Grammalecte  Diff

# Create a Direct Acyclic Rule Graph (DARG)

import re
import traceback
import json

import darg


dDEF = {}
dACTIONS = {}
dFUNCTIONS = {}


def prepareFunction (s, bTokenValue=False):
    s = s.replace("__also__", "bCondMemo")
    s = s.replace("__else__", "not bCondMemo")

        ## no action, break loop if condition is False
        return [sOption, sCondition, cAction, ""]
    else:
        print("# Unknown action at line " + sIdAction)
        return None


def printBookmark (nLevel, sComment, nLine):
    print("  {:>6}:  {}".format(nLine, "  " * nLevel + sComment))


def make (spLang, sLang, bJavaScript):
    "compile rules, returns a dictionary of values"
    # for clarity purpose, don’t create any file here

    print("> read graph rules file...")
    try:
        lRules = open(spLang + "/rules_graph.grx", 'r', encoding="utf-8").readlines()
    except:
        print("Error. Rules file in project [" + sLang + "] not found.")
        exit()

    # removing comments, zeroing empty lines, creating definitions, storing tests, merging rule lines
    print("  parsing rules...")
    global dDEF
    lTest = []
    lTokenLine = []
    sActions = ""
    nPriority = 4
    dAllGraph = {}
    sGraphName = ""

    for i, sLine in enumerate(lRules, 1):
        sLine = sLine.rstrip()
        if "\t" in sLine:
            # tabulation not allowed
            print("Error. Tabulation at line: ", i)
            exit()
        if sLine.startswith('#END'):
            # arbitrary end
            printBookmark(0, "BREAK BY #END", i)
            break
        elif sLine.startswith("#"):
            # comments
            pass
        elif sLine.startswith("GRAPH_NAME: "):
            # Graph name
            m = re.match("GRAPH_NAME: +([a-zA-Z_][a-zA-Z_0-9]*)+", sLine.strip())
            if m:
                sGraphName = m.group(1)
                if sGraphName in dAllGraph:
                    print("Error. Group name " + sGraphName + " already exists.")
                    exit()
                dAllGraph[sGraphName] = []
            else:
                print("Error. Graph name not found in", sLine.strip())
                exit()
        elif sLine.startswith("DEF:"):
            # definition
            m = re.match("DEF: +([a-zA-Z_][a-zA-Z_0-9]*) +(.+)$", sLine.strip())
            if m:
                dDEF["{"+m.group(1)+"}"] = m.group(2)
            else:
                print("Error in definition: ", end="")
                print(sLine.strip())
        elif sLine.startswith("TEST:"):
            # test
            lTest.append("g{:<7}".format(i) + "  " + sLine[5:].strip())
        elif sLine.startswith("TODO:"):
            # todo
            pass
        elif sLine.startswith("!!"):
            # bookmarks
            m = re.search("^!!+", sLine)
            nExMk = len(m.group(0))
            if sLine[nExMk:].strip():
                printBookmark(nExMk-2, sLine[nExMk:].strip(), i)
        elif sLine.startswith("__") and sLine.endswith("__"):
            # new rule group
            m = re.match("__(\\w+)(!\\d|)__", sLine)
            if m:
                sRuleName = m.group(1)
                nPriority = int(m.group(2)[1:]) if m.group(2)  else 4
            else:

                exit()
            for j, sTokenLine in lTokenLine:
                dAllGraph[sGraphName].append((j, sRuleName, sTokenLine, sActions, nPriority))
            lTokenLine.clear()
            sActions = ""
            sRuleName = ""
            nPriority = 4
        elif sLine.startswith(("        <<-", "    <<-")):
            # actions
            sActions += " " + sLine.strip()
        elif sLine.startswith(("    ")):
            lTokenLine.append([i, sLine.strip()])
        else:
            print("Unknown line:")
            print(sLine)

    # tests
    print("  list tests...")
    sGCTests = "\n".join(lTest)
    sGCTestsJS = '{ "aData2": ' + json.dumps(lTest, ensure_ascii=False) + " }\n"

    # processing rules
    print("  preparing rules...")
    for sGraphName, lRuleLine in dAllGraph.items():
        lPreparedRule = []
        for i, sRuleGroup, sTokenLine, sActions, nPriority in lRuleLine:
            for lRule in createRule(i, sRuleGroup, sTokenLine, sActions, nPriority):
                lPreparedRule.append(lRule)

    for sActionName, aAction in dACTIONS.items():
        print(sActionName, aAction)

    # Result
    d = {
        "graph_callables": sPyCallables,
        "graph_gctests": sGCTests,
        "rules_graphs": dAllGraph,
        "rules_actions": dACTIONS
    }

    return d