heap + = push_expression_into_guards_and_default split_case symbol_heap + where + push_expression_into_guards_and_default split_case=:{case_default=No} symbol_heap + = push_expression_into_guards split_case symbol_heap + push_expression_into_guards_and_default split_case=:{case_default=Yes default_expr} symbol_heap + # (new_default_expr,symbol_heap) = new_case default_expr symbol_heap + = push_expression_into_guards {split_case & case_default=Yes new_default_expr} symbol_heap + + push_expression_into_guards split_case=:{case_guards=AlgebraicPatterns type patterns} symbol_heap + # (new_patterns,symbol_heap) = push_expression_into_patterns patterns symbol_heap + = ({split_case & case_guards=AlgebraicPatterns type new_patterns},symbol_heap) + push_expression_into_guards split_case=:{case_guards=BasicPatterns type patterns} symbol_heap + # (new_patterns,symbol_heap) = push_expression_into_patterns patterns symbol_heap + = ({split_case & case_guards=BasicPatterns type new_patterns},symbol_heap) + push_expression_into_guards split_case=:{case_guards=DynamicPatterns patterns} symbol_heap + # (new_patterns,symbol_heap) = push_expression_into_patterns patterns symbol_heap + = ({split_case & case_guards=DynamicPatterns new_patterns},symbol_heap) + + push_expression_into_patterns [] symbol_heap + = ([],symbol_heap) + push_expression_into_patterns [pattern:patterns] symbol_heap + # (patterns,symbol_heap) = mapSt f patterns symbol_heap + with + f algpattern symbol_heap + # (case_expr,symbol_heap) = new_case (get_pattern_rhs algpattern) symbol_heap + = (set_pattern_rhs algpattern case_expr,symbol_heap) + = ([set_pattern_rhs pattern (Case (expr_fun (get_pattern_rhs pattern))):patterns],symbol_heap) + + new_case expr symbol_heap + # cees=expr_fun expr + # (case_info,symbol_heap) = readPtr cees.case_info_ptr symbol_heap + # (new_case_info_ptr,symbol_heap) = newPtr case_info symbol_heap + = (Case {cees & case_info_ptr=new_case_info_ptr},symbol_heap) replace_variables_in_expression expr var_heap symbol_heap # us = { us_var_heap = var_heap, us_symbol_heap = symbol_heap, us_opt_type_heaps = No,us_cleanup_info = []} |