diff options
Diffstat (limited to 'ast.c')
| -rw-r--r-- | ast.c | 318 |
1 files changed, 0 insertions, 318 deletions
@@ -1,318 +0,0 @@ -// Some basic operations defined on AST nodes, mainly converting to -// strings for debugging. -#include <gc/cord.h> -#include <printf.h> -#include <stdarg.h> - -#include "ast.h" -#include "stdlib/datatypes.h" -#include "stdlib/integers.h" -#include "stdlib/tables.h" -#include "stdlib/text.h" -#include "cordhelpers.h" - -static const char *OP_NAMES[] = { - [BINOP_UNKNOWN]="unknown", - [BINOP_POWER]="^", [BINOP_MULT]="*", [BINOP_DIVIDE]="/", - [BINOP_MOD]="mod", [BINOP_MOD1]="mod1", [BINOP_PLUS]="+", [BINOP_MINUS]="minus", - [BINOP_CONCAT]="++", [BINOP_LSHIFT]="<<", [BINOP_ULSHIFT]="<<<", - [BINOP_RSHIFT]=">>", [BINOP_URSHIFT]=">>>", [BINOP_MIN]="min", - [BINOP_MAX]="max", [BINOP_EQ]="==", [BINOP_NE]="!=", [BINOP_LT]="<", - [BINOP_LE]="<=", [BINOP_GT]=">", [BINOP_GE]=">=", [BINOP_CMP]="<>", - [BINOP_AND]="and", [BINOP_OR]="or", [BINOP_XOR]="xor", -}; - -const char *binop_method_names[BINOP_XOR+1] = { - [BINOP_POWER]="power", [BINOP_MULT]="times", [BINOP_DIVIDE]="divided_by", - [BINOP_MOD]="modulo", [BINOP_MOD1]="modulo1", [BINOP_PLUS]="plus", [BINOP_MINUS]="minus", - [BINOP_CONCAT]="concatenated_with", [BINOP_LSHIFT]="left_shifted", [BINOP_RSHIFT]="right_shifted", - [BINOP_ULSHIFT]="unsigned_left_shifted", [BINOP_URSHIFT]="unsigned_right_shifted", - [BINOP_AND]="bit_and", [BINOP_OR]="bit_or", [BINOP_XOR]="bit_xor", -}; - -static CORD ast_list_to_xml(ast_list_t *asts); -static CORD arg_list_to_xml(arg_ast_t *args); -static CORD when_clauses_to_xml(when_clause_t *clauses); -static CORD tags_to_xml(tag_ast_t *tags); -static CORD xml_escape(CORD text); -static CORD optional_tagged(const char *tag, ast_t *ast); -static CORD optional_tagged_type(const char *tag, type_ast_t *ast); - -CORD xml_escape(CORD text) -{ - text = CORD_replace(text, "&", "&"); - text = CORD_replace(text, "<", "<"); - text = CORD_replace(text, ">", ">"); - return text; -} - -CORD ast_list_to_xml(ast_list_t *asts) -{ - CORD c = CORD_EMPTY; - for (; asts; asts = asts->next) { - c = CORD_cat(c, ast_to_xml(asts->ast)); - } - return c; -} - -CORD arg_list_to_xml(arg_ast_t *args) { - CORD c = "<args>"; - for (; args; args = args->next) { - CORD arg_cord = args->name ? CORD_all("<arg name=\"", args->name, "\">") : "<arg>"; - if (args->type) - arg_cord = CORD_all(arg_cord, "<type>", type_ast_to_xml(args->type), "</type>"); - if (args->value) - arg_cord = CORD_all(arg_cord, "<value>", ast_to_xml(args->value), "</value>"); - c = CORD_all(c, arg_cord, "</arg>"); - } - return CORD_cat(c, "</args>"); -} - -CORD when_clauses_to_xml(when_clause_t *clauses) { - CORD c = CORD_EMPTY; - for (; clauses; clauses = clauses->next) { - c = CORD_all(c, "<case>", ast_to_xml(clauses->pattern), ast_to_xml(clauses->body), "</case>"); - } - return c; -} - -CORD tags_to_xml(tag_ast_t *tags) { - CORD c = CORD_EMPTY; - for (; tags; tags = tags->next) { - c = CORD_all(c, "<tag name=\"", tags->name, "\">", arg_list_to_xml(tags->fields), "</tag>"); - } - return c; -} - -CORD optional_tagged(const char *tag, ast_t *ast) -{ - return ast ? CORD_all("<", tag, ">", ast_to_xml(ast), "</", tag, ">") : CORD_EMPTY; -} - -CORD optional_tagged_type(const char *tag, type_ast_t *ast) -{ - return ast ? CORD_all("<", tag, ">", type_ast_to_xml(ast), "</", tag, ">") : CORD_EMPTY; -} - -CORD ast_to_xml(ast_t *ast) -{ - if (!ast) return CORD_EMPTY; - - switch (ast->tag) { -#define T(type, ...) case type: { auto data = ast->__data.type; (void)data; return CORD_asprintf(__VA_ARGS__); } - T(Unknown, "<Unknown>") - T(None, "<None>%r</None>", type_ast_to_xml(data.type)) - T(Bool, "<Bool value=\"%s\" />", data.b ? "yes" : "no") - T(Var, "<Var>%s</Var>", data.name) - T(Int, "<Int>%s</Int>", data.str) - T(Num, "<Num>%g</Num>", data.n) - T(TextLiteral, "%r", xml_escape(data.cord)) - T(TextJoin, "<Text%r>%r</Text>", data.lang ? CORD_all(" lang=\"", data.lang, "\"") : CORD_EMPTY, ast_list_to_xml(data.children)) - T(Path, "<Path>%s</Path>", data.path) - T(Declare, "<Declare var=\"%r\">%r</Declare>", ast_to_xml(data.var), ast_to_xml(data.value)) - T(Assign, "<Assign><targets>%r</targets><values>%r</values></Assign>", ast_list_to_xml(data.targets), ast_list_to_xml(data.values)) - T(BinaryOp, "<BinaryOp op=\"%r\">%r %r</BinaryOp>", xml_escape(OP_NAMES[data.op]), ast_to_xml(data.lhs), ast_to_xml(data.rhs)) - T(UpdateAssign, "<UpdateAssign op=\"%r\">%r %r</UpdateAssign>", xml_escape(OP_NAMES[data.op]), ast_to_xml(data.lhs), ast_to_xml(data.rhs)) - T(Negative, "<Negative>%r</Negative>", ast_to_xml(data.value)) - T(Not, "<Not>%r</Not>", ast_to_xml(data.value)) - T(HeapAllocate, "<HeapAllocate>%r</HeapAllocate>", ast_to_xml(data.value)) - T(StackReference, "<StackReference>%r</StackReference>", ast_to_xml(data.value)) - T(Mutexed, "<Mutexed>%r</Mutexed>", ast_to_xml(data.value)) - T(Holding, "<Holding>%r%r</Holding>", ast_to_xml(data.mutexed), ast_to_xml(data.body)) - T(Min, "<Min>%r%r%r</Min>", ast_to_xml(data.lhs), ast_to_xml(data.rhs), optional_tagged("key", data.key)) - T(Max, "<Max>%r%r%r</Max>", ast_to_xml(data.lhs), ast_to_xml(data.rhs), optional_tagged("key", data.key)) - T(Array, "<Array>%r%r</Array>", optional_tagged_type("item-type", data.item_type), ast_list_to_xml(data.items)) - T(Set, "<Set>%r%r</Set>", - optional_tagged_type("item-type", data.item_type), - ast_list_to_xml(data.items)) - T(Table, "<Table>%r%r%r%r</Table>", - optional_tagged_type("key-type", data.key_type), optional_tagged_type("value-type", data.value_type), - optional_tagged("default-value", data.default_value), - ast_list_to_xml(data.entries), optional_tagged("fallback", data.fallback)) - T(TableEntry, "<TableEntry>%r%r</TableEntry>", ast_to_xml(data.key), ast_to_xml(data.value)) - T(Comprehension, "<Comprehension>%r%r%r%r%r</Comprehension>", optional_tagged("expr", data.expr), - ast_list_to_xml(data.vars), optional_tagged("iter", data.iter), - optional_tagged("filter", data.filter)) - T(FunctionDef, "<FunctionDef name=\"%r\">%r%r<body>%r</body></FunctionDef>", ast_to_xml(data.name), - arg_list_to_xml(data.args), optional_tagged_type("return-type", data.ret_type), ast_to_xml(data.body)) - T(ConvertDef, "<ConvertDef>%r%r<body>%r</body></ConvertDef>", - arg_list_to_xml(data.args), optional_tagged_type("return-type", data.ret_type), ast_to_xml(data.body)) - T(Lambda, "<Lambda>%r%r<body>%r</body></Lambda>)", arg_list_to_xml(data.args), - optional_tagged_type("return-type", data.ret_type), ast_to_xml(data.body)) - T(FunctionCall, "<FunctionCall><function>%r</function>%r</FunctionCall>", ast_to_xml(data.fn), arg_list_to_xml(data.args)) - T(MethodCall, "<MethodCall><self>%r</self><method>%s</method>%r</MethodCall>", ast_to_xml(data.self), data.name, arg_list_to_xml(data.args)) - T(Block, "<Block>%r</Block>", ast_list_to_xml(data.statements)) - T(For, "<For>%r%r%r%r%r</For>", ast_list_to_xml(data.vars), optional_tagged("iterable", data.iter), - optional_tagged("body", data.body), optional_tagged("empty", data.empty)) - T(While, "<While>%r%r</While>", optional_tagged("condition", data.condition), optional_tagged("body", data.body)) - T(Repeat, "<Repeat>%r</Repeat>", optional_tagged("body", data.body)) - T(If, "<If>%r%r%r</If>", optional_tagged("condition", data.condition), optional_tagged("body", data.body), optional_tagged("else", data.else_body)) - T(When, "<When><subject>%r</subject>%r%r</When>", ast_to_xml(data.subject), when_clauses_to_xml(data.clauses), optional_tagged("else", data.else_body)) - T(Reduction, "<Reduction op=%r%r>%r</Reduction>", xml_escape(OP_NAMES[data.op]), optional_tagged("key", data.key), - optional_tagged("iterable", data.iter)) - T(Skip, "<Skip>%r</Skip>", data.target) - T(Stop, "<Stop>%r</Stop>", data.target) - T(PrintStatement, "<PrintStatement>%r</PrintStatement>", ast_list_to_xml(data.to_print)) - T(Pass, "<Pass/>") - T(Defer, "<Defer>%r<Defer/>", ast_to_xml(data.body)) - T(Return, "<Return>%r</Return>", ast_to_xml(data.value)) - T(Extern, "<Extern name=\"%s\">%r</Extern>", data.name, type_ast_to_xml(data.type)) - T(StructDef, "<StructDef name=\"%s\">%r<namespace>%r</namespace></StructDef>", data.name, arg_list_to_xml(data.fields), ast_to_xml(data.namespace)) - T(EnumDef, "<EnumDef name=\"%s\"><tags>%r</tags><namespace>%r</namespace></EnumDef>", data.name, tags_to_xml(data.tags), ast_to_xml(data.namespace)) - T(LangDef, "<LangDef name=\"%s\">%r</LangDef>", data.name, ast_to_xml(data.namespace)) - T(Index, "<Index>%r%r</Index>", optional_tagged("indexed", data.indexed), optional_tagged("index", data.index)) - T(FieldAccess, "<FieldAccess field=\"%s\">%r</FieldAccess>", data.field, ast_to_xml(data.fielded)) - T(Optional, "<Optional>%r</Optional>", ast_to_xml(data.value)) - T(NonOptional, "<NonOptional>%r</NonOptional>", ast_to_xml(data.value)) - T(Moment, "<Moment/>") - T(DocTest, "<DocTest>%r<output>%r</output></DocTest>", optional_tagged("expression", data.expr), xml_escape(data.output)) - T(Use, "<Use>%r%r</Use>", optional_tagged("var", data.var), xml_escape(data.path)) - T(InlineCCode, "<InlineCode>%r</InlineCode>", xml_escape(data.code)) - T(Deserialize, "<Deserialize><type>%r</type>%r</Deserialize>", type_ast_to_xml(data.type), ast_to_xml(data.value)) - default: return "???"; -#undef T - } -} - -CORD type_ast_to_xml(type_ast_t *t) -{ - if (!t) return "NULL"; - - switch (t->tag) { -#define T(type, ...) case type: { auto data = t->__data.type; (void)data; return CORD_asprintf(__VA_ARGS__); } - T(UnknownTypeAST, "<UnknownType/>") - T(VarTypeAST, "%s", data.name) - T(PointerTypeAST, "<PointerType is_stack=\"%s\">%r</PointerType>", - data.is_stack ? "yes" : "no", type_ast_to_xml(data.pointed)) - T(ArrayTypeAST, "<ArrayType>%r</ArrayType>", type_ast_to_xml(data.item)) - T(SetTypeAST, "<TableType>%r</TableType>", type_ast_to_xml(data.item)) - T(TableTypeAST, "<TableType>%r %r</TableType>", type_ast_to_xml(data.key), type_ast_to_xml(data.value)) - T(FunctionTypeAST, "<FunctionType>%r %r</FunctionType>", arg_list_to_xml(data.args), type_ast_to_xml(data.ret)) - T(OptionalTypeAST, "<OptionalType>%r</OptionalType>", data.type) - T(MutexedTypeAST, "<MutexedType>%r</MutexedType>", data.type) -#undef T - default: return CORD_EMPTY; - } -} - -int printf_ast(FILE *stream, const struct printf_info *info, const void *const args[]) -{ - ast_t *ast = *(ast_t**)(args[0]); - if (ast) { - if (info->alt) - return fprintf(stream, "%.*s", (int)(ast->end - ast->start), ast->start); - else - return CORD_put(ast_to_xml(ast), stream); - } else { - return fputs("(null)", stream); - } -} - -PUREFUNC bool is_idempotent(ast_t *ast) -{ - switch (ast->tag) { - case Int: case Bool: case Num: case Var: case None: case TextLiteral: return true; - case Index: { - auto index = Match(ast, Index); - return is_idempotent(index->indexed) && index->index != NULL && is_idempotent(index->index); - } - case FieldAccess: { - auto access = Match(ast, FieldAccess); - return is_idempotent(access->fielded); - } - default: return false; - } -} - -void _visit_topologically(ast_t *ast, Table_t definitions, Table_t *visited, Closure_t fn) -{ - void (*visit)(void*, ast_t*) = (void*)fn.fn; - if (ast->tag == StructDef) { - auto def = Match(ast, StructDef); - if (Table$str_get(*visited, def->name)) - return; - - Table$str_set(visited, def->name, (void*)_visit_topologically); - for (arg_ast_t *field = def->fields; field; field = field->next) { - if (field->type && field->type->tag == VarTypeAST) { - const char *field_type_name = Match(field->type, VarTypeAST)->name; - ast_t *dependency = Table$str_get(definitions, field_type_name); - if (dependency) { - _visit_topologically(dependency, definitions, visited, fn); - } - } - - } - visit(fn.userdata, ast); - } else if (ast->tag == EnumDef) { - auto def = Match(ast, EnumDef); - if (Table$str_get(*visited, def->name)) - return; - - Table$str_set(visited, def->name, (void*)_visit_topologically); - for (tag_ast_t *tag = def->tags; tag; tag = tag->next) { - for (arg_ast_t *field = tag->fields; field; field = field->next) { - if (field->type && field->type->tag == VarTypeAST) { - const char *field_type_name = Match(field->type, VarTypeAST)->name; - ast_t *dependency = Table$str_get(definitions, field_type_name); - if (dependency) { - _visit_topologically(dependency, definitions, visited, fn); - } - } - } - } - visit(fn.userdata, ast); - } else if (ast->tag == LangDef) { - auto def = Match(ast, LangDef); - if (Table$str_get(*visited, def->name)) - return; - visit(fn.userdata, ast); - } else { - visit(fn.userdata, ast); - } -} - -void visit_topologically(ast_list_t *asts, Closure_t fn) -{ - // Visit each top-level statement in topological order: - // - 'use' statements first - // - then typedefs - // - visiting typedefs' dependencies first - // - then function/variable declarations - - Table_t definitions = {}; - for (ast_list_t *stmt = asts; stmt; stmt = stmt->next) { - if (stmt->ast->tag == StructDef) { - auto def = Match(stmt->ast, StructDef); - Table$str_set(&definitions, def->name, stmt->ast); - } else if (stmt->ast->tag == EnumDef) { - auto def = Match(stmt->ast, EnumDef); - Table$str_set(&definitions, def->name, stmt->ast); - } else if (stmt->ast->tag == LangDef) { - auto def = Match(stmt->ast, LangDef); - Table$str_set(&definitions, def->name, stmt->ast); - } - } - - void (*visit)(void*, ast_t*) = (void*)fn.fn; - Table_t visited = {}; - // First: 'use' statements in order: - for (ast_list_t *stmt = asts; stmt; stmt = stmt->next) { - if (stmt->ast->tag == Use || (stmt->ast->tag == Declare && Match(stmt->ast, Declare)->value->tag == Use)) - visit(fn.userdata, stmt->ast); - } - // Then typedefs in topological order: - for (ast_list_t *stmt = asts; stmt; stmt = stmt->next) { - if (stmt->ast->tag == StructDef || stmt->ast->tag == EnumDef || stmt->ast->tag == LangDef) - _visit_topologically(stmt->ast, definitions, &visited, fn); - } - // Then everything else in order: - for (ast_list_t *stmt = asts; stmt; stmt = stmt->next) { - if (!(stmt->ast->tag == StructDef || stmt->ast->tag == EnumDef || stmt->ast->tag == LangDef - || stmt->ast->tag == Use || (stmt->ast->tag == Declare && Match(stmt->ast, Declare)->value->tag == Use))) { - visit(fn.userdata, stmt->ast); - } - } -} - -// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0 |