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Revised implicit type conversions; Initial function expression compilation

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dcodeIO
2018-02-28 01:48:01 +01:00
parent bda6cb9792
commit d4c00eaba3
36 changed files with 940 additions and 1754 deletions
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192
src/types.ts
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@ -122,7 +122,7 @@ export class Type {
/** Composes a function type from this type and a function. */
asFunction(functionType: Function): Type {
assert(this.kind == TypeKind.USIZE && !this.isReference);
assert(this.kind == TypeKind.U32 && !this.isReference);
var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);
ret.functionType = functionType;
return ret;
@ -140,6 +140,196 @@ export class Type {
return this.nullableType;
}
/** Tests if a value of this type is assignable to a target of the specified type. */
isAssignableTo(target: Type): bool {
var currentClass: Class | null;
var targetClass: Class | null;
var currentFunction: Function | null;
var targetFunction: Function | null;
if (this.isReference) {
if (target.isReference) {
if (currentClass = this.classType) {
if (targetClass = target.classType) {
return currentClass.isAssignableTo(targetClass);
}
} else if (currentFunction = this.functionType) {
if (targetFunction = target.functionType) {
return currentFunction.isAssignableTo(targetFunction);
}
}
}
} else if (!target.isReference) {
switch (this.kind) {
case TypeKind.I8:
switch (target.kind) {
case TypeKind.I8: // same
case TypeKind.I16: // larger
case TypeKind.I32: // larger
case TypeKind.I64: // larger
case TypeKind.ISIZE: // larger
case TypeKind.U8: // signed to unsigned
case TypeKind.U16: // larger
case TypeKind.U32: // larger
case TypeKind.U64: // larger
case TypeKind.USIZE: // larger
case TypeKind.F32: // safe
case TypeKind.F64: // safe
return true;
}
break;
case TypeKind.I16:
switch (target.kind) {
case TypeKind.I16: // same
case TypeKind.I32: // larger
case TypeKind.I64: // larger
case TypeKind.ISIZE: // larger
case TypeKind.U16: // signed to unsigned
case TypeKind.U32: // larger
case TypeKind.U64: // larger
case TypeKind.USIZE: // larger
case TypeKind.F32: // safe
case TypeKind.F64: // safe
return true;
}
break;
case TypeKind.I32:
switch (target.kind) {
case TypeKind.I32: // same
case TypeKind.I64: // larger
case TypeKind.ISIZE: // same or larger
case TypeKind.U32: // signed to unsigned
case TypeKind.U64: // larger
case TypeKind.USIZE: // signed to unsigned or larger
case TypeKind.F64: // safe
return true;
}
break;
case TypeKind.I64:
switch (target.kind) {
case TypeKind.I64: // same
case TypeKind.U64: // signed to unsigned
return true;
case TypeKind.ISIZE: // possibly same
case TypeKind.USIZE: // possibly signed to unsigned
return target.size == 64;
}
break;
case TypeKind.ISIZE:
switch (target.kind) {
case TypeKind.I32: // possibly same
case TypeKind.U32: // possibly signed to unsigned
return this.size == 32;
case TypeKind.I64: // same or larger
case TypeKind.ISIZE: // same
case TypeKind.U64: // signed to unsigned or larger
case TypeKind.USIZE: // signed to unsigned
return true;
case TypeKind.F64: // possibly safe
return target.size == 32;
}
break;
case TypeKind.U8:
switch (target.kind) {
case TypeKind.I16: // larger
case TypeKind.I32: // larger
case TypeKind.I64: // larger
case TypeKind.ISIZE: // larger
case TypeKind.U8: // same
case TypeKind.U16: // larger
case TypeKind.U32: // larger
case TypeKind.U64: // larger
case TypeKind.USIZE: // larger
case TypeKind.F32: // safe
case TypeKind.F64: // safe
return true;
}
break;
case TypeKind.U16:
switch (target.kind) {
case TypeKind.I32: // larger
case TypeKind.I64: // larger
case TypeKind.ISIZE: // larger
case TypeKind.U16: // same
case TypeKind.U32: // larger
case TypeKind.U64: // larger
case TypeKind.USIZE: // larger
case TypeKind.F32: // safe
case TypeKind.F64: // safe
return true;
}
break;
case TypeKind.U32:
switch (target.kind) {
case TypeKind.I64: // larger
case TypeKind.U32: // same
case TypeKind.U64: // larger
case TypeKind.USIZE: // same or larger
case TypeKind.F64: // safe
return true;
}
break;
case TypeKind.U64:
switch (target.kind) {
case TypeKind.U64: // same
return true;
case TypeKind.USIZE: // possibly same
return target.size == 64;
}
break;
case TypeKind.USIZE:
switch (target.kind) {
case TypeKind.U32: // possibly same
return this.size == 32;
case TypeKind.U64: // same or larger
case TypeKind.USIZE: // same
return true;
case TypeKind.F64: // possibly safe
return target.size == 32;
}
break;
case TypeKind.BOOL:
switch (target.kind) {
case TypeKind.I8: // larger
case TypeKind.I16: // larger
case TypeKind.I32: // larger
case TypeKind.I64: // larger
case TypeKind.ISIZE: // larger
case TypeKind.U8: // larger
case TypeKind.U16: // larger
case TypeKind.U32: // larger
case TypeKind.U64: // larger
case TypeKind.USIZE: // larger
case TypeKind.BOOL: // same
return true;
}
break;
case TypeKind.F32:
switch (target.kind) {
case TypeKind.F32: // same
case TypeKind.F64: // larger
return true;
}
break;
case TypeKind.F64:
return target.kind == TypeKind.F64;
}
}
return false;
}
/** Converts this type to its TypeScript representation. */
toString(kindOnly: bool = false): string {
switch (this.kind) {