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desugar.flow
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desugar.flow
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import tools/common/pathutil;
import tools/flowc/fcmodule;
import tools/flowc/flow_ast;
import lingo/compiler/syntaxtree_util;
import text/deserialize_string;
import tools/flowc/type_helpers;
import tools/flowc/flow_ast_mnemonics;
import tools/flowc/flowc_println;
import tools/flowc/typechecker/initorder;
export {
// Extract the imports of a file
extractFcImports(fileinfo : FcFileInfo, st : SyntaxTree) -> [FcImport];
// Extract the forbids of a file
extractFcForbids(fileinfo : FcFileInfo, st : SyntaxTree) -> [FcForbid];
// Desugar a file, once we know all dependencies are registered in the global names
desugarFcModule(acc : FlowcAcc, local : FcTypeEnvLocal, fileinfo : FcFileInfo, st : SyntaxTree) -> FcModule;
}
extractFcImports(fileinfo : FcFileInfo, st : SyntaxTree) -> [FcImport] {
grab = \t -> grabSTText(t, fileinfo.content);
importExport : [SyntaxTree] = get_flow_importExport_s(st);
fold(importExport, [], \acc, ts : SyntaxTree -> {
if (ts.rule == st_import) {
arrayPush(acc, FcImport(grab(get_flow_path(ts)), false, ts.start, ts.end));
} else if (ts.rule == st_dynamicImport) {
arrayPush(acc, FcImport(grab(get_flow_path(ts)), true, ts.start, ts.end));
} else {
// forbid & export
acc;
}
});
}
extractFcForbids(fileinfo : FcFileInfo, st : SyntaxTree) -> [FcForbid] {
grab = \t -> grabSTText(t, fileinfo.content);
importExport : [SyntaxTree] = get_flow_importExport_s(st);
fold(importExport, [], \acc, ts : SyntaxTree -> {
if (ts.rule == st_forbid) {
arrayPush(acc, FcForbid(grab(get_flow_path(ts)), ts.start, ts.end));
} else {
// import & export
acc;
}
});
}
DesugarAcc(
fileinfo : FcFileInfo,
names : FcGlobalNames,
fileStructs : Tree<string, FcTypeStruct>,
fileUnions : Tree<string, FcTypeUnion>,
// Should we instantiate type names we see?
instantiateTypenames : bool,
env : FcTypeEnv,
tyvarIdGroup : IdGroup,
errors : ref [FcError],
stringIncludes : ref [string],
);
desugarFcModule(facc : FlowcAcc, local : FcTypeEnvLocal, fileinfo : FcFileInfo, st : SyntaxTree) -> FcModule {
if (fileinfo.flowfile == "n") fcPrintln("HIA: st = " + toString(st));
config = facc.config;
if (config.verbose >= 2) {
fcPrintln("Desugaring '" + fileinfo.flowfile + "'");
}
// flow = '\ufeff'? ws (~importExport)*:e (~toplevelDeclaration)*:d lastLineComment? {FaProgram(:e, :d, zero())};
// Yep, ugly
errors : ref [FcError] = ref [];
// TODO: Traverse the fc modules for syntax errors in the STs.
if (st.end != strlen(fileinfo.content)) {
// TODO: This is not very precise. We could inspect the caches in the grammar to find out where the last parsed bit is.
refArrayPush(errors, FcError("Syntax error: Did not parse all of file", [FcPosition(fileinfo.flowfile, st.end, st.end)]));
}
grab = \t -> grabSTText(t, fileinfo.content);
importExport : [SyntaxTree] = get_flow_importExport_s(st);
imports = fold(importExport, [], \acc, ts : SyntaxTree -> {
if (ts.rule == st_import) {
arrayPush(acc, FcImport(grab(get_flow_path(ts)), false, ts.start, ts.end));
} else if (ts.rule == st_dynamicImport) {
arrayPush(acc, FcImport(grab(get_flow_path(ts)), true, ts.start, ts.end));
} else {
// forbid & export
acc;
}
});
forbids = fold(importExport, [], \acc, ts : SyntaxTree -> {
if (ts.rule == st_forbid) {
arrayPush(acc, FcForbid(grab(get_flow_path(ts)), ts.start, ts.end));
} else acc;
});
exports = fold(importExport, makeSet(), \acc, ts : SyntaxTree -> {
if (ts.rule == st_export) {
decls = get_flow_toplevelDeclaration_s(ts);
fold(decls, acc, \acc2, d -> {
name = grab(get_flow_id(d));
insertSet(acc2, name)
});
} else acc;
});
// Find the decls in export sections
exporttoplevels = fold(importExport, [], \acc, ts -> {
if (ts.rule == st_export) {
decls = get_flow_toplevelDeclaration_s(ts);
concat(acc, decls);
} else acc;
});
// ...together with the main ones
toplevel = get_flow_toplevelDeclaration_s(st);
checkTopDeclsForDuplicates(toplevel, fileinfo.flowfile, grab, errors);
toplevels = concat(exporttoplevels, toplevel);
dummyFcTypeEnv = FcTypeEnv(
FcTypeEnvGlobal(ref makeTree()),
FcTypeEnvProgram(
facc,
makeTree(),
\e : FcError -> fcPrintln(e.message),
ref 0,
ref makeTree(),
emptyGSubtypeGraph()
),
local
);
// OK, we construct a new tyvar group factory
dacc0 = DesugarAcc(fileinfo, facc.names, makeTree(), makeTree(), false, dummyFcTypeEnv, makeIdGroup(facc.tyvarIdFactory), errors, ref []);
// Find all struct defs
structs : Tree<string, FcTypeStruct> = fold(toplevels, makeTree(), \acc, t -> {
structWithCount = \s1 : FcTypeStruct -> {
typars = collectTypars(local, s1, makeSet());
ntp = mapSet(typars, \tp -> {
tt : FcType = FcTypeParameter(tp, s1.info);
tt
});
FcTypeStruct(s1.name, set2array(ntp), s1.args, s1.info);
}
if (t.rule == st_structdecl) {
id = grab(get_flow_id(t));
funargs = get_flow_funargs_s(t);
types = if (funargs == []) [] else desugarStructArgs(dacc0, errors, id, funargs[0]);
s1 = FcTypeStruct(id, [], types, FcInfo2(t.start, t.end));
s2 = structWithCount(s1);
setTree(acc, id, s2);
} else if (t.rule == st_function) {
fargs = get_flow_function_args(t);
// Functions without a return type nor code is a struct
if (fargs.choice == 0 && get_flow_returnType_s(fargs) == []) {
id = grab(get_flow_id(t));
funargs = get_flow_funargs2_s(fargs);
args = if (funargs == []) [] else desugarStructArgs2(dacc0, errors, id, funargs);
s1 = FcTypeStruct(id, [], args, FcInfo2(t.start, t.end));
s2 = structWithCount(s1);
setTree(acc, id, s2);
} else acc
} else acc
});
// Look for the toplevels that have some code in them
initOrder = fold(toplevels, [], \acc, t -> {
if (t.rule == st_assign || t.rule == st_function || t.rule == st_vardecl) {
id = grab(get_flow_id(t));
if (containsKeyTree(structs, id)) acc
else {
if (t.rule == st_function) {
fargs = get_flow_function_args(t);
if (fargs.choice == 1) {
// There is a body
arrayPush(acc, id);
} else {
// This is the declaration without a body.
acc;
}
} else if (t.rule == st_assign) {
// Variable?
arrayPush(acc, id);
} else if (t.rule == st_vardecl) {
ae = get_flow_assignExp_s(t);
if (ae != []) {
// A var decl with code
arrayPush(acc, id);
} else acc;
} else {
fcPrintln(i2s(t.rule));
acc;
}
}
} else {
acc;
}
});
dacc1 = DesugarAcc(fileinfo, facc.names, structs, makeTree(), false, dacc0.env, dacc0.tyvarIdGroup, dacc0.errors, dacc0.stringIncludes);
// Find all unions, but keep them named, and unresolved
unions : Tree<string, FcTypeUnion> = fold(toplevels, makeTree(), \acc, t -> {
if (t.rule == st_union) {
id = grab(get_flow_id(t));
typelist = get_flow_typelist_s(t);
tnames = get_flow_typenames(t);
fcstructs = desugarTypenames(dacc1, tnames);
polytypes = if (typelist == []) [] else desugarTypes(dacc1, get_flow_types(typelist[0]));
setTree(acc, id, FcTypeUnion(id, polytypes, fcstructs, FcInfo2(t.start, t.end)));
} else acc;
});
dacc = DesugarAcc(fileinfo, facc.names, structs, unions, true, dacc1.env, dacc1.tyvarIdGroup, dacc1.errors, dacc1.stringIncludes);
// Collect all definitions and declaration of each function
functions1 : Tree<string, [FcFunctionDec]> = fold(toplevels, makeTree(), \acc, t -> {
info = \ -> FcInfo(ref None(), t.start, t.end);
if (t.rule == st_function) {
id = grab(get_flow_id(t));
fargs = get_flow_function_args(t);
ci = FcInfo2(t.start, t.end);
if (fargs.choice == 0) {
returnType = get_flow_returnType_s(fargs);
if (returnType != []) {
r = returnType[0];
ty = get_flow_type(r);
rettype = desugarFcType(dacc, ty);
args = get_flow_funargs2_s(fargs);
targs = if (args == []) [] else desugarFcFunArgs2(dacc, errors, args[0]);
type = FcTypeFunction2(targs, rettype, ci);
fn = FcFunctionDec(id, None(), type, info(), info());
treePushToArrayValue(acc, id, fn);
} else {
// A struct
acc;
}
} else {
args = get_flow_funargs_s(fargs);
targs = if (args == []) [] else desugarFcFunArgs(dacc, args[0]);
fun2 = get_flow_function_2(fargs);
fn = if (fun2.choice == 0) {
returnType = get_flow_returnType(fun2);
ty = get_flow_type(returnType);
rettype = desugarFcType(dacc, ty);
brace_semi = get_flow_brace_or_semi(fun2);
brace = get_flow_brace(brace_semi);
fcexp = desugarFcExp(dacc, brace);
type = FcTypeFunction2(targs, rettype, ci);
lambda = FcLambda(map(targs, \ta -> resolveFunArg2(dacc.tyvarIdGroup, ta, ci)), fcexp, info());
FcFunctionDec(id, Some(lambda), type, info(), info());
} else {
expr = get_flow_exp(fun2);
rettype = None();
fcexp = desugarFcExp(dacc, expr);
type = FcTypeFunction2(targs, rettype, ci);
lambda = FcLambda(map(targs, \ta -> resolveFunArg2(dacc.tyvarIdGroup, ta, ci)), fcexp, info());
FcFunctionDec(id, Some(lambda), type, info(), info());
}
treePushToArrayValue(acc, id, fn);
}
} else if (t.rule == st_functiondecl) {
id = grab(get_flow_id(t));
args = get_flow_argtypes_s(t);
returnType = get_flow_returnType(t);
rt = get_flow_type(returnType);
targs = if (args == []) [] else desugarArgTypes(dacc, args[0]);
rtype = desugarFcType(dacc, rt);
type = FcTypeFunction2(targs, rtype, FcInfo2(t.start, t.end));
treePushToArrayValue(acc, id, FcFunctionDec(id, None(), type, info(), info()));
} else {
acc;
}
});
functions : Tree<string, FcFunctionDec> = foldTree(functions1, makeTree(), \name : string, fns : [FcFunctionDec], acc : Tree<string, FcFunctionDec> -> {
n = length(fns);
if (n == 0) {
fcPrintln("NOT SUPPOSED TO HAPPEN");
acc;
} else {
// Resolve all functions to one canonical for each
ffn : FcFunctionDec = fold(tail(fns), fns[0], \acc2 : FcFunctionDec, fn : FcFunctionDec -> {
alam : Maybe<FcLambda> = acc2.lambda;
flam : Maybe<FcLambda> = fn.lambda;
lam : Maybe<FcLambda> = eitherMap(alam, \ll -> {
maybeApply(flam, \ll2 : FcLambda -> {
// If we have two bodies, complain!
refArrayPush(errors, FcError("Two bodies for " + name, [
FcPosition(fileinfo.flowfile, ll.info.start, ll.info.end),
FcPosition(fileinfo.flowfile, ll2.info.start, ll2.info.end),
]));
});
alam;
}, flam);
// Which of the two might have a body? This is the primary function type to fill
filledType : FcTypeFunction2 = fillFcTypeFunction(dummyFcTypeEnv, acc2.declType, fn.declType,
\m, t1, t2 -> {
refArrayPush(errors, FcError(m, [
FcPosition(fileinfo.flowfile, t1.info.start, t2.info.end),
FcPosition(fileinfo.flowfile, t2.info.start, t2.info.end),
]));
}
);
infos = switch (fn.lambda) {
Some(__): Pair(acc2.declInfo, fn.defiInfo); // fn is a definition
None(): Pair(fn.declInfo, acc2.defiInfo); // fn is a declaration
}
FcFunctionDec(name, lam, filledType, infos.first, infos.second)
});
switch (ffn.lambda) {
None(): {
refArrayPush(errors, FcError("Missing body for " + name, [
FcPosition(fileinfo.flowfile, ffn.declInfo.start, ffn.declInfo.end),
]));
acc;
}
Some(ffnlambda): {
// Convert the FcTypeFunction2 to FcTypeFunction and put in the info field
fntype : FcTypeFunction = FcTypeFunction(mapi(ffn.declType.args, \i, a -> {
if (i < length(ffnlambda.args)) {
aname = ffnlambda.args[i].name;
FcFunArg(aname, switch (a.type) {
None(): makeFcTyVar2(dacc.tyvarIdGroup, ffn.declType.info);
Some(at): at
})
} else {
FcFunArg("", makeFcTyVar2(dacc.tyvarIdGroup, ffn.declType.info));
}
}), switch (ffn.declType.returnType) {
None(): makeFcTyVar2(dacc.tyvarIdGroup, ffn.declType.info);
Some(rt): rt;
}, ffn.declType.info);
(ffn.declInfo).type := Some(fntype);
(ffn.defiInfo).type := Some(fntype);
fnf = switch (ffn.lambda) {
None(): ffn;
Some(lm): {
(lm.info).type := Some(fntype);
// Make sure the function arguments are the right type in the lambda
FcFunctionDec(
ffn.name,
Some(FcLambda(fntype.args, lm.body, lm.info)),
ffn.declType, ffn.declInfo, ffn.defiInfo
);
}
}
setTree(acc, name, fnf);
}
}
}
});
// Check type consistency of all function declarations:
// arity, types of arguments and return types (if specified) must be the same
traverseInOrder(functions1, \name, decls ->
iter(decls, \decl1 ->
switch (lookupTree(functions, name)) {
Some(decl2): {
if (!fcTypeFunctionsAreConsistent(decl1.declType, decl2.declType)) {
refArrayPush(errors, FcError("Inconsistent " + name + " function declarations", [
FcPosition(fileinfo.flowfile, decl1.declInfo.start, decl1.declInfo.end),
FcPosition(fileinfo.flowfile, decl2.declInfo.start, decl2.declInfo.end),
]));
}
}
None(): {
fcPrintln("impossible branch in function desugarFcModule, function declarations consistency check");
}
}
)
);
globalVars1 : Tree<string, [FcGlobalVar]> = fold(toplevels, makeTree(), \acc, t -> {
if (t.rule == st_assign) {
id = grab(get_flow_id(t));
ex = desugarFcExp(dacc, get_flow_exp(t));
gv = FcGlobalVar(id, Some(ex), FcInfo(ref None(), t.start, t.end), FcInfo(ref None(), t.start, t.end));
treePushToArrayValue(acc, id, gv);
} else if (t.rule == st_vardecl) {
id = grab(get_flow_id(t));
type = desugarFcType(dacc, get_flow_type(t));
aex = get_flow_assignExp_s(t);
if (aex == []) {
gv = FcGlobalVar(id, None(), FcInfo(ref type, t.start, t.end), FcInfo(ref None(), t.start, t.end));
treePushToArrayValue(acc, id, gv);
} else {
ex = desugarFcExp(dacc, get_flow_exp(aex[0]));
gv = FcGlobalVar(id, Some(ex), FcInfo(ref None(), t.start, t.end), FcInfo(ref type, t.start, t.end));
treePushToArrayValue(acc, id, gv);
}
} else {
acc;
}
});
// TODO: Resolve all global vars to one canonical for each
globalVars : Tree<string, FcGlobalVar> = foldTree(globalVars1, makeTree(), \name : string, vars : [FcGlobalVar], acc : Tree<string, FcGlobalVar> -> {
n = length(vars);
if (n == 0) {
fcPrintln("NOT SUPPOSED TO HAPPEN");
acc;
} else {
// Resolve all functions to one canonical for each
gvar = fold(tail(vars), vars[0], \acc2 : FcGlobalVar, var : FcGlobalVar -> {
abody : Maybe<FcExp> = acc2.value;
fbody : Maybe<FcExp> = var.value;
onError = \e, info1, info2 -> refArrayPush(errors, FcError(name + ": " + e, [
FcPosition(fileinfo.flowfile, info1.start, info1.end),
FcPosition(fileinfo.flowfile, info2.start, info2.end),
]));
body : Maybe<FcExp> = switch (abody : Maybe<FcExp>) {
None(): fbody;
Some(__): { // Workaround since Some(ll) results in wrong type FcBool instead of FcExp
ll : FcExp = abody.value;
maybeApply(fbody, \ll2 : FcExp -> {
onError("Two values", ll.info, ll2.info)
});
abody;
}
}
declInfo : FcInfo = joinInfos(dummyFcTypeEnv, var.declInfo, acc2.declInfo, \e -> {
onError(e, var.declInfo, acc2.declInfo)
});
bodyInfo : FcInfo = joinInfos(dummyFcTypeEnv, var.bodyInfo, acc2.bodyInfo, \e -> {
onError(e, var.declInfo, acc2.declInfo)
});
combinedInfo = joinInfos(dummyFcTypeEnv, declInfo, bodyInfo, \e -> {
onError(e, declInfo, declInfo)
});
FcGlobalVar(name, body, combinedInfo, combinedInfo)
});
if (gvar.value == None()) {
refArrayPush(errors, FcError("Missing value for " + name, [
FcPosition(fileinfo.flowfile, gvar.declInfo.start, gvar.declInfo.end),
]));
}
setTree(acc, name, gvar);
}
});
natives : Tree<string, FcNativeDec> = fold(toplevels, makeTree(), \acc, t -> {
if (t.rule == st_native) {
//native = {#}:in "native" s id:i ws ":" ws ("io" ws { one() })?:io type:t "=" ws name$n ws ";" {#}:e ws { FaNativeDecl(:i, :io, :t, $n, :in, :e)};
id = grab(get_flow_id(t));
io = get_flow_native_io_s(t) != [];
type = get_flow_type(t);
name = grab(get_flow_name(t));
fctype = desugarFcType(dacc, type);
switch (fctype : Maybe<FcType>) {
None(): acc;
Some(fct): {
// Grab any fall-back native implementation here
fallback = lookupTree(functions, id);
// OK, we should fill in the type of the fallback from the native type
fallback2 = eitherMap(fallback, \ffn -> {
switch (fct) {
FcTypeFunction(__, __, __): {
ft : FcTypeFunction2 = ffn.declType;
// Join ntf : FcTypeFunction and ft and make a new FcFunctionDec
// with a new declType : FcTypeFunction2 with the joined result
nt : FcTypeFunction2 = fcTypeFunction2(fct);
jt2 = fillFcTypeFunction(dummyFcTypeEnv, ft, nt,
\m, t1, t2 -> {
refArrayPush(errors, FcError(m, [
FcPosition(fileinfo.flowfile, t1.info.start, t2.info.end),
FcPosition(fileinfo.flowfile, t2.info.start, t2.info.end),
]));
}
);
// Now we have the new type
jt : FcTypeFunction = fcTypeFunction(jt2, fct);
// This type has to go into the lambda of the fallback function
jlambda = switch (ffn.lambda) {
None(): ffn.lambda;
Some(ll): {
ll.info.type := Some(jt);
// Update the type of the function arguments
Some(FcLambda(
mapi(ll.args, \i, arg -> {
FcFunArg(arg.name, jt.args[i].type)
}),
ll.body,
ll.info
));
}
}
jfn = FcFunctionDec(
ffn.name,
jlambda,
jt2,
ffn.declInfo,
ffn.defiInfo
);
ffn.declInfo.type := Some(jt);
ffn.defiInfo.type := Some(jt);
Some(jfn);
}
default: fallback;
}
}, fallback);
nat = FcNativeDec(id, io, fct, name, fallback2, FcInfo(ref None(), t.start, t.end));
setTree(acc, id, nat);
}
}
} else acc;
});
// We might have updated some fallback function types based on natives, so grab those
functions2 = foldTree(natives, functions, \name, nat, acc -> {
switch (nat.flowfallback) {
None(): acc;
Some(fb): {
setTree(acc, name, fb)
}
}
});
init = FcModule(
FcFileInfo(
fileinfo.flowfile,
fileinfo.trampstamp,
fileinfo.fullpath,
fileinfo.md5sum,
if (isConfigParameterTrue(config.config, "keep-sources"))
fileinfo.content
else
"", // We clear the content to save memory!
fileinfo.gensymid,
fileinfo.filesize
),
imports, // unresolved paths to included modules
forbids, // unresolved paths to forbid
exports, // names of exported unions, structs, functions, values, natives
structs, // structs : Tree<string, FcTypeStruct>,
unions, // unions : Tree<string, FcTypeUnion>,
functions2, // functions: [FcFunctionDec],
globalVars, // globalVars: [FcGlobalVar],
natives, // natives: [FcNativeDec],
uniq(initOrder), // initOrder : [string],
createStringIncludes(^(dacc.stringIncludes), config),
^errors,
getGroupId(dummyFcTypeEnv.program.acc.tyvarIdGroup),
false, // isCached
st.start,
st.end
);
init1 = FcModule(
init.fileinfo,
init.imports,
init.forbids,
init.exports,
init.structs,
init.unions,
init.functions,
init.globalVars,
init.natives,
concatA(makeInitOrder(config, init, init.initOrder)),
init.stringIncludes,
init.errors,
init.typevarid,
init.isCached,
init.start,
init.end
);
init1;
}
createStringIncludes(includes : [string], config : CompilerConfig) -> [FiFileInfo] {
useMd5 = getConfigParameter(config.config, "use-md5") == "1";
workingDir = getConfigParameterDef(config.config, "working-dir", "");
fold(includes, [], \acc, include -> {
realfile = findFlowRelativePath(include, false, config.includes, workingDir);
fileexists = fileExists(realfile);
fileinfo = FiFileInfo(
include,
if (fileexists) fileModified(realfile) else 0.0,
realfile,
if (useMd5) md5(getFileContent(realfile)) else dummyFiFileInfo.md5sum,
if (fileexists) fileSize(realfile) else 0.0,
-1.0
);
concat(acc, [fileinfo])
})
}
checkTopDeclsForDuplicates(toplevel : [SyntaxTree], flowfile : string, grab : (SyntaxTree) -> string, errors : ref [FcError]) -> void {
skip = \t -> {
if (t.rule == st_function) get_flow_function_args(t).choice == 0
else if (t.rule == st_structdecl) false
else if (t.rule == st_union) false
else true;
}
nm = \tp -> {
if (tp == st_function) "function"
else if (tp == st_structdecl) "struct"
else if (tp == st_union) "union"
else "";
}
fold(toplevel, makeTree(), \ids, t -> {
id = grab(get_flow_id(t));
if (id == "" || skip(t)) ids else {
dup_local = lookupTree(ids, id);
switch (dup_local) {
Some(dup_t): {
refArrayPush(errors, FcError("Duplicate " + nm(t.rule) + " name " + id + " with previously defined " + nm(dup_t.rule), [
FcPosition(flowfile, dup_t.start, dup_t.end),
FcPosition(flowfile, t.start, t.end),
]));
}
None(): { }
}
setTree(ids, id, t);
}
});
{ }
}
joinInfos(env : FcTypeEnv, info1 : FcInfo, info2 : FcInfo, onError : (string) -> void) -> FcInfo {
switch (^(info1.type)) {
None(): info2;
Some(vdt): {
switch (^(info2.type)) {
None(): info1;
Some(adt): {
// Try to join the types
declType : Maybe<FcType> = fillTypes(env, ^(info1.type), ^(info2.type), \e, t1, t2 -> {
onError(e);
});
FcInfo(ref declType, info1.start, info1.end);
}
}
}
}
}
resolveFunArg2(tyvarIdGroup : IdGroup, a : FcFunArg2, info : FcInfo2) -> FcFunArg {
FcFunArg(
a.name,
switch (a.type) {
None(): makeFcTyVar2(tyvarIdGroup, info);
Some(at): at;
}
)
}
desugarFcExp(dacc : DesugarAcc, st : SyntaxTree) -> FcExp {
info = dacc.fileinfo;
finfo = \ -> FcInfo(ref None(), st.start, st.end);
ci = FcInfo2(st.start, st.end);
if (st.rule == st_exp) {
if (st.choice == 0) {
// Quote
fcexp = desugarFcExp(dacc, get_flow_exp0(st));
FcCallPrim(FcQuote(), [fcexp], finfo());
} else {
println("Should not happen;");
FcCallPrim(FcQuote(), [], finfo());
}
} else if (st.rule == st_exp0) {
if (st.choice == 0) {
id = grabSTText(get_flow_id(st), info.content);
colontype = get_flow_colontype_s(st);
type = if (colontype != []) {
ctype = get_flow_type(colontype[0]);
desugarFcType(dacc, ctype);
} else None();
right = desugarFcExp(dacc, get_flow_exp(st));
rtype = switch (type) {
None(): {
switch (right) {
FcLambda(args, rt, __): {
// OK, we know the body is a function, so let us make such a type
FcTypeFunction(map(args, \arg -> FcFunArg("", makeFcTyVar2(dacc.tyvarIdGroup, ci))), makeFcTyVar2(dacc.tyvarIdGroup, ci), ci);
}
FcCallPrim(op, args, pi): {
switch (op) {
FcRefPrim(): {
FcTypeRef(makeFcTyVar2(dacc.tyvarIdGroup, ci), ci);
}
FcArrayPrim(): {
FcTypeArray(makeFcTyVar2(dacc.tyvarIdGroup, ci), ci);
}
default: {
makeFcTyVar2(dacc.tyvarIdGroup, ci);
}
}
}
default: {
makeFcTyVar2(dacc.tyvarIdGroup, ci);
}
}
}
Some(tt): tt;
}
FcLet(id, rtype, right, FcVoid(finfo()), finfo());
} else if (st.choice == 1) {
cond = get_flow_condexp(st);
thene = get_flow_exp(st);
elsee = get_flow_elseExp_s(st);
elseee = if (elsee == []) FcVoid(finfo()) else {
els = get_flow_exp(elsee[0]);
desugarFcExp(dacc, els);
}
FcIf(desugarFcExp(dacc, cond), desugarFcExp(dacc, thene), elseee, finfo());
} else if (st.choice == 2) {
atom = get_flow_atom(st);
id = grabSTText(get_flow_id(st), info.content);
right = get_flow_exp(st);
FcCallPrim(FcSetMutablePrim(id), [desugarFcExp(dacc, atom), desugarFcExp(dacc, right)], finfo());
} else {
desugarFcExp(dacc, get_flow_exp1(st));
}
} else if (st.rule == st_exp1) {
fcexp = desugarFcExp(dacc, get_flow_exp2(st));
assigns = get_flow_exp1_assign_s(st);
if (assigns != []) {
re = get_flow_exp(assigns[0]);
FcCallPrim(FcAssignPrim(), [fcexp, desugarFcExp(dacc, re)], finfo());
} else {
fcexp
}
} else if (st.rule == st_exp2) {
fcexp = desugarFcExp(dacc, get_flow_exp3(st));
pipes = get_flow_pipeExp_s(st);
fold(pipes, fcexp, \acc, pipe -> {
fn = get_flow_exp3(pipe);
desugarFcCall(dacc, FcCall(desugarFcExp(dacc, fn), [acc], finfo()));
});
} else if (st.rule == st_exp3) {
fcexp = desugarFcExp(dacc, get_flow_exp4(st));
ors = get_flow_orExp_s(st);
fold(ors, fcexp, \acc, or -> {
left = get_flow_exp4(or);
FcCallPrim(FcOrPrim(), [acc, desugarFcExp(dacc, left)], finfo());
});
} else if (st.rule == st_exp4) {
fcexp = desugarFcExp(dacc, get_flow_exp5(st));
ands = get_flow_andExp_s(st);
fold(ands, fcexp, \acc, and -> {
left = get_flow_exp5(and);
FcCallPrim(FcAndPrim(), [acc, desugarFcExp(dacc, left)], finfo());
});
} else if (st.rule == st_exp5) {
fcexp = desugarFcExp(dacc, get_flow_exp6(st));
comps = get_flow_exp5_compare_s(st);
fold(comps, fcexp, \acc, comp -> {
left = get_flow_exp6(comp);
op = get_flow_comparisonOp(comp);
ops = grabSTText(op, info.content);
primop = if (ops == "==") FcEqPrim()
else if (ops == "!=") FcNePrim()
else if (ops == "<=") FcLePrim()
else if (ops == ">=") FcGePrim()
else if (ops == "<") FcLtPrim()
else if (ops == ">") FcGtPrim()
else {
fcPrintln("Unexpected operation: " + ops);
FcEqPrim()
};
FcCallPrim(primop, [acc, desugarFcExp(dacc, left)], finfo());
});
} else if (st.rule == st_exp6) {
fcexp = desugarFcExp(dacc, get_flow_term(st));
adds = get_flow_additiveExp_s(st);
fold(adds, fcexp, \acc, add -> {
left = get_flow_term(add);
op = get_flow_plusMinus(add);
ops = grabSTText(op, info.content);
primop = if (ops == "+") FcPlusPrim()
else if (ops == "-") FcMinusPrim()
else {
fcPrintln("Unexpected operation: " + ops);
FcPlusPrim()
};
FcCallPrim(primop, [acc, desugarFcExp(dacc, left)], finfo());
});
} else if (st.rule == st_term) {
fcexp = desugarFcExp(dacc, get_flow_factor(st));
muls = get_flow_multiExp_s(st);
fold(muls, fcexp, \acc, mul -> {
left = get_flow_factor(mul);
op = get_flow_multiOp(mul);
ops = grabSTText(op, info.content);
primop = if (ops == "*") FcMulPrim()
else if (ops == "/") FcDivPrim()
else if (ops == "%") FcModPrim()
else {
fcPrintln("Unexpected operation: " + ops);
FcMulPrim()
};
FcCallPrim(primop, [acc, desugarFcExp(dacc, left)], finfo());
});
} else if (st.rule == st_factor) {
if (st.choice == 0) {
// ! factor
rfactor = desugarFcExp(dacc, get_flow_factor(st));
FcCallPrim(FcNotPrim(), [rfactor], finfo());
} else if (st.choice == 1) {
// - factor
rfactor = desugarFcExp(dacc, get_flow_factor(st));
// Negation of constants can be done sooner
switch (rfactor : FcExp) {
FcInt(i, __): FcInt(-i, finfo());
FcDouble(d, __): FcDouble(-d, finfo());
default: FcCallPrim(FcNegPrim(), [rfactor], finfo());
}
} else if (st.choice == 2) {
// Lambda
names = get_flow_argNames_s(st);
left = get_flow_exp(st);
args = if (names == []) [] else desugarArgNames(dacc, names[0]);
fargs = map(args, \ta -> resolveFunArg2(dacc.tyvarIdGroup, ta, ci));
FcLambda(fargs, desugarFcExp(dacc, left), finfo());
} else {
desugarFcExp(dacc, get_flow_factor(st));
}
} else if (st.rule == st_call) {
fcexp = desugarFcExp(dacc, get_flow_atom(st));
postfixes = get_flow_postfix_s(st);
fold(postfixes, fcexp, \acc, postfix -> {
if (postfix.choice == 0) {
// Call
arglist = get_flow_arglist_s(postfix);
args = if (arglist == []) [] else desugarArglist(dacc, arglist[0]);
desugarFcCall(dacc, FcCall(acc, args, FcInfo(ref None(), postfix.start, postfix.end)));
} else if (postfix.choice == 1) {
id = grabSTText(get_flow_id(postfix), info.content);
FcCallPrim(FcFieldPrim(id), [acc], FcInfo(ref None(), postfix.start, postfix.end));
} else if (postfix.choice == 2) {
// array indexing
index = get_flow_exp(postfix);
FcCallPrim(FcIndexPrim(), [acc, desugarFcExp(dacc, index)], FcInfo(ref None(), postfix.start, postfix.end));
} else {
// "With" construction
sourceType = switch (acc) {
FcVar(typeName, __) : typeName;
default : "";
}
fcCall = switch (lookupTree(dacc.fileStructs, sourceType)) {
None() : {
switch (lookupTree(dacc.names.structs, sourceType)) {
None() : {
refArrayPush(dacc.errors, FcError("Unknown struct type " + sourceType, [
FcPosition(dacc.fileinfo.flowfile, postfix.start, postfix.end),
]));
FcCall(acc, [], FcInfo(ref None(), postfix.start, postfix.end))
}
Some(sourceStructDef) : FcCall(acc, constructStructArgs(dacc, sourceStructDef.args, finfo, postfix), FcInfo(ref None(), postfix.start, postfix.end));
}
}
Some(sourceStructDef) : FcCall(acc, constructStructArgs(dacc, sourceStructDef.args, finfo, postfix), FcInfo(ref None(), postfix.start, postfix.end));
}
desugarFcCall(dacc, fcCall);
}
});
} else if (st.rule == st_atom) {
if (st.choice == 0) {
key = get_flow_keywords(st);
desugarFcExp(dacc, key);
} else if (st.choice == 1) {
id = grabSTText(get_flow_id(st), info.content);
if (false && (containsKeyTree(dacc.fileStructs, id) || containsKeyTree(dacc.names.structs, id))) {
fcPrintln(id + " is struct");
// TODO: Somehow, we could check if the following is a call, and if not convert
// this to CallPrim(struct)
FcVar(id, finfo());
} else {
FcVar(id, finfo());
}
} else if (st.choice == 2) {
number = get_flow_number(st);
desugarNumber(info, number);
} else if (st.choice == 4) {
expr = get_flow_exp(st);
desugarFcExp(dacc, expr);
} else if (st.choice == 5) {
FcVoid(finfo());
} else if (st.choice == 6) {
brace = get_flow_brace(st);
desugarBraces(dacc, brace);
} else if (st.choice == 7) {
exps = get_flow_exps_s(st);
ess = if (exps == []) [] else {
es1 = get_flow_exp(exps[0]);
ess2 = get_flow_exps2_s(exps[0]);
concat([desugarFcExp(dacc, es1)], map(ess2, \e -> {
desugarFcExp(dacc, get_flow_exp(e));
}));
}
FcCallPrim(FcArrayPrim(), ess, finfo());
} else if (st.choice == 8) {
atom = get_flow_atom(st);
FcCallPrim(FcDerefPrim(), [desugarFcExp(dacc, atom)], finfo());
} else if (st.choice == 9) {
atom = get_flow_atom(st);
// unquote
FcCallPrim(FcUnquote(), [desugarFcExp(dacc, atom)], finfo());
} else {
fcPrintln("TODO atom " + i2s(st.choice));
FcVoid(FcInfo(ref None(), st.start, st.end));
}
} else if (st.rule == st_keywords) {
if (st.choice == 0) {
FcBool(true, finfo());
} else if (st.choice == 1) {
FcBool(false, finfo());
} else if (st.choice == 2) {
cond = get_flow_condexp(st);
thene = get_flow_exp(st);
elsee = get_flow_elseExp_s(st);
elseee = if (elsee == []) FcVoid(finfo()) else {
els = get_flow_exp(elsee[0]);
desugarFcExp(dacc, els);
}
FcIf(desugarFcExp(dacc, cond), desugarFcExp(dacc, thene), elseee, finfo());
} else if (st.choice == 3) {
refe = get_flow_exp(st);
FcCallPrim(FcRefPrim(), [desugarFcExp(dacc, refe)], finfo());
} else if (st.choice == 5) {
e2 = get_flow_exp2(st);
t1 = get_flow_type(st);
ty1 = desugarFcType(dacc, t1);
t2 = get_flow_totype(st);
ty2 = desugarFcType(dacc, t2);
switch (ty1) {
None(): {
fcPrintln("Something is wrong");
FcVoid(finfo());
}
Some(typ1): switch (ty2) {
None(): {
fcPrintln("Something is wrong");
FcVoid(finfo());
}
Some(typ2): {
FcCast(desugarFcExp(dacc, e2), typ1, typ2, finfo());
}
}
}
} else {
fcPrintln("TODO: Keywords " + i2s(st.choice));
FcVoid(finfo());
}
} else if (st.rule == st_brace) {
desugarBraces(dacc, st);
} else if (st.rule == st_switch) {
se = get_flow_exp2(st);
st1 = get_flow_switchType_s(st);
st2 = if (st1 == []) None() else desugarFcType(dacc, get_flow_type(st1[0]));
st3 = switch (st2) {
None(): makeFcTyVar2(dacc.tyvarIdGroup, ci);