compiler/lowerings

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This module implements common simple lowerings.

Consts

genPrefix = ":tmp"
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Procs

proc addField(obj: PType; s: PSym; cache: IdentCache; idgen: IdGenerator): PSym {.
    ...raises: [], tags: [], forbids: [].}
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proc addUniqueField(obj: PType; s: PSym; cache: IdentCache; idgen: IdGenerator): PSym {.
    discardable, ...raises: [], tags: [], forbids: [].}
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proc addVar(father, v, value: PNode) {....raises: [], tags: [], forbids: [].}
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proc addVar(father, v: PNode) {....raises: [], tags: [], forbids: [].}
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proc callCodegenProc(g: ModuleGraph; name: string;
                     info: TLineInfo = unknownLineInfo;
                     arg1, arg2, arg3, optionalArgs: PNode = nil): PNode {.
    ...raises: [KeyError, Exception, ValueError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect],
    forbids: [].}
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proc createObj(g: ModuleGraph; idgen: IdGenerator; owner: PSym; info: TLineInfo;
               final = true): PType {....raises: [KeyError, Exception],
                                      tags: [ReadDirEffect, RootEffect],
                                      forbids: [].}
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proc evalOnce(g: ModuleGraph; value: PNode; idgen: IdGenerator; owner: PSym): PNode {.
    ...raises: [], tags: [], forbids: [].}
Turns (value) into (let tmp = value; tmp) so that 'value' can be re-used freely, multiple times. This is frequently required and such a builtin would also be handy to have in macros.nim. The value that can be reused is 'result.lastSon'! Source   Edit  
proc genAddrOf(n: PNode; idgen: IdGenerator; typeKind = tyPtr): PNode {.
    ...raises: [], tags: [], forbids: [].}
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proc genDeref(n: PNode; k = nkHiddenDeref): PNode {....raises: [], tags: [],
    forbids: [].}
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proc genHigh(g: ModuleGraph; n: PNode): PNode {.
    ...raises: [KeyError, Exception, ValueError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect],
    forbids: [].}
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proc genLen(g: ModuleGraph; n: PNode): PNode {.
    ...raises: [KeyError, Exception, ValueError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect],
    forbids: [].}
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proc getFieldFromObj(t: PType; v: PSym): PSym {....raises: [], tags: [],
    forbids: [].}
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proc indirectAccess(a, b: PSym; info: TLineInfo): PNode {....raises: [], tags: [],
    forbids: [].}
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proc indirectAccess(a: PNode; b: ItemId; info: TLineInfo): PNode {....raises: [],
    tags: [], forbids: [].}
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proc indirectAccess(a: PNode; b: PSym; info: TLineInfo): PNode {....raises: [],
    tags: [], forbids: [].}
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proc indirectAccess(a: PNode; b: string; info: TLineInfo; cache: IdentCache): PNode {.
    ...raises: [], tags: [], forbids: [].}
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proc lowerSwap(g: ModuleGraph; n: PNode; idgen: IdGenerator; owner: PSym): PNode {.
    ...raises: [], tags: [], forbids: [].}
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proc lowerTupleUnpacking(g: ModuleGraph; n: PNode; idgen: IdGenerator;
                         owner: PSym): PNode {.
    ...raises: [KeyError, Exception, ValueError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect],
    forbids: [].}
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proc lowerTupleUnpackingForAsgn(g: ModuleGraph; n: PNode; idgen: IdGenerator;
                                owner: PSym): PNode {....raises: [KeyError],
    tags: [], forbids: [].}
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proc newAsgnStmt(le, ri: PNode): PNode {....raises: [], tags: [], forbids: [].}
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proc newDeref(n: PNode): PNode {.inline, ...raises: [], tags: [], forbids: [].}
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proc newDotExpr(obj, b: PSym): PNode {....raises: [], tags: [], forbids: [].}
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proc newFastAsgnStmt(le, ri: PNode): PNode {....raises: [], tags: [], forbids: [].}
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proc newFastMoveStmt(g: ModuleGraph; le, ri: PNode): PNode {.
    ...raises: [KeyError, Exception, ValueError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect],
    forbids: [].}
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proc newIntLit(g: ModuleGraph; info: TLineInfo; value: BiggestInt): PNode {.
    ...raises: [KeyError, Exception, ValueError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect],
    forbids: [].}
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proc newTryFinally(body, final: PNode): PNode {....raises: [], tags: [],
    forbids: [].}
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proc newTupleAccess(g: ModuleGraph; tup: PNode; i: int): PNode {.
    ...raises: [KeyError, Exception, ValueError, IOError, ERecoverableError], tags: [
    ReadDirEffect, RootEffect, WriteIOEffect, ReadIOEffect, ReadEnvEffect],
    forbids: [].}
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proc newTupleAccessRaw(tup: PNode; i: int): PNode {....raises: [KeyError],
    tags: [], forbids: [].}
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proc rawAddField(obj: PType; field: PSym) {....raises: [], tags: [], forbids: [].}
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proc rawDirectAccess(obj, field: PSym): PNode {....raises: [], tags: [],
    forbids: [].}
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proc rawIndirectAccess(a: PNode; field: PSym; info: TLineInfo): PNode {.
    ...raises: [], tags: [], forbids: [].}
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